Find out if there are any endangered species in your state, your country, island, etc. Browse endangered species listings according to area on our planet using
the selection box below.
below. Browse the different areas in the pulldown for other countries or specific US
or Canadian states. For sea creatures and creatures found on islands in the oceans, we recommend browsing the
list.
This list is made possible through a database keyword search/filtering process which may not be 100% accurate. Therefore, all endangered species of Ecuador may not be listed here. For a complete list of endangered species in South America, browse the
endangered species list.
| | Species Name | Scientific Name | Group | Range |
|---|
| 1. | Acalypha ecuadorica | Acalypha ecuadorica | Plants | Ecuador |
| 2. | Acalypha schimpffii | Acalypha schimpffii | Plants | Ecuador |
| 3. | Acalypha eggersii | Acalypha eggersii | Plants | Ecuador |
| 4. | Achyrocline mollis | Achyrocline mollis | Plants | Ecuador |
| 5. | Achyrocline glandulosa | Achyrocline glandulosa | Plants | Ecuador |
| 6. | Aciotis aristellata | Aciotis aristellata | Plants | Ecuador |
| 7. | Aechmea tayoensis | Aechmea tayoensis | Plants | Ecuador |
| 8. | Aechmea manzanaresiana | Aechmea manzanaresiana | Plants | Ecuador |
| 9. | Aechmea kentii | Aechmea kentii | Plants | Ecuador |
| 10. | Aegiphila schimpffii | Aegiphila schimpffii | Plants | Ecuador |
| 11. | Aegiphila monticola | Aegiphila monticola | Plants | Ecuador |
| 12. | Aegiphila lopez-palacii | Aegiphila lopez-palacii | Plants | Ecuador |
| 13. | Aegiphila glomerata | Aegiphila glomerata | Plants | Ecuador |
| 14. | Aequatorium lepidotum | Aequatorium lepidotum | Plants | Ecuador |
| 15. | Aequatorium asterotrichum | Aequatorium asterotrichum | Plants | Ecuador |
| 16. | Aetheolaena decipiens | Aetheolaena decipiens | Plants | Ecuador |
| 17. | Aetheolaena subinvolucrata | Aetheolaena subinvolucrata | Plants | Ecuador |
| 18. | Aetheolaena pichinchensis | Aetheolaena pichinchensis | Plants | Ecuador |
| 19. | Aetheolaena mochensis | Aetheolaena mochensis | Plants | Ecuador |
| 20. | Aetheolaena ledifolia | Aetheolaena ledifolia | Plants | Ecuador |
| 21. | Aetheolaena hypoleuca | Aetheolaena hypoleuca | Plants | Ecuador |
| 22. | Agua Rica Leaf Frog | Phyllomedusa ecuatoriana | Amphibians | Ecuador |
| 23. | Aiphanes grandis | Aiphanes grandis | Plants | Ecuador |
| 24. | Aiphanes verrucosa | Aiphanes verrucosa | Plants | Ecuador |
| 25. | Allobates kingsburyi | Allobates kingsburyi | Amphibians | Ecuador |
| 26. | Allophylus dodsonii | Allophylus dodsonii | Plants | Ecuador |
| 27. | Aloysia dodsoniorum | Aloysia dodsoniorum | Plants | Ecuador |
| 28. | Alsophila esmeraldensis | Alsophila esmeraldensis | Plants | Ecuador |
| 29. | Alternanthera nesiotes | Alternanthera nesiotes | Plants | Ecuador |
| 30. | Amanoa anomala | Amanoa anomala | Plants | Ecuador |
| 31. | Amazon Giant Glass Frog | Centrolene pipilatum | Amphibians | Ecuador |
| 32. | Amsinckia marginata | Amsinckia marginata | Plants | Ecuador |
| 33. | Ancient Antwren | Herpsilochmus gentryi | Birds | Ecuador, Peru |
| 34. | Andean Catfish | Astroblepus ubidiai | Fishes | Ecuador |
| 35. | Andean Condor | Vultur gryphus | Birds | Colombia to Chile and Argentina |
| 36. | Andes Marsupial Frog | Gastrotheca andaquiensis | Amphibians | Colombia, Ecuador |
| 37. | Andropogon benthamianus | Andropogon benthamianus | Plants | Ecuador |
| 38. | Andropogon scabriglumis | Andropogon scabriglumis | Plants | Ecuador |
| 39. | Andropogon lanuginosus | Andropogon lanuginosus | Plants | Ecuador |
| 40. | Anemone jamesonii | Anemone jamesonii | Plants | Ecuador |
| 41. | Aniba rosaeodora | Aniba rosaeodora | Plants | Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela |
| 42. | Aniba pilosa | Aniba pilosa | Plants | Ecuador |
| 43. | Annona deceptrix | Annona deceptrix | Plants | Ecuador |
| 44. | Annona conica | Annona conica | Plants | Ecuador |
| 45. | Annona oligocarpa | Annona oligocarpa | Plants | Ecuador |
| 46. | Annona manabiensis | Annona manabiensis | Plants | Ecuador |
| 47. | Annona hystricoides | Annona hystricoides | Plants | Ecuador |
| 48. | Annona ecuadorensis | Annona ecuadorensis | Plants | Ecuador |
| 49. | Anthurium coerulescens | Anthurium coerulescens | Plants | Ecuador |
| 50. | Anthurium scaberulum | Anthurium scaberulum | Plants | Ecuador |
| 51. | Anthurium bushii | Anthurium bushii | Plants | Ecuador |
| 52. | Anthurium saccardoi | Anthurium saccardoi | Plants | Ecuador |
| 53. | Anthurium bucayanum | Anthurium bucayanum | Plants | Ecuador |
| 54. | Anthurium pichinchae | Anthurium pichinchae | Plants | Ecuador |
| 55. | Anthurium linguifolium | Anthurium linguifolium | Plants | Ecuador |
| 56. | Anthurium hieronymi | Anthurium hieronymi | Plants | Ecuador |
| 57. | Anthurium eggersii | Anthurium eggersii | Plants | Ecuador |
| 58. | Anthurium tenuifolium | Anthurium tenuifolium | Plants | Ecuador |
| 59. | Anthurium cutucuense | Anthurium cutucuense | Plants | Ecuador |
| 60. | Anthurium tenuicaule | Anthurium tenuicaule | Plants | Ecuador |
| 61. | Aphanactis barclayae | Aphanactis barclayae | Plants | Ecuador |
| 62. | Aphelandra guayasii | Aphelandra guayasii | Plants | Ecuador |
| 63. | Aphelandra galba | Aphelandra galba | Plants | Ecuador |
| 64. | Aphelandra cinnabarina | Aphelandra cinnabarina | Plants | Ecuador |
| 65. | Aphelandra azuayensis | Aphelandra azuayensis | Plants | Ecuador |
| 66. | Aphelandra phaina | Aphelandra phaina | Plants | Ecuador |
| 67. | Aphelandra loxensis | Aphelandra loxensis | Plants | Ecuador |
| 68. | Aphelandra harlingii | Aphelandra harlingii | Plants | Ecuador |
| 69. | Aquatic Rat | Anotomys leander | Mammals | Ecuador |
| 70. | Arachniodes squamulosa | Arachniodes squamulosa | Plants | Ecuador |
| 71. | Arachnothryx fosbergii | Arachnothryx fosbergii | Plants | Ecuador |
| 72. | Arachnothryx chimboracensis | Arachnothryx chimboracensis | Plants | Ecuador |
| 73. | Aristeguietia chimborazensis | Aristeguietia chimborazensis | Plants | Ecuador |
| 74. | Arthur's Stubfoot Toad | Atelopus arthuri | Amphibians | Ecuador |
| 75. | Ashy Storm-petrel | Oceanodroma homochroa | Birds | California, Ecuador, Mexico |
| 76. | Asplenium virens | Asplenium virens | Plants | Ecuador |
| 77. | Asplundia nonoensis | Asplundia nonoensis | Plants | Ecuador |
| 78. | Asplundia lutea | Asplundia lutea | Plants | Ecuador |
| 79. | Asplundia domingensis | Asplundia domingensis | Plants | Ecuador |
| 80. | Asplundia clementinae | Asplundia clementinae | Plants | Ecuador |
| 81. | Asplundia truncata | Asplundia truncata | Plants | Ecuador |
| 82. | Aster quitensis | Aster quitensis | Plants | Ecuador |
| 83. | Astragalus bidentatus | Astragalus bidentatus | Plants | Ecuador |
| 84. | Atelopus exiguus | Atelopus exiguus | Amphibians | Ecuador |
| 85. | Atelopus nanay | Atelopus nanay | Amphibians | Ecuador |
| 86. | Atelopus onorei | Atelopus onorei | Amphibians | Ecuador |
| 87. | Atelopus petersi | Atelopus petersi | Amphibians | Ecuador |
| 88. | Axinaea sodiroi | Axinaea sodiroi | Plants | Ecuador |
| 89. | Axinaea sessilifolia | Axinaea sessilifolia | Plants | Ecuador |
| 90. | Ayampe Poison Frog | Epipedobates machalilla | Amphibians | Ecuador |
| 91. | Azuay Marsupial Frog | Gastrotheca litonedis | Amphibians | Ecuador |
| 92. | Azuay Stubfoot Toad | Atelopus bomolochos | Amphibians | Ecuador |
| 93. | Bactris setiflora | Bactris setiflora | Plants | Ecuador |
| 94. | Badilloa atrescens | Badilloa atrescens | Plants | Ecuador |
| 95. | Banara riparia | Banara riparia | Plants | Ecuador |
| 96. | Banara regia | Banara regia | Plants | Ecuador |
| 97. | Banded Horned Treefrog | Hemiphractus fasciatus | Amphibians | Colombia, Ecuador, Panama |
| 98. | Bar-winged Wood-wren | Henicorhina leucoptera | Birds | Ecuador, Peru |
| 99. | Barnadesia ciliata | Barnadesia ciliata | Plants | Ecuador |
| 100. | Barrington Land Iguana | Conolophus pallidus | Reptiles | Ecuador (Galapagos Islands) |
| 101. | Bartlettina campii | Bartlettina campii | Plants | Ecuador |
| 102. | Baudo Guan | Penelope ortoni | Birds | Colombia, Ecuador |
| 103. | Bauhinia stenantha | Bauhinia stenantha | Plants | Ecuador |
| 104. | Bauhinia seminarioi | Bauhinia seminarioi | Plants | Ecuador |
| 105. | Bauhinia haughtii | Bauhinia haughtii | Plants | Ecuador |
| 106. | Bauhinia flagelliflora | Bauhinia flagelliflora | Plants | Ecuador |
| 107. | Beautiful Jay | Cyanolyca pulchra | Birds | Colombia, Ecuador |
| 108. | Bedstraw | Galium ecuadoricum | Plants | Ecuador |
| 109. | Bedstraw | Galium fosbergii | Plants | Ecuador |
| 110. | Begonia serotina | Begonia serotina | Plants | Ecuador |
| 111. | Begonia ludwigii | Begonia ludwigii | Plants | Ecuador |
| 112. | Begonia hitchcockii | Begonia hitchcockii | Plants | Ecuador |
| 113. | Begonia harlingii | Begonia harlingii | Plants | Ecuador |
| 114. | Begonia asympeltata | Begonia asympeltata | Plants | Ecuador |
| 115. | Begonia valvata | Begonia valvata | Plants | Ecuador |
| 116. | Begonia aeranthos | Begonia aeranthos | Plants | Ecuador |
| 117. | Begonia tropaeolifolia | Begonia tropaeolifolia | Plants | Ecuador |
| 118. | Begonia triramosa | Begonia triramosa | Plants | Ecuador |
| 119. | Bidens simplicifolia | Bidens simplicifolia | Plants | Ecuador |
| 120. | Black Caiman | Melanosuchus niger | Reptiles | Amazon Basin |
| 121. | Black Solitary Eagle | Harpyhaliaetus solitarius | Birds | Argentina, Bolivia, Colombia, Costa Rica, Ecuador, Guatemala, Honduras, Mexico, Panama, Peru, Venezuela |
| 122. | Black Water Frog | Telmatobius niger | Amphibians | Ecuador |
| 123. | Black-and-white Tanager | Conothraupis speculigera | Birds | Bolivia, Brazil, Ecuador, Peru |
| 124. | Black-breasted Puffleg | Eriocnemis nigrivestis | Birds | Ecuador |
| 125. | Black-thighed Puffleg | Eriocnemis derbyi | Birds | Colombia, Ecuador |
| 126. | Blackish-headed Spinetail | Synallaxis tithys | Birds | Ecuador, Peru |
| 127. | Blakea formicaria | Blakea formicaria | Plants | Ecuador |
| 128. | Blakea eriocalyx | Blakea eriocalyx | Plants | Ecuador |
| 129. | Blakea acostae | Blakea acostae | Plants | Ecuador |
| 130. | Blakea languinosa | Blakea languinosa | Plants | Ecuador |
| 131. | Blakea jativae | Blakea jativae | Plants | Ecuador |
| 132. | Blakea involvens | Blakea involvens | Plants | Ecuador |
| 133. | Blakea incompta | Blakea incompta | Plants | Ecuador |
| 134. | Blechnum floresii | Blechnum floresii | Plants | Ecuador |
| 135. | Bomarea chimborazensis | Bomarea chimborazensis | Plants | Ecuador |
| 136. | Bomarea ceratophora | Bomarea ceratophora | Plants | Ecuador |
| 137. | Bomarea angustifolia | Bomarea angustifolia | Plants | Ecuador |
| 138. | Bomarea uncifolia | Bomarea uncifolia | Plants | Ecuador |
| 139. | Bomarea longipes | Bomarea longipes | Plants | Ecuador |
| 140. | Bomarea hartwegii | Bomarea hartwegii | Plants | Ecuador |
| 141. | Bomarea graminifolia | Bomarea graminifolia | Plants | Ecuador |
| 142. | Bomarea goniocaulon | Bomarea goniocaulon | Plants | Ecuador |
| 143. | Bothriochloa campii | Bothriochloa campii | Plants | Ecuador |
| 144. | Boulenger's Rocket Frog | Hyloxalus vertebralis | Amphibians | Ecuador |
| 145. | Boulenger's Stubfoot Toad | Atelopus boulengeri | Amphibians | Ecuador |
| 146. | Brachyotum trichocalyx | Brachyotum trichocalyx | Plants | Ecuador |
| 147. | Brachyotum rotundifolium | Brachyotum rotundifolium | Plants | Ecuador |
| 148. | Brachyotum ecuadorense | Brachyotum ecuadorense | Plants | Ecuador |
| 149. | Brown Pelican | Pelecanus occidentalis | Birds | Coastal Central and South America, USA (Carolinas to Texas, California, Oregon, Washington), West Indies |
| 150. | Brown-headed Spider Monkey | Ateles fusciceps | Mammals | Colombia, Ecuador, Panama |
| 151. | Browneopsis disepala | Browneopsis disepala | Plants | Ecuador |
| 152. | Browneopsis macrofoliolata | Browneopsis macrofoliolata | Plants | Ecuador |
| 153. | Brunellia zamorensis | Brunellia zamorensis | Plants | Ecuador |
| 154. | Brunellia pauciflora | Brunellia pauciflora | Plants | Ecuador |
| 155. | Brunellia ecuadoriensis | Brunellia ecuadoriensis | Plants | Ecuador |
| 156. | Buddleja ibarrensis | Buddleja ibarrensis | Plants | Ecuador |
| 157. | Buff-throated Tody-tyrant | Hemitriccus rufigularis | Birds | Bolivia, Ecuador, Peru |
| 158. | Burmeistera anderssonii | Burmeistera anderssonii | Plants | Ecuador |
| 159. | Burmeistera oyacachensis | Burmeistera oyacachensis | Plants | Ecuador |
| 160. | Burmeistera ignimontis | Burmeistera ignimontis | Plants | Ecuador |
| 161. | Burmeistera huacamayensis | Burmeistera huacamayensis | Plants | Ecuador |
| 162. | Burmeistera holm-nielsenii | Burmeistera holm-nielsenii | Plants | Ecuador |
| 163. | Burmeistera domingensis | Burmeistera domingensis | Plants | Ecuador |
| 164. | Burmeistera cuyujensis | Burmeistera cuyujensis | Plants | Ecuador |
| 165. | Burmeistera rubrosepala | Burmeistera rubrosepala | Plants | Ecuador |
| 166. | Burmeistera asplundii | Burmeistera asplundii | Plants | Ecuador |
| 167. | Burmeistera resupinata | Burmeistera resupinata | Plants | Ecuador |
| 168. | Burrowes' Giant Glass Frog | Centrolene ballux | Amphibians | Colombia, Ecuador |
| 169. | Bushmint | Hyptis pseudoglauca | Plants | Ecuador |
| 170. | Bushmint | Hyptis florida | Plants | Ecuador |
| 171. | Bushmint | Hyptis diversifolia | Plants | Ecuador |
| 172. | Bushmint | Hyptis argutifolia | Plants | Ecuador |
| 173. | Byttneria obtusata | Byttneria obtusata | Plants | Ecuador |
| 174. | Byttneria minytricha | Byttneria minytricha | Plants | Ecuador |
| 175. | Byttneria loxensis | Byttneria loxensis | Plants | Ecuador |
| 176. | Byttneria flexuosa | Byttneria flexuosa | Plants | Ecuador |
| 177. | Byttneria asplundii | Byttneria asplundii | Plants | Ecuador |
| 178. | Calathea chimboracensis | Calathea chimboracensis | Plants | Ecuador |
| 179. | Calathea anulque | Calathea anulque | Plants | Ecuador |
| 180. | Calathea roseobracteata | Calathea roseobracteata | Plants | Ecuador |
| 181. | Calathea petersenii | Calathea petersenii | Plants | Ecuador |
| 182. | Calathea libbyana | Calathea libbyana | Plants | Ecuador |
| 183. | Calathea ischnosiphonoides | Calathea ischnosiphonoides | Plants | Ecuador |
| 184. | Calathea hagbergii | Calathea hagbergii | Plants | Ecuador |
| 185. | Calathea dodsonii | Calathea dodsonii | Plants | Ecuador |
| 186. | Calea huigrensis | Calea huigrensis | Plants | Ecuador |
| 187. | Cannatella's Plump Toad | Osornophryne talipes | Amphibians | Colombia, Ecuador |
| 188. | Caper Shrub | Capparis heterophylla | Plants | Ecuador |
| 189. | Carapa megistocarpa | Carapa megistocarpa | Plants | Ecuador |
| 190. | Carchi Andes Frog | Hypodactylus brunneus | Amphibians | Colombia, Ecuador |
| 191. | Carchi Andes Toad | Andinophryne colomai | Amphibians | Ecuador |
| 192. | Carchi Rocket Frog | Hyloxalus delatorreae | Amphibians | Ecuador |
| 193. | Carex azuayae | Carex azuayae | Plants | Ecuador |
| 194. | Carex toreadora | Carex toreadora | Plants | Ecuador |
| 195. | Carex tessellata | Carex tessellata | Plants | Ecuador |
| 196. | Carex lepida | Carex lepida | Plants | Ecuador |
| 197. | Carica omnilingua | Carica omnilingua | Plants | Ecuador |
| 198. | Carica horovitziana | Carica horovitziana | Plants | Ecuador |
| 199. | Carlowrightia ecuadoriana | Carlowrightia ecuadoriana | Plants | Ecuador |
| 200. | Casearia mexiae | Casearia mexiae | Plants | Ecuador |
| 201. | Cedrela fissilis | Cedrela fissilis | Plants | Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, Panama, Paraguay, Peru, Venezuela |
| 202. | Central American Tapir | Tapirus bairdii | Mammals | Southern Mexico to Colombia and Ecuador |
| 203. | Centropogon chiltasonensis | Centropogon chiltasonensis | Plants | Ecuador |
| 204. | Centropogon medusa | Centropogon medusa | Plants | Ecuador |
| 205. | Centropogon solisii | Centropogon solisii | Plants | Ecuador |
| 206. | Centropogon cazaletii | Centropogon cazaletii | Plants | Ecuador |
| 207. | Centropogon hirtiflorus | Centropogon hirtiflorus | Plants | Ecuador |
| 208. | Centropogon rubiginosus | Centropogon rubiginosus | Plants | Ecuador |
| 209. | Centropogon brachysiphoniatus | Centropogon brachysiphoniatus | Plants | Ecuador |
| 210. | Centropogon heteropilis | Centropogon heteropilis | Plants | Ecuador |
| 211. | Centropogon rimbachii | Centropogon rimbachii | Plants | Ecuador |
| 212. | Centropogon zamorensis | Centropogon zamorensis | Plants | Ecuador |
| 213. | Centropogon balslevii | Centropogon balslevii | Plants | Ecuador |
| 214. | Centropogon hartwegii | Centropogon hartwegii | Plants | Ecuador |
| 215. | Centropogon pilalensis | Centropogon pilalensis | Plants | Ecuador |
| 216. | Centropogon ursinus | Centropogon ursinus | Plants | Ecuador |
| 217. | Centropogon azuayensis | Centropogon azuayensis | Plants | Ecuador |
| 218. | Centropogon erythraeus | Centropogon erythraeus | Plants | Ecuador |
| 219. | Centropogon phoeniceus | Centropogon phoeniceus | Plants | Ecuador |
| 220. | Centropogon uncinatus | Centropogon uncinatus | Plants | Ecuador |
| 221. | Centropogon albostellatus | Centropogon albostellatus | Plants | Ecuador |
| 222. | Centropogon comosus | Centropogon comosus | Plants | Ecuador |
| 223. | Centropogon parviflorus | Centropogon parviflorus | Plants | Ecuador |
| 224. | Centropogon steyermarkii | Centropogon steyermarkii | Plants | Ecuador |
| 225. | Centropogon aequatorialis | Centropogon aequatorialis | Plants | Ecuador |
| 226. | Centropogon chontalensis | Centropogon chontalensis | Plants | Ecuador |
| 227. | Centropogon occultus | Centropogon occultus | Plants | Ecuador |
| 228. | Centropogon steinii | Centropogon steinii | Plants | Ecuador |
| 229. | Ceroxylon amazonicum | Ceroxylon amazonicum | Plants | Ecuador |
| 230. | Ceroxylon alpinum | Ceroxylon alpinum | Plants | Colombia, Ecuador, Venezuela |
| 231. | Cestrum tipocochense | Cestrum tipocochense | Plants | Ecuador |
| 232. | Cestrum dielsii | Cestrum dielsii | Plants | Ecuador |
| 233. | Cestrum chimborazinum | Cestrum chimborazinum | Plants | Ecuador |
| 234. | Chimbo Rocket Frog | Hyloxalus infraguttatus | Amphibians | Ecuador |
| 235. | Chimborazoa lachnocarpa | Chimborazoa lachnocarpa | Plants | Ecuador |
| 236. | Chlorospatha cutucuensis | Chlorospatha cutucuensis | Plants | Ecuador |
| 237. | Chlorospatha besseae | Chlorospatha besseae | Plants | Ecuador |
| 238. | Choco Broad-nosed Bat | Platyrrhinus chocoensis | Mammals | Colombia, Ecuador |
| 239. | Chuquiraga arcuata | Chuquiraga arcuata | Plants | Ecuador |
| 240. | Cinchona mutisii | Cinchona mutisii | Plants | Ecuador |
| 241. | Cinnamon-breasted Tody-tyrant | Hemitriccus cinnamomeipectus | Birds | Ecuador, Peru |
| 242. | Citharexylum svensonii | Citharexylum svensonii | Plants | Ecuador |
| 243. | Citharexylum quitense | Citharexylum quitense | Plants | Ecuador |
| 244. | Clavija parvula | Clavija parvula | Plants | Ecuador |
| 245. | Clibadium websteri | Clibadium websteri | Plants | Ecuador |
| 246. | Clibadium rhytidophyllum | Clibadium rhytidophyllum | Plants | Ecuador |
| 247. | Clidemia ecuadorensis | Clidemia ecuadorensis | Plants | Ecuador |
| 248. | Clidemia cutucuensis | Clidemia cutucuensis | Plants | Ecuador |
| 249. | Clidemia campii | Clidemia campii | Plants | Ecuador |
| 250. | Clidemia ablusa | Clidemia ablusa | Plants | Ecuador |
| 251. | Clitoria andrei | Clitoria andrei | Plants | Ecuador |
| 252. | Clitoria brachystegia | Clitoria brachystegia | Plants | Ecuador |
| 253. | Clubmoss | Huperzia loxensis | Plants | Ecuador |
| 254. | Clubmoss | Huperzia hastata | Plants | Ecuador |
| 255. | Clusia plurivalvis | Clusia plurivalvis | Plants | Ecuador |
| 256. | Cnidoscolus rangel | Cnidoscolus rangel | Plants | Ecuador |
| 257. | Cnidoscolus matosii | Cnidoscolus matosii | Plants | Ecuador |
| 258. | Cobaea aequatoriensis | Cobaea aequatoriensis | Plants | Ecuador |
| 259. | Cobaea campanulata | Cobaea campanulata | Plants | Ecuador |
| 260. | Collins' Poison Frog | Ranitomeya abdita | Amphibians | Ecuador |
| 261. | Colombian Night Monkey | Aotus lemurinus | Mammals | Colombia, Ecuador, Venezuela |
| 262. | Colombian Walnut | Juglans neotropica | Plants | Colombia, Ecuador, Peru |
| 263. | Common Sawfish | Pristis pristis | Fishes | Africa, Asia, Australia, Central and South America, Europe, Mexico, United States |
| 264. | Connarus ecuadorensis | Connarus ecuadorensis | Plants | Ecuador |
| 265. | Cordia rosei | Cordia rosei | Plants | Ecuador |
| 266. | Cordillera Central Treefrog | Hyloscirtus larinopygion | Amphibians | Colombia, Ecuador |
| 267. | Corytoplectus cutucuensis | Corytoplectus cutucuensis | Plants | Ecuador |
| 268. | Cougar  | Puma concolor | Mammals | North and Central America |
| 269. | Coyote Bush | Baccharis fusca | Plants | Ecuador |
| 270. | Coyote Bush | Baccharis aretioides | Plants | Ecuador |
| 271. | Crab-eating Rat | Ichthyomys hydrobates | Mammals | Colombia, Ecuador, Venezuela |
| 272. | Cremosperma auriculatum | Cremosperma auriculatum | Plants | Ecuador |
| 273. | Crescent-faced Antpitta | Grallaricula lineifrons | Birds | Colombia, Ecuador |
| 274. | Critoniopsis yamboyensis | Critoniopsis yamboyensis | Plants | Ecuador |
| 275. | Critoniopsis dorrii | Critoniopsis dorrii | Plants | Ecuador |
| 276. | Cronquistianthus rosei | Cronquistianthus rosei | Plants | Ecuador |
| 277. | Crossothamnus gentryi | Crossothamnus gentryi | Plants | Ecuador |
| 278. | Ctenitis pallatangana | Ctenitis pallatangana | Plants | Ecuador |
| 279. | Cuatrecasanthus flexipappus | Cuatrecasanthus flexipappus | Plants | Ecuador |
| 280. | Cupania riopalenquensis | Cupania riopalenquensis | Plants | Ecuador |
| 281. | Cuscuta prismatica | Cuscuta prismatica | Plants | Ecuador |
| 282. | Cuyuja Robber Frog | Hypodactylus elassodiscus | Amphibians | Colombia, Ecuador |
| 283. | Cyathea palaciosii | Cyathea palaciosii | Plants | Ecuador |
| 284. | Cyathea heliophila | Cyathea heliophila | Plants | Ecuador |
| 285. | Cynanchum densiflorum | Cynanchum densiflorum | Plants | Ecuador |
| 286. | Cynanchum chanchanense | Cynanchum chanchanense | Plants | Ecuador |
| 287. | Cynanchum campii | Cynanchum campii | Plants | Ecuador |
| 288. | Cynanchum velutinum | Cynanchum velutinum | Plants | Ecuador |
| 289. | Cynanchum spruceanum | Cynanchum spruceanum | Plants | Ecuador |
| 290. | Cynanchum serpyllifolium | Cynanchum serpyllifolium | Plants | Ecuador |
| 291. | Cynanchum jaramilloi | Cynanchum jaramilloi | Plants | Ecuador |
| 292. | Cynanchum intricatum | Cynanchum intricatum | Plants | Ecuador |
| 293. | Cyperus multifolius | Cyperus multifolius | Plants | Ecuador |
| 294. | Dalea chrysophylla | Dalea chrysophylla | Plants | Ecuador |
| 295. | Daphnopsis occulta | Daphnopsis occulta | Plants | Ecuador |
| 296. | Daphnopsis grandis | Daphnopsis grandis | Plants | Ecuador |
| 297. | Dasphyllum lehmannii | Dasphyllum lehmannii | Plants | Ecuador |
| 298. | Dendrophorbium gesnerifolium | Dendrophorbium gesnerifolium | Plants | Ecuador |
| 299. | Dendrophorbium angelense | Dendrophorbium angelense | Plants | Ecuador |
| 300. | Dendrophorbium amplexicaule | Dendrophorbium amplexicaule | Plants | Ecuador |
| 301. | Dendrophthora capillaris | Dendrophthora capillaris | Plants | Ecuador |
| 302. | Dendrophthora variabilis | Dendrophthora variabilis | Plants | Ecuador |
| 303. | Dendrophthora thomasii | Dendrophthora thomasii | Plants | Ecuador |
| 304. | Dendrophthora ovata | Dendrophthora ovata | Plants | Ecuador |
| 305. | Dendrophthora fastigiata | Dendrophthora fastigiata | Plants | Ecuador |
| 306. | Dendrophthora dalstroemii | Dendrophthora dalstroemii | Plants | Ecuador |
| 307. | Dendropsophus gryllatus | Dendropsophus gryllatus | Amphibians | Ecuador |
| 308. | Diastema incisum | Diastema incisum | Plants | Ecuador |
| 309. | Dicliptera dodsonii | Dicliptera dodsonii | Plants | Ecuador |
| 310. | Dicranopygium coma-pyrrhae | Dicranopygium coma-pyrrhae | Plants | Ecuador |
| 311. | Dicranopygium campii | Dicranopygium campii | Plants | Ecuador |
| 312. | Dictyota galapagensis | Dictyota galapagensis | Plants | Ecuador (Galapagos Islands) |
| 313. | Dioscorea choriandra | Dioscorea choriandra | Plants | Ecuador |
| 314. | Dioscorea chimborazensis | Dioscorea chimborazensis | Plants | Ecuador |
| 315. | Diplazium hieronymi | Diplazium hieronymi | Plants | Ecuador |
| 316. | Diplazium avitaguense | Diplazium avitaguense | Plants | Ecuador |
| 317. | Diplazium vesiculosum | Diplazium vesiculosum | Plants | Ecuador |
| 318. | Diplostephium ramiglabrum | Diplostephium ramiglabrum | Plants | Ecuador |
| 319. | Diplostephium juniperinum | Diplostephium juniperinum | Plants | Ecuador |
| 320. | Diplostephium crypteriophyllum | Diplostephium crypteriophyllum | Plants | Ecuador |
| 321. | Disciphania inversa | Disciphania inversa | Plants | Ecuador |
| 322. | Ditaxis macrantha | Ditaxis macrantha | Plants | Ecuador |
| 323. | Draba aretioides | Draba aretioides | Plants | Ecuador |
| 324. | Draba violacea | Draba violacea | Plants | Ecuador |
| 325. | Draba extensa | Draba extensa | Plants | Ecuador |
| 326. | Draba ecuadoriana | Draba ecuadoriana | Plants | Ecuador |
| 327. | Dracontium croatii | Dracontium croatii | Plants | Ecuador |
| 328. | Drymaria stellarioides | Drymaria stellarioides | Plants | Ecuador |
| 329. | Drymonia rhodoloma | Drymonia rhodoloma | Plants | Ecuador |
| 330. | Drymonia laciniosa | Drymonia laciniosa | Plants | Ecuador |
| 331. | Drymonia ecuadorensis | Drymonia ecuadorensis | Plants | Ecuador |
| 332. | Drymonia utuanensis | Drymonia utuanensis | Plants | Ecuador |
| 333. | Duguetia peruviana | Duguetia peruviana | Plants | Ecuador |
| 334. | Dwarf Gentian | Gentianella hirculus | Plants | Ecuador |
| 335. | Dwarf Gentian | Gentianella gracilis | Plants | Ecuador |
| 336. | Dwarf Gentian | Gentianella fuscicaulis | Plants | Ecuador |
| 337. | Dwarf Gentian | Gentianella flaviflora | Plants | Ecuador |
| 338. | Dwarf Gentian | Gentianella androsacea | Plants | Ecuador |
| 339. | Dwarf Gentian | Gentianella polyantha | Plants | Ecuador |
| 340. | Dwarf Gentian | Gentianella longibarbata | Plants | Ecuador |
| 341. | Dwarf Gentian | Gentianella jamesonii | Plants | Ecuador |
| 342. | Ecnomiohyla phantasmagoria | Ecnomiohyla phantasmagoria | Amphibians | Colombia, Ecuador |
| 343. | Ecuadendron acosta-solisianum | Ecuadendron acosta-solisianum | Plants | Ecuador |
| 344. | Ecuador Horned Treefrog | Hemiphractus bubalus | Amphibians | Colombia, Ecuador, Peru |
| 345. | Ecuadorean Grass Mouse | Akodon latebricola | Mammals | Ecuador |
| 346. | Ecuadorian Blue Glass Frog | Cochranella mache | Amphibians | Ecuador |
| 347. | Ecuadorian Sac-winged Bat | Balantiopteryx infusca | Mammals | Colombia, Ecuador |
| 348. | Ecuadorian Tapaculo | Scytalopus robbinsi | Birds | Ecuador |
| 349. | Egletes humifusa | Egletes humifusa | Plants | Ecuador |
| 350. | El Oro Parakeet | Pyrrhura orcesi | Birds | Ecuador |
| 351. | Elaphandra retroflexa | Elaphandra retroflexa | Plants | Ecuador |
| 352. | Elaphandra paucipunctata | Elaphandra paucipunctata | Plants | Ecuador |
| 353. | Elegant Stubfoot Toad | Atelopus elegans | Amphibians | Colombia, Ecuador |
| 354. | Erigeron pauper | Erigeron pauper | Plants | Ecuador |
| 355. | Erigeron adscendens | Erigeron adscendens | Plants | Ecuador |
| 356. | Erythrochiton giganteus | Erythrochiton giganteus | Plants | Ecuador |
| 357. | Erythroxylum ruizii | Erythroxylum ruizii | Plants | Ecuador |
| 358. | Esmeraldas Woodstar | Chaetocercus berlepschi | Birds | Ecuador |
| 359. | Eucharis astrophiala | Eucharis astrophiala | Plants | Ecuador |
| 360. | Eucrosia aurantiaca | Eucrosia aurantiaca | Plants | Ecuador |
| 361. | Eudema nubigena | Eudema nubigena | Plants | Ecuador |
| 362. | Eugenia pustulescens | Eugenia pustulescens | Plants | Ecuador |
| 363. | Eugenia guayaquilensis | Eugenia guayaquilensis | Plants | Ecuador |
| 364. | Eugenia albida | Eugenia albida | Plants | Ecuador |
| 365. | Euphorbia quitensis | Euphorbia quitensis | Plants | Ecuador |
| 366. | Festuca densipaniculata | Festuca densipaniculata | Plants | Ecuador |
| 367. | Filmy Fern | Hymenophyllum tenerum | Plants | Ecuador |
| 368. | Filmy Fern | Hymenophyllum nanum | Plants | Ecuador |
| 369. | Filmy Fern | Hymenophyllum megistocarpum | Plants | Ecuador |
| 370. | Filmy Fern | Hymenophyllum helicoideum | Plants | Ecuador |
| 371. | Filmy Fern | Hymenophyllum contractile | Plants | Ecuador |
| 372. | Fissidens hydropogon | Fissidens hydropogon | Plants | Ecuador |
| 373. | Flightless Cormorant | Phalacrocorax harrisi | Birds | Ecuador |
| 374. | Floreana Coral | Tubastraea floreana | Corals, Jellyfish, and Sea Anemones | Ecuador (Galapagos Islands) |
| 375. | Floreana Mockingbird | Mimus trifasciatus | Birds | Ecuador |
| 376. | Flueggea elliptica | Flueggea elliptica | Plants | Ecuador |
| 377. | Flying Goldfish | Columnea manabiana | Plants | Ecuador |
| 378. | Flying Goldfish | Columnea flexiflora | Plants | Ecuador |
| 379. | Flying Goldfish | Columnea atahualpae | Plants | Ecuador |
| 380. | Flying Goldfish | Columnea asteroloma | Plants | Ecuador |
| 381. | Flying Goldfish | Columnea schimpffii | Plants | Ecuador |
| 382. | Flying Goldfish | Columnea poortmannii | Plants | Ecuador |
| 383. | Francisco | Priogymnanthus apertus | Plants | Ecuador |
| 384. | Fuchsia scherffiana | Fuchsia scherffiana | Plants | Ecuador |
| 385. | Fuchsia hypoleuca | Fuchsia hypoleuca | Plants | Ecuador |
| 386. | Fulvous-dotted Treerunner | Margarornis stellatus | Birds | Colombia, Ecuador |
| 387. | Fungia curvata | Fungia curvata | Corals, Jellyfish, and Sea Anemones | Africa, Asia, Australia, Central America, Middle East, North America, Oceanic, South America |
| 388. | Galapagos Hawk | Buteo galapagoensis | Birds | Ecuador (Galapagos Islands) |
| 389. | Galapagos Islands Fur Seal | Arctocephalus galapagoensis | Mammals | Ecuador (Galapagos Islands) |
| 390. | Galapagos Land Snail | Bulimulus amastroides | Snails | Ecuador (Galapagos Islands) |
| 391. | Galapagos Land Snail | Bulimulus curtus | Snails | Ecuador (Galapagos Islands) |
| 392. | Galapagos Land Snail | Bulimulus habeli | Snails | Ecuador (Galapagos Islands) |
| 393. | Galapagos Land Snail | Bulimulus nesioticus | Snails | Ecuador (Galapagos Islands) |
| 394. | Galapagos Land Snail | Bulimulus rabidensis | Snails | Ecuador (Galapagos Islands) |
| 395. | Galapagos Land Snail | Bulimulus sp. nov. 'nilsodhneri' | Snails | Ecuador (Galapagos Islands) |
| 396. | Galapagos Land Snail | Bulimulus wolfi | Snails | Ecuador (Galapagos Islands) |
| 397. | Galapagos Land Snail | Bulimulus alethorhytidus | Snails | Ecuador (Galapagos Islands) |
| 398. | Galapagos Land Snail | Bulimulus cucullinus | Snails | Ecuador (Galapagos Islands) |
| 399. | Galapagos Land Snail | Bulimulus galapaganus | Snails | Ecuador (Galapagos Islands) |
| 400. | Galapagos Land Snail | Bulimulus lycodus | Snails | Ecuador (Galapagos Islands) |
| 401. | Galapagos Land Snail | Bulimulus planospira | Snails | Ecuador (Galapagos Islands) |
| 402. | Galapagos Land Snail | Bulimulus sp. nov. 'krameri' | Snails | Ecuador (Galapagos Islands) |
| 403. | Galapagos Land Snail | Bulimulus ustulatus | Snails | Ecuador (Galapagos Islands) |
| 404. | Galapagos Land Snail | Bulimulus akamatus | Snails | Ecuador (Galapagos Islands) |
| 405. | Galapagos Land Snail | Bulimulus cinerarius | Snails | Ecuador (Galapagos Islands) |
| 406. | Galapagos Land Snail | Bulimulus eschariferus | Snails | Ecuador (Galapagos Islands) |
| 407. | Galapagos Land Snail | Bulimulus jervisensis | Snails | Ecuador (Galapagos Islands) |
| 408. | Galapagos Land Snail | Bulimulus perspectivus | Snails | Ecuador (Galapagos Islands) |
| 409. | Galapagos Land Snail | Bulimulus sp. nov. 'josevillani' | Snails | Ecuador (Galapagos Islands) |
| 410. | Galapagos Land Snail | Bulimulus unifasciatus | Snails | Ecuador (Galapagos Islands) |
| 411. | Galapagos Land Snail | Bulimulus adserseni | Snails | Ecuador (Galapagos Islands) |
| 412. | Galapagos Land Snail | Bulimulus chemitzioides | Snails | Ecuador (Galapagos Islands) |
| 413. | Galapagos Land Snail | Bulimulus eos | Snails | Ecuador (Galapagos Islands) |
| 414. | Galapagos Land Snail | Bulimulus jacobi | Snails | Ecuador (Galapagos Islands) |
| 415. | Galapagos Land Snail | Bulimulus perrus | Snails | Ecuador (Galapagos Islands) |
| 416. | Galapagos Land Snail | Bulimulus sculpturatus | Snails | Ecuador (Galapagos Islands) |
| 417. | Galapagos Land Snail | Bulimulus tortuganus | Snails | Ecuador (Galapagos Islands) |
| 418. | Galapagos Land Snail | Bulimulus adelphus | Snails | Ecuador (Galapagos Islands) |
| 419. | Galapagos Land Snail | Bulimulus cavagnaroi | Snails | Ecuador (Galapagos Islands) |
| 420. | Galapagos Land Snail | Bulimulus duncanus | Snails | Ecuador (Galapagos Islands) |
| 421. | Galapagos Land Snail | Bulimulus indefatigabilis | Snails | Ecuador (Galapagos Islands) |
| 422. | Galapagos Land Snail | Bulimulus olla | Snails | Ecuador (Galapagos Islands) |
| 423. | Galapagos Land Snail | Bulimulus saeronius | Snails | Ecuador (Galapagos Islands) |
| 424. | Galapagos Land Snail | Bulimulus tanneri | Snails | Ecuador (Galapagos Islands) |
| 425. | Galapagos Land Snail | Bulimulus achatellinus | Snails | Ecuador (Galapagos Islands) |
| 426. | Galapagos Land Snail | Bulimulus calvus | Snails | Ecuador (Galapagos Islands) |
| 427. | Galapagos Land Snail | Bulimulus deridderi | Snails | Ecuador (Galapagos Islands) |
| 428. | Galapagos Land Snail | Bulimulus hoodensis | Snails | Ecuador (Galapagos Islands) |
| 429. | Galapagos Land Snail | Bulimulus ochsneri | Snails | Ecuador (Galapagos Islands) |
| 430. | Galapagos Land Snail | Bulimulus rugulosus | Snails | Ecuador (Galapagos Islands) |
| 431. | Galapagos Land Snail | Bulimulus sp. nov. 'vanmoli' | Snails | Ecuador (Galapagos Islands) |
| 432. | Galapagos Land Snail | Bulimulus blombergi | Snails | Ecuador (Galapagos Islands) |
| 433. | Galapagos Land Snail | Bulimulus darwini | Snails | Ecuador (Galapagos Islands) |
| 434. | Galapagos Land Snail | Bulimulus hirsutus | Snails | Ecuador (Galapagos Islands) |
| 435. | Galapagos Land Snail | Bulimulus nux | Snails | Ecuador (Galapagos Islands) |
| 436. | Galapagos Land Snail | Bulimulus reibischi | Snails | Ecuador (Galapagos Islands) |
| 437. | Galapagos Land Snail | Bulimulus sp. nov. 'tuideroyi' | Snails | Ecuador (Galapagos Islands) |
| 438. | Galapagos Marine Iguana | Amblyrhynchus cristatus | Reptiles | Ecuador (Galapagos Islands) |
| 439. | Galapagos Penguin | Spheniscus mendiculus | Birds | Ecuador (Galapagos Islands) |
| 440. | Galapagos Petrel | Pterodroma phaeopygia | Birds | Colombia, Costa Rica, Ecuador, Guatemala, Mexico, Nicaragua, Panama |
| 441. | Galapagos Rice Rat | Aegialomys galapagoensis | Mammals | Ecuador (Galapagos Islands) |
| 442. | Galapagos Sea Lion | Zalophus wollebaeki | Mammals | Colombia, Costa Rica, Ecuador |
| 443. | Galapagos Stringweed | Bifurcaria galapagensis | Plants | Ecuador (Galapagos Islands) |
| 444. | Galapagos Tortoise | Geochelone elephantopus | Reptiles | Ecuador (Galapagos Islands) |
| 445. | Galaxaura barbata | Galaxaura barbata | Plants | Ecuador |
| 446. | Gasteranthus bilsaensis | Gasteranthus bilsaensis | Plants | Ecuador |
| 447. | Gasteranthus perennis | Gasteranthus perennis | Plants | Ecuador |
| 448. | Gasteranthus atratus | Gasteranthus atratus | Plants | Ecuador |
| 449. | Gasteranthus orientandinus | Gasteranthus orientandinus | Plants | Ecuador |
| 450. | Gasteranthus mutabilis | Gasteranthus mutabilis | Plants | Ecuador |
| 451. | Gasteranthus macrocalyx | Gasteranthus macrocalyx | Plants | Ecuador |
| 452. | Gasteranthus extinctus | Gasteranthus extinctus | Plants | Ecuador |
| 453. | Gasteranthus timidus | Gasteranthus timidus | Plants | Ecuador |
| 454. | Gasteranthus crispus | Gasteranthus crispus | Plants | Ecuador |
| 455. | Gasteranthus ternatus | Gasteranthus ternatus | Plants | Ecuador |
| 456. | Gasteranthus carinatus | Gasteranthus carinatus | Plants | Ecuador |
| 457. | Gasteranthus tenellus | Gasteranthus tenellus | Plants | Ecuador |
| 458. | Geissanthus pinchinchana | Geissanthus pinchinchana | Plants | Ecuador |
| 459. | Geissanthus fallenae | Geissanthus fallenae | Plants | Ecuador |
| 460. | Geonoma irena | Geonoma irena | Plants | Ecuador |
| 461. | Geranium exallum | Geranium exallum | Plants | Ecuador |
| 462. | Geranium antisanae | Geranium antisanae | Plants | Ecuador |
| 463. | Giant Armadillo | Priodontes maximus | Mammals | Guyana to Argentina, Venezuela |
| 464. | Giant Otter | Pteronura brasiliensis | Mammals | South America |
| 465. | Gnaphalium sodiroi | Gnaphalium sodiroi | Plants | Ecuador |
| 466. | Gnaphalium sepositum | Gnaphalium sepositum | Plants | Ecuador |
| 467. | Gnaphalium ecuadorense | Gnaphalium ecuadorense | Plants | Ecuador |
| 468. | Goeldi's Marmoset | Callimico goeldii | Mammals | Bolivia, Brazil, Colombia, Ecuador, Peru |
| 469. | Goliath Grouper | Epinephelus itajara | Fishes | Africa, Central and South America, Mexico, United States (Florida, Minor Outlying Islands) |
| 470. | Gonolobus campii | Gonolobus campii | Plants | Ecuador |
| 471. | Gonzalagunia mollis | Gonzalagunia mollis | Plants | Ecuador |
| 472. | Gonzalagunia dodsonii | Gonzalagunia dodsonii | Plants | Ecuador |
| 473. | Gonzalagunia bifida | Gonzalagunia bifida | Plants | Ecuador |
| 474. | Gracilaria skottsbergii | Gracilaria skottsbergii | Plants | Ecuador |
| 475. | Grammitis basalis | Grammitis basalis | Plants | Ecuador |
| 476. | Gray-backed Hawk | Leucopternis occidentalis | Birds | Ecuador, Peru |
| 477. | Gray-bellied Shrew Opossum | Caenolestes caniventer | Mammals | Ecuador, Peru |
| 478. | Gray-cheeked Parakeet | Brotogeris pyrrhoptera | Birds | Ecuador, Peru |
| 479. | Great Curassow | Crax rubra | Birds | Belize, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama |
| 480. | Great Green Macaw | Ara ambiguus | Birds | Colombia, Costa Rica, Ecuador, Honduras, Nicaragua, Panama |
| 481. | Greater Scythebill | Campylorhamphus pucherani | Birds | Colombia, Ecuador, Peru |
| 482. | Grey-breasted Mountain-toucan | Andigena hypoglauca | Birds | Colombia, Ecuador, Peru |
| 483. | Grias longirachis | Grias longirachis | Plants | Ecuador |
| 484. | Grosvenoria campii | Grosvenoria campii | Plants | Ecuador |
| 485. | Guacamayo Plump Toad | Osornophryne guacamayo | Amphibians | Colombia, Ecuador |
| 486. | Gualecenita Stubfoot Toad | Atelopus nepiozomus | Amphibians | Ecuador |
| 487. | Guanujo Stubfoot Toad | Atelopus guanujo | Amphibians | Ecuador |
| 488. | Guatteria pastazae | Guatteria pastazae | Plants | Ecuador |
| 489. | Guatteria occidentalis | Guatteria occidentalis | Plants | Ecuador |
| 490. | Guatteria microcarpa | Guatteria microcarpa | Plants | Ecuador |
| 491. | Guatteria sodiroi | Guatteria sodiroi | Plants | Ecuador |
| 492. | Guayaquil Woodpecker | Campephilus gayaquilensis | Birds | Colombia, Ecuador, Peru |
| 493. | Guevaria loxensis | Guevaria loxensis | Plants | Ecuador |
| 494. | Gustavia serrata | Gustavia serrata | Plants | Ecuador |
| 495. | Gustavia dodsonii | Gustavia dodsonii | Plants | Ecuador |
| 496. | Guzmania alcantareoides | Guzmania alcantareoides | Plants | Ecuador |
| 497. | Guzmania osyana | Guzmania osyana | Plants | Ecuador |
| 498. | Guzmania albescens | Guzmania albescens | Plants | Ecuador |
| 499. | Guzmania lepidota | Guzmania lepidota | Plants | Ecuador |
| 500. | Guzmania henniae | Guzmania henniae | Plants | Ecuador |
| 501. | Guzmania fuquae | Guzmania fuquae | Plants | Ecuador |
| 502. | Guzmania striata | Guzmania striata | Plants | Ecuador |
| 503. | Guzmania fuerstenbergiana | Guzmania fuerstenbergiana | Plants | Ecuador |
| 504. | Guzmania rubrolutea | Guzmania rubrolutea | Plants | Ecuador |
| 505. | Guzmania ecuadorensis | Guzmania ecuadorensis | Plants | Ecuador |
| 506. | Guzmania roseiflora | Guzmania roseiflora | Plants | Ecuador |
| 507. | Guzmania condorensis | Guzmania condorensis | Plants | Ecuador |
| 508. | Guzmania poortmanii | Guzmania poortmanii | Plants | Ecuador |
| 509. | Gynoxys ignaciana | Gynoxys ignaciana | Plants | Ecuador |
| 510. | Gynoxys chagalensis | Gynoxys chagalensis | Plants | Ecuador |
| 511. | Gynoxys campii | Gynoxys campii | Plants | Ecuador |
| 512. | Gynoxys validifolia | Gynoxys validifolia | Plants | Ecuador |
| 513. | Halenia serpyllifolia | Halenia serpyllifolia | Plants | Ecuador |
| 514. | Hammerhead Shark | Sphyrna mokarran | Fishes | Africa, Asia, Australia, Central and South America, Middle East, Oceanic, United States |
| 515. | Hammond's Rice Rat | Mindomys hammondi | Mammals | Ecuador |
| 516. | Handley's Tailless Bat | Anoura cultrata | Mammals | Bolivia, Colombia, Costa Rica, Ecuador, Panama, Peru, Venezuela |
| 517. | Haplopappus albicans | Haplopappus albicans | Plants | Ecuador |
| 518. | Harmles Serotine | Eptesicus innoxius | Mammals | Ecuador (Galapagos Islands), Peru |
| 519. | Harpy Eagle  | Harpia harpyja | Birds | Mexico south to Argentina |
| 520. | Heisteria cyathiformis | Heisteria cyathiformis | Plants | Ecuador |
| 521. | Hernandia lychnifera | Hernandia lychnifera | Plants | Ecuador |
| 522. | Herrania balaensis | Herrania balaensis | Plants | Ecuador |
| 523. | Hieracium debile | Hieracium debile | Plants | Ecuador |
| 524. | Hirtella pauciflora | Hirtella pauciflora | Plants | Ecuador |
| 525. | Hoary Puffleg | Haplophaedia lugens | Birds | Colombia, Ecuador |
| 526. | Hoffmannia ecuatoriana | Hoffmannia ecuatoriana | Plants | Ecuador |
| 527. | Horned Marsupial Frog | Gastrotheca cornuta | Amphibians | Colombia, Costa Rica, Ecuador, Panama |
| 528. | Hyalinobatrachium pellucidum | Hyalinobatrachium pellucidum | Amphibians | Ecuador |
| 529. | Hypericum prietoi | Hypericum prietoi | Plants | Ecuador |
| 530. | Hypericum hartwegii | Hypericum hartwegii | Plants | Ecuador |
| 531. | Hypericum asplundii | Hypericum asplundii | Plants | Ecuador |
| 532. | Hypolobocera rathbuni | Hypolobocera rathbuni | Crustaceans | Ecuador |
| 533. | Hypolobocera gracilignatha | Hypolobocera gracilignatha | Crustaceans | Ecuador, Peru |
| 534. | Hypolobocera exuca | Hypolobocera exuca | Crustaceans | Colombia, Ecuador |
| 535. | Idiopappus saloyensis | Idiopappus saloyensis | Plants | Ecuador |
| 536. | Imperial Snipe | Gallinago imperialis | Birds | Ecuador, Peru |
| 537. | Inca Tern | Larosterna inca | Birds | Chile, Colombia, Ecuador, Peru |
| 538. | Inga multicaulis | Inga multicaulis | Plants | Ecuador |
| 539. | Inga jaunechensis | Inga jaunechensis | Plants | Ecuador |
| 540. | Inga carinata | Inga carinata | Plants | Ecuador |
| 541. | Irenella chrysotricha | Irenella chrysotricha | Plants | Ecuador |
| 542. | Jaguar  | Panthera onca | Mammals | Arizona, California, Central and South America, Louisiana, Mexico, New Mexico, Texas |
| 543. | Jatropha nudicaulis | Jatropha nudicaulis | Plants | Ecuador |
| 544. | Jocotoco Antpitta | Grallaria ridgelyi | Birds | Ecuador, Peru |
| 545. | Jondachi Treefrog | Hyloscirtus staufferorum | Amphibians | Ecuador |
| 546. | Joosia standleyana | Joosia standleyana | Plants | Ecuador |
| 547. | Joosia aequatoria | Joosia aequatoria | Plants | Ecuador |
| 548. | Joseanthus chimborazensis | Joseanthus chimborazensis | Plants | Ecuador |
| 549. | Joseanthus cuatrecasasii | Joseanthus cuatrecasasii | Plants | Ecuador |
| 550. | Jungia glandulifera | Jungia glandulifera | Plants | Ecuador |
| 551. | Jungia crenatifolia | Jungia crenatifolia | Plants | Ecuador |
| 552. | Kaunia pachanoi | Kaunia pachanoi | Plants | Ecuador |
| 553. | Kingianthus paradoxus | Kingianthus paradoxus | Plants | Ecuador |
| 554. | Klarobelia megalocarpa | Klarobelia megalocarpa | Plants | Ecuador |
| 555. | Klarobelia lucida | Klarobelia lucida | Plants | Ecuador |
| 556. | Ladenbergia rubiginosa | Ladenbergia rubiginosa | Plants | Ecuador |
| 557. | Larnax steyermarkii | Larnax steyermarkii | Plants | Ecuador |
| 558. | Laurencia oppositocladia | Laurencia oppositocladia | Plants | Ecuador (Galapagos Islands) |
| 559. | Leafflower | Phyllanthus sponiaefolius | Plants | Ecuador |
| 560. | Leafflower | Phyllanthus millei | Plants | Ecuador |
| 561. | Leafflower | Phyllanthus haughtii | Plants | Ecuador |
| 562. | Least Tern | Sterna antillarum | Birds | Bahamas, Central America (winters), Greater and Lesser Antilles, Mexico, Northern South America, USA (California, including the Miss. R. Basin), Atlantic Gulf Coasts |
| 563. | Lehmann's Rocket Frog | Hyloxalus lehmanni | Amphibians | Colombia, Ecuador |
| 564. | Lemna ecuadoriensis | Lemna ecuadoriensis | Plants | Ecuador |
| 565. | Lepidaploa violiceps | Lepidaploa violiceps | Plants | Ecuador |
| 566. | Lepidopilum grevilleanum | Lepidopilum grevilleanum | Plants | Ecuador |
| 567. | Licania megalophylla | Licania megalophylla | Plants | Ecuador |
| 568. | Licania longicuspidata | Licania longicuspidata | Plants | Ecuador |
| 569. | Lindacatalina sumacensis | Lindacatalina sumacensis | Crustaceans | Colombia, Ecuador |
| 570. | Linum cratericola | Linum cratericola | Plants | Ecuador (Galapagos Islands) |
| 571. | Little Spotted Cat | Leopardus tigrinus | Mammals | Costa Rica to Northern Argentina |
| 572. | Llerasia fuliginea | Llerasia fuliginea | Plants | Ecuador |
| 573. | Lobelia subpubera | Lobelia subpubera | Plants | Ecuador |
| 574. | Lobelia collina | Lobelia collina | Plants | Ecuador |
| 575. | Loja Rocket Frog | Hyloxalus elachyhistus | Amphibians | Ecuador, Peru |
| 576. | Loja Water Frog | Telmatobius cirrhacelis | Amphibians | Ecuador |
| 577. | Lonchophylla concava | Lonchophylla concava | Mammals | Colombia, Costa Rica, Ecuador, Panama |
| 578. | Long-haired Spider Monkey | Ateles belzebuth | Mammals | Brazil, Colombia, Ecuador, Peru, Venezuela |
| 579. | Long-tailed Otter | Lontra longicaudis | Mammals | South America |
| 580. | Loricaria azuayensis | Loricaria azuayensis | Plants | Ecuador |
| 581. | Lupinus nubigenus | Lupinus nubigenus | Plants | Ecuador |
| 582. | Lycianthes rimbachii | Lycianthes rimbachii | Plants | Ecuador |
| 583. | Lycoseris eggersii | Lycoseris eggersii | Plants | Ecuador |
| 584. | Lynch's Giant Glass Frog | Centrolene lynchi | Amphibians | Colombia, Ecuador |
| 585. | Lynch's Stubfoot Toad | Atelopus lynchi | Amphibians | Ecuador |
| 586. | Lysipomia rhizomata | Lysipomia rhizomata | Plants | Ecuador |
| 587. | Lysipomia lehmannii | Lysipomia lehmannii | Plants | Ecuador |
| 588. | Lysipomia laricina | Lysipomia laricina | Plants | Ecuador |
| 589. | Lysipomia cylindrocarpa | Lysipomia cylindrocarpa | Plants | Ecuador |
| 590. | Lysipomia vitreola | Lysipomia vitreola | Plants | Ecuador |
| 591. | Lysipomia cuspidata | Lysipomia cuspidata | Plants | Ecuador |
| 592. | Lysipomia tubulosa | Lysipomia tubulosa | Plants | Ecuador |
| 593. | Lysipomia crassomarginata | Lysipomia crassomarginata | Plants | Ecuador |
| 594. | Lysipomia speciosa | Lysipomia speciosa | Plants | Ecuador |
| 595. | Lysipomia bilineata | Lysipomia bilineata | Plants | Ecuador |
| 596. | Lysipomia sparrei | Lysipomia sparrei | Plants | Ecuador |
| 597. | Lysipomia aretioides | Lysipomia aretioides | Plants | Ecuador |
| 598. | Maiden Fern | Thelypteris macra | Plants | Ecuador |
| 599. | Maiden Fern | Thelypteris bonapartii | Plants | Ecuador |
| 600. | Mandevilla dodsonii | Mandevilla dodsonii | Plants | Ecuador |
| 601. | Mandevilla jamesonii | Mandevilla jamesonii | Plants | Ecuador |
| 602. | Mandevilla equatorialis | Mandevilla equatorialis | Plants | Ecuador |
| 603. | Manettia skutchii | Manettia skutchii | Plants | Ecuador |
| 604. | Manettia nebulosa | Manettia nebulosa | Plants | Ecuador |
| 605. | Manettia holwayi | Manettia holwayi | Plants | Ecuador |
| 606. | Manettia canescens | Manettia canescens | Plants | Ecuador |
| 607. | Manettia angamarcensis | Manettia angamarcensis | Plants | Ecuador |
| 608. | Manettia teresitae | Manettia teresitae | Plants | Ecuador |
| 609. | Mangrove Finch | Camarhynchus heliobates | Birds | Ecuador |
| 610. | Mantled Howler Monkey  | Alouatta palliata | Mammals | Mexico to South America |
| 611. | Marcgravia grandifolia | Marcgravia grandifolia | Plants | Ecuador |
| 612. | Marcgraviastrum sodiroi | Marcgraviastrum sodiroi | Plants | Ecuador |
| 613. | Margay  | Leopardus wiedii | Mammals | Central and South America, Mexico |
| 614. | Markea fosbergii | Markea fosbergii | Plants | Ecuador |
| 615. | Mascagnia haenkeana | Mascagnia haenkeana | Plants | Ecuador |
| 616. | Matisia palenquiana | Matisia palenquiana | Plants | Ecuador |
| 617. | Matisia grandifolia | Matisia grandifolia | Plants | Ecuador |
| 618. | Matisia coloradorum | Matisia coloradorum | Plants | Ecuador |
| 619. | Matisia alata | Matisia alata | Plants | Ecuador |
| 620. | Mauria membranifolia | Mauria membranifolia | Plants | Ecuador |
| 621. | Maytenus eggersii | Maytenus eggersii | Plants | Ecuador |
| 622. | Maytenus manabiensis | Maytenus manabiensis | Plants | Ecuador |
| 623. | Maytenus jamesonii | Maytenus jamesonii | Plants | Ecuador |
| 624. | Meliosma littlei | Meliosma littlei | Plants | Ecuador |
| 625. | Melpomene brevipes | Melpomene brevipes | Plants | Ecuador |
| 626. | Meriania campii | Meriania campii | Plants | Ecuador |
| 627. | Meriania ampla | Meriania ampla | Plants | Ecuador |
| 628. | Meriania acostae | Meriania acostae | Plants | Ecuador |
| 629. | Meriania stellata | Meriania stellata | Plants | Ecuador |
| 630. | Meriania maguirei | Meriania maguirei | Plants | Ecuador |
| 631. | Meriania loxensis | Meriania loxensis | Plants | Ecuador |
| 632. | Meriania costata | Meriania costata | Plants | Ecuador |
| 633. | Metalepis haughtii | Metalepis haughtii | Plants | Ecuador |
| 634. | Metalepis gentryi | Metalepis gentryi | Plants | Ecuador |
| 635. | Metastelma purpurascens | Metastelma purpurascens | Plants | Ecuador |
| 636. | Mezobromelia fulgens | Mezobromelia fulgens | Plants | Ecuador |
| 637. | Miconia ledifolia | Miconia ledifolia | Plants | Ecuador |
| 638. | Miconia ombrophila | Miconia ombrophila | Plants | Ecuador |
| 639. | Miconia scabra | Miconia scabra | Plants | Ecuador |
| 640. | Miconia benoistii | Miconia benoistii | Plants | Ecuador |
| 641. | Miconia espinosae | Miconia espinosae | Plants | Ecuador |
| 642. | Miconia leandroides | Miconia leandroides | Plants | Ecuador |
| 643. | Miconia oligantha | Miconia oligantha | Plants | Ecuador |
| 644. | Miconia prominens | Miconia prominens | Plants | Ecuador |
| 645. | Miconia beneolens | Miconia beneolens | Plants | Ecuador |
| 646. | Miconia dodsonii | Miconia dodsonii | Plants | Ecuador |
| 647. | Miconia inanis | Miconia inanis | Plants | Ecuador |
| 648. | Miconia nasella | Miconia nasella | Plants | Ecuador |
| 649. | Miconia prietoi | Miconia prietoi | Plants | Ecuador |
| 650. | Miconia barbipilis | Miconia barbipilis | Plants | Ecuador |
| 651. | Miconia cutucuensis | Miconia cutucuensis | Plants | Ecuador |
| 652. | Miconia hirsutivena | Miconia hirsutivena | Plants | Ecuador |
| 653. | Miconia medusa | Miconia medusa | Plants | Ecuador |
| 654. | Miconia pilaloensis | Miconia pilaloensis | Plants | Ecuador |
| 655. | Miconia aspratilis | Miconia aspratilis | Plants | Ecuador |
| 656. | Miconia cuprea | Miconia cuprea | Plants | Ecuador |
| 657. | Miconia guayaquilensis | Miconia guayaquilensis | Plants | Ecuador |
| 658. | Miconia macbrydeana | Miconia macbrydeana | Plants | Ecuador |
| 659. | Miconia pausana | Miconia pausana | Plants | Ecuador |
| 660. | Miconia asplundii | Miconia asplundii | Plants | Ecuador |
| 661. | Miconia corazonica | Miconia corazonica | Plants | Ecuador |
| 662. | Miconia glyptophylla | Miconia glyptophylla | Plants | Ecuador |
| 663. | Miconia longisetosa | Miconia longisetosa | Plants | Ecuador |
| 664. | Miconia pailasana | Miconia pailasana | Plants | Ecuador |
| 665. | Miconia villonacensis | Miconia villonacensis | Plants | Ecuador |
| 666. | Miconia ascendens | Miconia ascendens | Plants | Ecuador |
| 667. | Miconia collayensis | Miconia collayensis | Plants | Ecuador |
| 668. | Miconia fuliginosa | Miconia fuliginosa | Plants | Ecuador |
| 669. | Miconia littlei | Miconia littlei | Plants | Ecuador |
| 670. | Miconia onaensis | Miconia onaensis | Plants | Ecuador |
| 671. | Miconia vesca | Miconia vesca | Plants | Ecuador |
| 672. | Miconia castrensis | Miconia castrensis | Plants | Ecuador |
| 673. | Miconia fosbergii | Miconia fosbergii | Plants | Ecuador |
| 674. | Mikania pulverulenta | Mikania pulverulenta | Plants | Ecuador |
| 675. | Mikania millei | Mikania millei | Plants | Ecuador |
| 676. | Mikania jamesonii | Mikania jamesonii | Plants | Ecuador |
| 677. | Mikania iserniana | Mikania iserniana | Plants | Ecuador |
| 678. | Mikania andrei | Mikania andrei | Plants | Ecuador |
| 679. | Mikania tafallana | Mikania tafallana | Plants | Ecuador |
| 680. | Mikania stereolepis | Mikania stereolepis | Plants | Ecuador |
| 681. | Mikania seemannii | Mikania seemannii | Plants | Ecuador |
| 682. | Milkvine | Matelea honorana | Plants | Ecuador |
| 683. | Milkvine | Matelea fimbriatiflora | Plants | Ecuador |
| 684. | Milkvine | Matelea ecuadorensis | Plants | Ecuador |
| 685. | Milkvine | Matelea chimboracensis | Plants | Ecuador |
| 686. | Milkvine | Matelea sprucei | Plants | Ecuador |
| 687. | Milkvine | Matelea orthoneura | Plants | Ecuador |
| 688. | Milkwort | Polygala quitensis | Plants | Ecuador |
| 689. | Mimosa townsendii | Mimosa townsendii | Plants | Ecuador |
| 690. | Mimosa loxensis | Mimosa loxensis | Plants | Ecuador |
| 691. | Mimosa disperma | Mimosa disperma | Plants | Ecuador |
| 692. | Mindo Stubfoot Toad | Atelopus mindoensis | Amphibians | Ecuador |
| 693. | Monactis dubia | Monactis dubia | Plants | Ecuador |
| 694. | Monactis anderssonii | Monactis anderssonii | Plants | Ecuador |
| 695. | Monnina sodiroana | Monnina sodiroana | Plants | Ecuador |
| 696. | Monnina haughtii | Monnina haughtii | Plants | Ecuador |
| 697. | Monopyle stenoloba | Monopyle stenoloba | Plants | Ecuador |
| 698. | Monopyle sodiroana | Monopyle sodiroana | Plants | Ecuador |
| 699. | Monopyle paniculata | Monopyle paniculata | Plants | Ecuador |
| 700. | Monotagma rudanii | Monotagma rudanii | Plants | Ecuador |
| 701. | Monticalia angustifolia | Monticalia angustifolia | Plants | Ecuador |
| 702. | Morona-Santiago Stubfoot Toad | Atelopus halihelos | Amphibians | Ecuador |
| 703. | Mosannona pacifica | Mosannona pacifica | Plants | Ecuador |
| 704. | Mountain Paca | Cuniculus taczanowskii | Mammals | Bolivia, Colombia, Ecuador, Peru, Venezuela |
| 705. | Mountain Tapir | Tapirus pinchaque | Mammals | Colombia, Ecuador and possibly Peru and Venezuela |
| 706. | Muhlenbergia palmirensis | Muhlenbergia palmirensis | Plants | Ecuador |
| 707. | Munnozia canarensis | Munnozia canarensis | Plants | Ecuador |
| 708. | Mutisia microneura | Mutisia microneura | Plants | Ecuador |
| 709. | Mutisia lehmannii | Mutisia lehmannii | Plants | Ecuador |
| 710. | Mutisia hieronymi | Mutisia hieronymi | Plants | Ecuador |
| 711. | Myrcia fasciata | Myrcia fasciata | Plants | Ecuador |
| 712. | Myrcianthes irregularis | Myrcianthes irregularis | Plants | Ecuador |
| 713. | Myriocolea irrorata | Myriocolea irrorata | Plants | Ecuador |
| 714. | Myriogramme kylinii | Myriogramme kylinii | Plants | Ecuador (Galapagos Islands) |
| 715. | Napo Giant Glass Frog | Centrolene audax | Amphibians | Ecuador |
| 716. | Napo Plump Toad | Osornophryne antisana | Amphibians | Ecuador |
| 717. | Napo Sabrewing | Campylopterus villaviscensio | Birds | Colombia, Ecuador, Peru |
| 718. | Napo Stubfoot Toad | Atelopus planispina | Amphibians | Ecuador |
| 719. | Nasa profundilobata | Nasa profundilobata | Plants | Ecuador |
| 720. | Nasa peltata | Nasa peltata | Plants | Ecuador |
| 721. | Nasa ferox | Nasa ferox | Plants | Ecuador |
| 722. | Nasa connectans | Nasa connectans | Plants | Ecuador |
| 723. | Nasa aequatoriana | Nasa aequatoriana | Plants | Ecuador |
| 724. | Nectandra fragrans | Nectandra fragrans | Plants | Ecuador |
| 725. | Nectandra cerifolia | Nectandra cerifolia | Plants | Ecuador |
| 726. | Neurolepis elata | Neurolepis elata | Plants | Ecuador |
| 727. | Nierembergia espinosae | Nierembergia espinosae | Plants | Ecuador |
| 728. | Niphogeton sprucei | Niphogeton sprucei | Plants | Ecuador |
| 729. | North Andean Huemul | Hippocamelus antisensis | Mammals | Argentina, Bolivia, Chile, Ecuador, Peru |
| 730. | North Shore Marsupial Frog | Gastrotheca espeletia | Amphibians | Colombia, Ecuador |
| 731. | Nymphargus megacheirus | Nymphargus megacheirus | Amphibians | Colombia, Ecuador |
| 732. | Nymphargus laurae | Nymphargus laurae | Amphibians | Ecuador |
| 733. | Nymphargus anomalus | Nymphargus anomalus | Amphibians | Ecuador |
| 734. | Ocelot  | Leopardus pardalis | Mammals | USA (Arizona, Texas) to Central and South America |
| 735. | Ocotea pachypoda | Ocotea pachypoda | Plants | Ecuador |
| 736. | Odontocarya perforata | Odontocarya perforata | Plants | Ecuador |
| 737. | Odontonema laxum | Odontonema laxum | Plants | Ecuador |
| 738. | Olive Grouper | Epinephelus cifuentesi | Fishes | Colombia, Costa Rica, Ecuador |
| 739. | Orange-fronted Barbet | Capito squamatus | Birds | Colombia, Ecuador |
| 740. | Oreopanax lehmannii | Oreopanax lehmannii | Plants | Ecuador |
| 741. | Oreopanax impolitus | Oreopanax impolitus | Plants | Ecuador |
| 742. | Oreopanax corazonensis | Oreopanax corazonensis | Plants | Ecuador |
| 743. | Oritrophium tergoalbum | Oritrophium tergoalbum | Plants | Ecuador |
| 744. | Oro Phantasmal Poison Frog | Epipedobates anthonyi | Amphibians | Ecuador, Peru |
| 745. | Ossaea palenquensis | Ossaea palenquensis | Plants | Ecuador |
| 746. | Ossaea incerta | Ossaea incerta | Plants | Ecuador |
| 747. | Otholobium holosericeum | Otholobium holosericeum | Plants | Ecuador |
| 748. | Palanda Rocket Frog | Hyloxalus cevallosi | Amphibians | Ecuador |
| 749. | Pale-browed Tinamou | Crypturellus transfasciatus | Birds | Ecuador, Peru |
| 750. | Pale-headed Brush-finch | Atlapetes pallidiceps | Birds | Ecuador |
| 751. | Palicourea fuchsioides | Palicourea fuchsioides | Plants | Ecuador |
| 752. | Palicourea heilbornii | Palicourea heilbornii | Plants | Ecuador |
| 753. | Palo De Las Siete Vueltas | Calliandra glyphoxylon | Plants | Ecuador |
| 754. | Pampas Cat | Leopardus colocolo | Mammals | Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay, Peru, Uruguay |
| 755. | Pampas Giant Glass Frog | Centrolene gemmatum | Amphibians | Ecuador |
| 756. | Panicum acostia | Panicum acostia | Plants | Ecuador |
| 757. | Papallacta Marsupial Frog | Gastrotheca orophylax | Amphibians | Colombia, Ecuador |
| 758. | Papallacta Treefrog | Hyloscirtus psarolaimus | Amphibians | Colombia, Ecuador |
| 759. | Pappobolus argenteus | Pappobolus argenteus | Plants | Ecuador |
| 760. | Paradrymonia lacera | Paradrymonia lacera | Plants | Ecuador |
| 761. | Paradrymonia hypocyrta | Paradrymonia hypocyrta | Plants | Ecuador |
| 762. | Paradrymonia binata | Paradrymonia binata | Plants | Ecuador |
| 763. | Parathesis eggersiana | Parathesis eggersiana | Plants | Ecuador |
| 764. | Paspalum soboliferum | Paspalum soboliferum | Plants | Ecuador |
| 765. | Paspalum azuayense | Paspalum azuayense | Plants | Ecuador |
| 766. | Passionflower | Passiflora loxensis | Plants | Ecuador |
| 767. | Passionflower | Passiflora linda | Plants | Ecuador |
| 768. | Passionflower | Passiflora harlingii | Plants | Ecuador |
| 769. | Passionflower | Passiflora discophora | Plants | Ecuador |
| 770. | Passionflower | Passiflora zamorana | Plants | Ecuador |
| 771. | Passionflower | Passiflora brachyantha | Plants | Ecuador |
| 772. | Passionflower | Passiflora subpurpurea | Plants | Ecuador |
| 773. | Passionflower | Passiflora anfracta | Plants | Ecuador |
| 774. | Passionflower | Passiflora montana | Plants | Ecuador |
| 775. | Passionflower | Passiflora andina | Plants | Ecuador |
| 776. | Passionflower | Passiflora luzmarina | Plants | Ecuador |
| 777. | Pearcea intermedia | Pearcea intermedia | Plants | Ecuador |
| 778. | Pearcea gracilis | Pearcea gracilis | Plants | Ecuador |
| 779. | Pearcea bilabiata | Pearcea bilabiata | Plants | Ecuador |
| 780. | Pentacalia riotintis | Pentacalia riotintis | Plants | Ecuador |
| 781. | Pentacalia pailasensis | Pentacalia pailasensis | Plants | Ecuador |
| 782. | Pentacalia gibbiflora | Pentacalia gibbiflora | Plants | Ecuador |
| 783. | Pentacalia cazaletii | Pentacalia cazaletii | Plants | Ecuador |
| 784. | Pentagonia peruviana | Pentagonia peruviana | Plants | Ecuador |
| 785. | Pentagonia orthoneura | Pentagonia orthoneura | Plants | Ecuador |
| 786. | Pentagonia involucrata | Pentagonia involucrata | Plants | Ecuador |
| 787. | Pepinia alexanderi | Pepinia alexanderi | Plants | Ecuador |
| 788. | Pepinia hooveri | Pepinia hooveri | Plants | Ecuador |
| 789. | Pepper Vine | Piper begoniiforme | Plants | Ecuador |
| 790. | Pepper Vine | Piper coeloneurum | Plants | Ecuador |
| 791. | Pepper Vine | Piper eriocladum | Plants | Ecuador |
| 792. | Pepper Vine | Piper longicaudatum | Plants | Ecuador |
| 793. | Pepper Vine | Piper platylobum | Plants | Ecuador |
| 794. | Pepper Vine | Piper skutchii | Plants | Ecuador |
| 795. | Pepper Vine | Piper baezense | Plants | Ecuador |
| 796. | Pepper Vine | Piper clathratum | Plants | Ecuador |
| 797. | Pepper Vine | Piper entradense | Plants | Ecuador |
| 798. | Pepper Vine | Piper hydrolapathum | Plants | Ecuador |
| 799. | Pepper Vine | Piper perstrigosum | Plants | Ecuador |
| 800. | Pepper Vine | Piper saloyanum | Plants | Ecuador |
| 801. | Pepper Vine | Piper zarumanum | Plants | Ecuador |
| 802. | Pepper Vine | Piper baezanum | Plants | Ecuador |
| 803. | Pepper Vine | Piper chimborazoense | Plants | Ecuador |
| 804. | Pepper Vine | Piper dodsonii | Plants | Ecuador |
| 805. | Pepper Vine | Piper huigranum | Plants | Ecuador |
| 806. | Pepper Vine | Piper nanegalense | Plants | Ecuador |
| 807. | Pepper Vine | Piper regale | Plants | Ecuador |
| 808. | Pepper Vine | Piper wibomii | Plants | Ecuador |
| 809. | Pepper Vine | Piper azuaiense | Plants | Ecuador |
| 810. | Pepper Vine | Piper campii | Plants | Ecuador |
| 811. | Pepper Vine | Piper disparipilum | Plants | Ecuador |
| 812. | Pepper Vine | Piper guayasanum | Plants | Ecuador |
| 813. | Pepper Vine | Piper molliusculum | Plants | Ecuador |
| 814. | Pepper Vine | Piper puyoense | Plants | Ecuador |
| 815. | Pepper Vine | Piper valladolidense | Plants | Ecuador |
| 816. | Pepper Vine | Piper angamarcanum | Plants | Ecuador |
| 817. | Pepper Vine | Piper bullatifolium | Plants | Ecuador |
| 818. | Pepper Vine | Piper diffundum | Plants | Ecuador |
| 819. | Pepper Vine | Piper gualeanum | Plants | Ecuador |
| 820. | Pepper Vine | Piper mexiae | Plants | Ecuador |
| 821. | Pepper Vine | Piper productispicum | Plants | Ecuador |
| 822. | Pepper Vine | Piper trachyphyllum | Plants | Ecuador |
| 823. | Pepper Vine | Piper achupallasense | Plants | Ecuador |
| 824. | Pepper Vine | Piper brachystylum | Plants | Ecuador |
| 825. | Pepper Vine | Piper densiciliatum | Plants | Ecuador |
| 826. | Pepper Vine | Piper fallenii | Plants | Ecuador |
| 827. | Pepper Vine | Piper mendezense | Plants | Ecuador |
| 828. | Pepper Vine | Piper prietoi | Plants | Ecuador |
| 829. | Pepper Vine | Piper subnitidifolium | Plants | Ecuador |
| 830. | Pepper Vine | Piper brachipilum | Plants | Ecuador |
| 831. | Pepper Vine | Piper cutucuense | Plants | Ecuador |
| 832. | Pepper Vine | Piper eustylum | Plants | Ecuador |
| 833. | Pepper Vine | Piper manabinum | Plants | Ecuador |
| 834. | Pepper Vine | Piper poscitum | Plants | Ecuador |
| 835. | Pepper Vine | Piper stipulosum | Plants | Ecuador |
| 836. | Persea conferta | Persea conferta | Plants | Ecuador |
| 837. | Persimmon Tree | Diospyros esmereg | Plants | Ecuador |
| 838. | Peruvian Antpitta | Grallaricula peruviana | Birds | Ecuador, Peru |
| 839. | Peruvian Tern | Sterna lorata | Birds | Chile, Ecuador, Peru |
| 840. | Phaedranassa viridiflora | Phaedranassa viridiflora | Plants | Ecuador |
| 841. | Phaedranassa tunguraguae | Phaedranassa tunguraguae | Plants | Ecuador |
| 842. | Phaedranassa glauciflora | Phaedranassa glauciflora | Plants | Ecuador |
| 843. | Phaedranassa brevifolia | Phaedranassa brevifolia | Plants | Ecuador |
| 844. | Phantasmal Poison Frog | Epipedobates tricolor | Amphibians | Ecuador |
| 845. | Pharus ecuadoricus | Pharus ecuadoricus | Plants | Ecuador |
| 846. | Phaseolus rosei | Phaseolus rosei | Plants | Ecuador |
| 847. | Phaseolus rimbachii | Phaseolus rimbachii | Plants | Ecuador |
| 848. | Philodendron pogonocaule | Philodendron pogonocaule | Plants | Ecuador |
| 849. | Philodendron nanegalense | Philodendron nanegalense | Plants | Ecuador |
| 850. | Philodendron cruentospathum | Philodendron cruentospathum | Plants | Ecuador |
| 851. | Philodendron balaoanum | Philodendron balaoanum | Plants | Ecuador |
| 852. | Philodendron ventricosum | Philodendron ventricosum | Plants | Ecuador |
| 853. | Philodendron quitense | Philodendron quitense | Plants | Ecuador |
| 854. | Phoradendron wiensii | Phoradendron wiensii | Plants | Ecuador |
| 855. | Phoradendron madisonii | Phoradendron madisonii | Plants | Ecuador |
| 856. | Phoradendron aequatoris | Phoradendron aequatoris | Plants | Ecuador |
| 857. | Phycodrina elegans | Phycodrina elegans | Plants | Ecuador (Galapagos Islands) |
| 858. | Pichincha Giant Glass Frog | Centrolene heloderma | Amphibians | Colombia, Ecuador |
| 859. | Pichincha Rocket Frog | Hyloxalus toachi | Amphibians | Ecuador |
| 860. | Pilalo Treefrog | Hyloscirtus ptychodactylus | Amphibians | Ecuador |
| 861. | Pilea tungurahuae | Pilea tungurahuae | Plants | Ecuador |
| 862. | Pilea selbyanorum | Pilea selbyanorum | Plants | Ecuador |
| 863. | Pilea riopalenquensis | Pilea riopalenquensis | Plants | Ecuador |
| 864. | Pink-sided Treefrog | Agalychnis litodryas | Amphibians | Ecuador, Panama |
| 865. | Pink-throated Brilliant | Heliodoxa gularis | Birds | Colombia, Ecuador, Peru |
| 866. | Pitcairnia aequatorialis | Pitcairnia aequatorialis | Plants | Ecuador |
| 867. | Pitcairnia oblongifolia | Pitcairnia oblongifolia | Plants | Ecuador |
| 868. | Pitcairnia lutescens | Pitcairnia lutescens | Plants | Ecuador |
| 869. | Pitcairnia elliptica | Pitcairnia elliptica | Plants | Ecuador |
| 870. | Pitcairnia clarkii | Pitcairnia clarkii | Plants | Ecuador |
| 871. | Pitcairnia caduciflora | Pitcairnia caduciflora | Plants | Ecuador |
| 872. | Pitcairnia bergii | Pitcairnia bergii | Plants | Ecuador |
| 873. | Pitcairnia alata | Pitcairnia alata | Plants | Ecuador |
| 874. | Pitcairnia reflexiflora | Pitcairnia reflexiflora | Plants | Ecuador |
| 875. | Plate-billed Mountain-toucan | Andigena laminirostris | Birds | Colombia, Ecuador |
| 876. | Pleurothyrium obovatum | Pleurothyrium obovatum | Plants | Ecuador |
| 877. | Pleurothyrium giganthum | Pleurothyrium giganthum | Plants | Ecuador |
| 878. | Plumbeous Hawk | Leucopternis plumbeus | Birds | Colombia, Ecuador, Panama, Peru |
| 879. | Pocketbook Flower | Calceolaria bentae | Plants | Ecuador |
| 880. | Pocketbook Flower | Calceolaria obtusa | Plants | Ecuador |
| 881. | Pocketbook Flower | Calceolaria australis | Plants | Ecuador |
| 882. | Pocketbook Flower | Calceolaria martinezii | Plants | Ecuador |
| 883. | Pocketbook Flower | Calceolaria lavandulifolia | Plants | Ecuador |
| 884. | Pocketbook Flower | Calceolaria grandiflora | Plants | Ecuador |
| 885. | Pocketbook Flower | Calceolaria gossypina | Plants | Ecuador |
| 886. | Pocketbook Flower | Calceolaria semiconnata | Plants | Ecuador |
| 887. | Pocketbook Flower | Calceolaria frondosa | Plants | Ecuador |
| 888. | Pocketbook Flower | Calceolaria platyzyga | Plants | Ecuador |
| 889. | Pocketbook Flower | Calceolaria commutata | Plants | Ecuador |
| 890. | Pocketbook Flower | Calceolaria odontophylla | Plants | Ecuador |
| 891. | Podandrogyne trichopus | Podandrogyne trichopus | Plants | Ecuador |
| 892. | Podandrogyne jamesonii | Podandrogyne jamesonii | Plants | Ecuador |
| 893. | Podandrogyne brevipedunculata | Podandrogyne brevipedunculata | Plants | Ecuador |
| 894. | Polypodium abitaguae | Polypodium abitaguae | Plants | Ecuador |
| 895. | Polystichum bulbiferum | Polystichum bulbiferum | Plants | Ecuador |
| 896. | Pouteria Tree | Pouteria gigantea | Plants | Ecuador |
| 897. | Pouteria Tree | Pouteria capacifolia | Plants | Ecuador |
| 898. | Pouteria Tree | Pouteria brevipetiolata | Plants | Ecuador |
| 899. | Prestonia rotundifolia | Prestonia rotundifolia | Plants | Ecuador |
| 900. | Prestonia peregrina | Prestonia peregrina | Plants | Ecuador |
| 901. | Prestonia parvifolia | Prestonia parvifolia | Plants | Ecuador |
| 902. | Prestonia schumanniana | Prestonia schumanniana | Plants | Ecuador |
| 903. | Prickly Pear | Opuntia saxicola | Plants | Ecuador |
| 904. | Prickly Pear | Opuntia insularis | Plants | Ecuador |
| 905. | Prickly Pear | Opuntia galapageia | Plants | Ecuador |
| 906. | Pristimantis Rain Frog | Pristimantis devillei | Amphibians | Ecuador |
| 907. | Pristimantis Rain Frog | Pristimantis hamiotae | Amphibians | Ecuador |
| 908. | Pristimantis Rain Frog | Pristimantis orestes | Amphibians | Ecuador |
| 909. | Pristimantis Rain Frog | Pristimantis pyrrhomerus | Amphibians | Ecuador |
| 910. | Pristimantis Rain Frog | Pristimantis tenebrionis | Amphibians | Ecuador |
| 911. | Pristimantis Rain Frog | Pristimantis balionotus | Amphibians | Ecuador |
| 912. | Pristimantis Rain Frog | Pristimantis degener | Amphibians | Colombia, Ecuador |
| 913. | Pristimantis Rain Frog | Pristimantis glandulosus | Amphibians | Ecuador |
| 914. | Pristimantis Rain Frog | Pristimantis modipeplus | Amphibians | Ecuador |
| 915. | Pristimantis Rain Frog | Pristimantis pycnodermis | Amphibians | Ecuador |
| 916. | Pristimantis Rain Frog | Pristimantis surdus | Amphibians | Ecuador |
| 917. | Pristimantis Rain Frog | Pristimantis atratus | Amphibians | Ecuador |
| 918. | Pristimantis Rain Frog | Pristimantis cryptomelas | Amphibians | Ecuador, Peru |
| 919. | Pristimantis Rain Frog | Pristimantis gladiator | Amphibians | Ecuador |
| 920. | Pristimantis Rain Frog | Pristimantis loustes | Amphibians | Colombia, Ecuador |
| 921. | Pristimantis Rain Frog | Pristimantis pteridophilus | Amphibians | Ecuador |
| 922. | Pristimantis Rain Frog | Pristimantis sobetes | Amphibians | Ecuador |
| 923. | Pristimantis Rain Frog | Pristimantis acerus | Amphibians | Ecuador |
| 924. | Pristimantis Rain Frog | Pristimantis cryophilius | Amphibians | Ecuador |
| 925. | Pristimantis Rain Frog | Pristimantis gentryi | Amphibians | Ecuador |
| 926. | Pristimantis Rain Frog | Pristimantis lividus | Amphibians | Ecuador |
| 927. | Pristimantis Rain Frog | Pristimantis proserpens | Amphibians | Ecuador, Peru |
| 928. | Pristimantis Rain Frog | Pristimantis simonbolivari | Amphibians | Ecuador |
| 929. | Pristimantis Rain Frog | Pristimantis crenunguis | Amphibians | Ecuador |
| 930. | Pristimantis Rain Frog | Pristimantis festae | Amphibians | Ecuador |
| 931. | Pristimantis Rain Frog | Pristimantis katoptroides | Amphibians | Ecuador |
| 932. | Pristimantis Rain Frog | Pristimantis prolatus | Amphibians | Ecuador |
| 933. | Pristimantis Rain Frog | Pristimantis scolodiscus | Amphibians | Colombia, Ecuador |
| 934. | Pristimantis Rain Frog | Pristimantis vidua | Amphibians | Ecuador |
| 935. | Pristimantis Rain Frog | Pristimantis cremnobates | Amphibians | Ecuador |
| 936. | Pristimantis Rain Frog | Pristimantis eugeniae | Amphibians | Ecuador |
| 937. | Pristimantis Rain Frog | Pristimantis incanus | Amphibians | Ecuador |
| 938. | Pristimantis Rain Frog | Pristimantis percultus | Amphibians | Ecuador |
| 939. | Pristimantis Rain Frog | Pristimantis rubicundus | Amphibians | Ecuador |
| 940. | Pristimantis Rain Frog | Pristimantis truebae | Amphibians | Ecuador |
| 941. | Pristimantis Rain Frog | Pristimantis colomai | Amphibians | Colombia, Ecuador |
| 942. | Pristimantis Rain Frog | Pristimantis dissimulatus | Amphibians | Ecuador |
| 943. | Pristimantis Rain Frog | Pristimantis ignicolor | Amphibians | Ecuador |
| 944. | Pristimantis Rain Frog | Pristimantis pastazensis | Amphibians | Ecuador |
| 945. | Pristimantis Rain Frog | Pristimantis rhodoplichus | Amphibians | Ecuador, Peru |
| 946. | Pristimantis Rain Frog | Pristimantis thymalopsoides | Amphibians | Ecuador |
| 947. | Pristimantis Rain Frog | Pristimantis baryecuus | Amphibians | Ecuador |
| 948. | Pseudogynoxys engleri | Pseudogynoxys engleri | Plants | Ecuador |
| 949. | Pseudolmedia manabiensis | Pseudolmedia manabiensis | Plants | Ecuador |
| 950. | Psidium pedicellatum | Psidium pedicellatum | Plants | Ecuador |
| 951. | Psilanthele eggersii | Psilanthele eggersii | Plants | Ecuador |
| 952. | Psychotria sodiroi | Psychotria sodiroi | Plants | Ecuador |
| 953. | Psychotria rimbachii | Psychotria rimbachii | Plants | Ecuador |
| 954. | Psychotria madida | Psychotria madida | Plants | Ecuador |
| 955. | Psychotria angustata | Psychotria angustata | Plants | Ecuador |
| 956. | Pteromonnina fosbergii | Pteromonnina fosbergii | Plants | Ecuador |
| 957. | Purplish-mantled Tanager | Iridosornis porphyrocephalus | Birds | Colombia, Ecuador |
| 958. | Puya angelensis | Puya angelensis | Plants | Ecuador |
| 959. | Puya roseana | Puya roseana | Plants | Ecuador |
| 960. | Puya parviflora | Puya parviflora | Plants | Ecuador |
| 961. | Puya exigua | Puya exigua | Plants | Ecuador |
| 962. | Puya compacta | Puya compacta | Plants | Ecuador |
| 963. | Puyo Giant Glass Frog | Cochranella puyoensis | Amphibians | Ecuador |
| 964. | Racinaea tripinnata | Racinaea tripinnata | Plants | Ecuador |
| 965. | Racinaea inconspicua | Racinaea inconspicua | Plants | Ecuador |
| 966. | Radiator Plant | Peperomia micromerioides | Plants | Ecuador |
| 967. | Radiator Plant | Peperomia petraea | Plants | Ecuador |
| 968. | Radiator Plant | Peperomia tablahuasiana | Plants | Ecuador |
| 969. | Radiator Plant | Peperomia espinosae | Plants | Ecuador |
| 970. | Radiator Plant | Peperomia litana | Plants | Ecuador |
| 971. | Radiator Plant | Peperomia persuculenta | Plants | Ecuador |
| 972. | Radiator Plant | Peperomia subdiscoidea | Plants | Ecuador |
| 973. | Radiator Plant | Peperomia disjunctiflora | Plants | Ecuador |
| 974. | Radiator Plant | Peperomia leucorrhachis | Plants | Ecuador |
| 975. | Radiator Plant | Peperomia peploides | Plants | Ecuador |
| 976. | Radiator Plant | Peperomia stenostachya | Plants | Ecuador |
| 977. | Radiator Plant | Peperomia dauleana | Plants | Ecuador |
| 978. | Radiator Plant | Peperomia leucanthera | Plants | Ecuador |
| 979. | Radiator Plant | Peperomia parvilimba | Plants | Ecuador |
| 980. | Radiator Plant | Peperomia salangonis | Plants | Ecuador |
| 981. | Radiator Plant | Peperomia wibomii | Plants | Ecuador |
| 982. | Radiator Plant | Peperomia cordilimba | Plants | Ecuador |
| 983. | Radiator Plant | Peperomia lehmannii | Plants | Ecuador |
| 984. | Radiator Plant | Peperomia paradoxa | Plants | Ecuador |
| 985. | Radiator Plant | Peperomia rubropunctulata | Plants | Ecuador |
| 986. | Radiator Plant | Peperomia valladolidana | Plants | Ecuador |
| 987. | Radiator Plant | Peperomia clivigaudens | Plants | Ecuador |
| 988. | Radiator Plant | Peperomia guayaquilensis | Plants | Ecuador |
| 989. | Radiator Plant | Peperomia pachystachya | Plants | Ecuador |
| 990. | Radiator Plant | Peperomia pululaguana | Plants | Ecuador |
| 991. | Radiator Plant | Peperomia udimontana | Plants | Ecuador |
| 992. | Radiator Plant | Peperomia arenillasensis | Plants | Ecuador |
| 993. | Radiator Plant | Peperomia glandulosa | Plants | Ecuador |
| 994. | Radiator Plant | Peperomia mitchelioides | Plants | Ecuador |
| 995. | Radiator Plant | Peperomia pichinchae | Plants | Ecuador |
| 996. | Radiator Plant | Peperomia tuberculata | Plants | Ecuador |
| 997. | Radiator Plant | Peperomia albovittata | Plants | Ecuador |
| 998. | Radiator Plant | Peperomia fagerlindii | Plants | Ecuador |
| 999. | Randia carlosiana | Randia carlosiana | Plants | Ecuador |
| 1000. | Red-masked Parakeet | Aratinga erythrogenys | Birds | Ecuador, Peru |
| 1001. | Reedgrass | Calamagrostis brevipaleata | Plants | Ecuador |
| 1002. | Reldia calcarata | Reldia calcarata | Plants | Ecuador |
| 1003. | Rhaebo caeruleostictus | Rhaebo caeruleostictus | Amphibians | Ecuador |
| 1004. | Rhinella amabilis | Rhinella amabilis | Amphibians | Ecuador |
| 1005. | Ridge Marsupial Frog | Gastrotheca psychrophila | Amphibians | Ecuador |
| 1006. | Rinorea deflexa | Rinorea deflexa | Plants | Ecuador |
| 1007. | Rio Chingual Valley Treefrog | Hyloscirtus pantostictus | Amphibians | Colombia, Ecuador |
| 1008. | Rio Chipillico Frog | Lithobates bwana | Amphibians | Ecuador, Peru |
| 1009. | Rio Faisanes Stubfoot Toad | Atelopus coynei | Amphibians | Ecuador |
| 1010. | Rio Pescado Stubfoot Toad | Atelopus balios | Amphibians | Ecuador |
| 1011. | Rio Pitzara Robber Frog | Strabomantis helonotus | Amphibians | Ecuador |
| 1012. | Riobamba Marsupial Frog | Gastrotheca riobambae | Amphibians | Ecuador |
| 1013. | Rollinia helosioides | Rollinia helosioides | Plants | Brazil, Ecuador |
| 1014. | Ronnbergia campanulata | Ronnbergia campanulata | Plants | Ecuador |
| 1015. | Roupala brachybotrys | Roupala brachybotrys | Plants | Ecuador |
| 1016. | Ruagea microphylla | Ruagea microphylla | Plants | Ecuador |
| 1017. | Rushfoil | Croton rivinifolius | Plants | Ecuador |
| 1018. | Rushfoil | Croton pavonis | Plants | Ecuador |
| 1019. | Rushfoil | Croton lehmannii | Plants | Ecuador |
| 1020. | Rushfoil | Croton fraseri | Plants | Ecuador |
| 1021. | Rushfoil | Croton eggersii | Plants | Ecuador |
| 1022. | Rustia bilsana | Rustia bilsana | Plants | Ecuador |
| 1023. | Saccoloma squamosum | Saccoloma squamosum | Plants | Ecuador |
| 1024. | Saccoloma laxum | Saccoloma laxum | Plants | Ecuador |
| 1025. | Sage | Salvia unguella | Plants | Ecuador |
| 1026. | Sage | Salvia peregrina | Plants | Ecuador |
| 1027. | Sage | Salvia loxensis | Plants | Ecuador |
| 1028. | Sage | Salvia ecuadorensis | Plants | Ecuador |
| 1029. | San Cristobal Mockingbird | Mimus melanotis | Birds | Ecuador |
| 1030. | San Lucas Marsupial Frog | Gastrotheca pseustes | Amphibians | Ecuador |
| 1031. | Sanchezia lampra | Sanchezia lampra | Plants | Ecuador |
| 1032. | Sandwort | Arenaria radians | Plants | Ecuador |
| 1033. | Santiago Rocket Frog | Hyloxalus shuar | Amphibians | Ecuador |
| 1034. | Saurauia striata | Saurauia striata | Plants | Ecuador |
| 1035. | Saurauia mexiae | Saurauia mexiae | Plants | Ecuador |
| 1036. | Saurauia aguaricana | Saurauia aguaricana | Plants | Ecuador |
| 1037. | Saurauia tambensis | Saurauia tambensis | Plants | Ecuador |
| 1038. | Scalesia microcephala | Scalesia microcephala | Plants | Ecuador |
| 1039. | Scalesia gordilloi | Scalesia gordilloi | Plants | Ecuador |
| 1040. | Scalesia divisa | Scalesia divisa | Plants | Ecuador |
| 1041. | Scalesia cordata | Scalesia cordata | Plants | Ecuador |
| 1042. | Scalesia atractyloides | Scalesia atractyloides | Plants | Ecuador |
| 1043. | Schizymenia ecuadoreana | Schizymenia ecuadoreana | Plants | Ecuador |
| 1044. | Schmidt's Stubfoot Toad | Atelopus pachydermus | Amphibians | Ecuador, Peru |
| 1045. | Semicollared Hawk | Accipiter collaris | Birds | Colombia, Ecuador, Peru, Venezuela |
| 1046. | Senna scandens | Senna scandens | Plants | Ecuador |
| 1047. | Serjania brevipes | Serjania brevipes | Plants | Ecuador |
| 1048. | Short-eared Dog | Atelocynus microtis | Mammals | Bolivia, Brazil, Colombia, Ecuador, Peru |
| 1049. | Simira standleyi | Simira standleyi | Plants | Ecuador |
| 1050. | Siparuna eggersii | Siparuna eggersii | Plants | Ecuador |
| 1051. | Siparuna campii | Siparuna campii | Plants | Ecuador |
| 1052. | Siparuna palenquensis | Siparuna palenquensis | Plants | Ecuador |
| 1053. | Siphocampylus lucidus | Siphocampylus lucidus | Plants | Ecuador |
| 1054. | Siphocampylus loxensis | Siphocampylus loxensis | Plants | Ecuador |
| 1055. | Siphocampylus furax | Siphocampylus furax | Plants | Ecuador |
| 1056. | Siphocampylus fruticosus | Siphocampylus fruticosus | Plants | Ecuador |
| 1057. | Siphocampylus ecuadoriensis | Siphocampylus ecuadoriensis | Plants | Ecuador |
| 1058. | Siphocampylus uncipes | Siphocampylus uncipes | Plants | Ecuador |
| 1059. | Siphocampylus asplundii | Siphocampylus asplundii | Plants | Ecuador |
| 1060. | Siphocampylus rupestris | Siphocampylus rupestris | Plants | Ecuador |
| 1061. | Siphocampylus rostratus | Siphocampylus rostratus | Plants | Ecuador |
| 1062. | Slaty Becard | Pachyramphus spodiurus | Birds | Ecuador, Peru |
| 1063. | Smokey Bat | Amorphochilus schnablii | Mammals | Chile, Ecuador, Peru |
| 1064. | Solanopteris tuberosum | Solanopteris tuberosum | Plants | Ecuador |
| 1065. | Solanum albornozii | Solanum albornozii | Plants | Ecuador |
| 1066. | Solanum semicoalitum | Solanum semicoalitum | Plants | Ecuador |
| 1067. | Solanum lanuginosum | Solanum lanuginosum | Plants | Ecuador |
| 1068. | Solanum dolichorhachis | Solanum dolichorhachis | Plants | Ecuador |
| 1069. | Solanum chimborazense | Solanum chimborazense | Plants | Ecuador |
| 1070. | Solanum carchiense | Solanum carchiense | Plants | Ecuador |
| 1071. | Sorocea sarcocarpa | Sorocea sarcocarpa | Plants | Ecuador |
| 1072. | South American Rocket Frog | Hyloxalus anthracinus | Amphibians | Ecuador |
| 1073. | South American Tapir | Tapirus terrestris | Mammals | Colombia and Venezuela south to Paraguay and Argentina |
| 1074. | Spanish Moss | Tillandsia nervisepala | Plants | Ecuador |
| 1075. | Spanish Moss | Tillandsia indigofera | Plants | Ecuador |
| 1076. | Spanish Moss | Tillandsia zarumensis | Plants | Ecuador |
| 1077. | Spanish Moss | Tillandsia dyeriana | Plants | Ecuador |
| 1078. | Spanish Moss | Tillandsia umbellata | Plants | Ecuador |
| 1079. | Spanish Moss | Tillandsia demissa | Plants | Ecuador |
| 1080. | Spanish Moss | Tillandsia rubroviolacea | Plants | Ecuador |
| 1081. | Spanish Moss | Tillandsia cernua | Plants | Ecuador |
| 1082. | Spanish Moss | Tillandsia portillae | Plants | Ecuador |
| 1083. | Spanish Moss | Tillandsia acosta-solisii | Plants | Ecuador |
| 1084. | Spanish Moss | Tillandsia polyantha | Plants | Ecuador |
| 1085. | Spanish Moss | Tillandsia pachyaxon | Plants | Ecuador |
| 1086. | Spatoglossum schmittii | Spatoglossum schmittii | Plants | Ecuador |
| 1087. | Spotted Eagle Ray | Aetobatus narinari | Fishes | Africa, Asia, Australia, Central America, Middle East, North America (including United States and US Island Territory and Hawaii), Oceans, South America |
| 1088. | Spruceanthus theobromae | Spruceanthus theobromae | Plants | Ecuador |
| 1089. | Stachytarpheta svensonii | Stachytarpheta svensonii | Plants | Ecuador |
| 1090. | Stenopadus andicola | Stenopadus andicola | Plants | Ecuador |
| 1091. | Stenospermation arborescens | Stenospermation arborescens | Plants | Ecuador |
| 1092. | Stenostephanus harlingii | Stenostephanus harlingii | Plants | Ecuador |
| 1093. | Stenostephanus asplundii | Stenostephanus asplundii | Plants | Ecuador |
| 1094. | Stenostephanus laxus | Stenostephanus laxus | Plants | Ecuador |
| 1095. | Steriphoma urbani | Steriphoma urbani | Plants | Ecuador |
| 1096. | Stevia anisostemma | Stevia anisostemma | Plants | Ecuador |
| 1097. | Stigmaphyllon nudiflorum | Stigmaphyllon nudiflorum | Plants | Ecuador |
| 1098. | Stigmaphyllon eggersii | Stigmaphyllon eggersii | Plants | Ecuador |
| 1099. | Stigmaphyllon ecudorense | Stigmaphyllon ecudorense | Plants | Ecuador |
| 1100. | Stilpnophyllum grandifolium | Stilpnophyllum grandifolium | Plants | Ecuador |
| 1101. | Stipa tulcanensis | Stipa tulcanensis | Plants | Ecuador |
| 1102. | String Sargassum | Sargassum setifolium | Plants | Ecuador (Galapagos Islands) |
| 1103. | Struthanthus lojae | Struthanthus lojae | Plants | Ecuador |
| 1104. | Styloceras kunthianum | Styloceras kunthianum | Plants | Ecuador |
| 1105. | Swartzia littlei | Swartzia littlei | Plants | Ecuador |
| 1106. | Swartzia aureosericea | Swartzia aureosericea | Plants | Ecuador |
| 1107. | Symplocos carmencitae | Symplocos carmencitae | Plants | Ecuador |
| 1108. | Symplocos blancae | Symplocos blancae | Plants | Ecuador |
| 1109. | Symplocos badia | Symplocos badia | Plants | Ecuador |
| 1110. | Symplocos truncata | Symplocos truncata | Plants | Ecuador |
| 1111. | Symplocos pluribracteata | Symplocos pluribracteata | Plants | Ecuador |
| 1112. | Symplocos globosa | Symplocos globosa | Plants | Ecuador |
| 1113. | Syngonium dodsonianum | Syngonium dodsonianum | Plants | Ecuador |
| 1114. | Tadapi Treefrog | Hyloscirtus alytolylax | Amphibians | Colombia, Ecuador |
| 1115. | Talamancalia putcalensis | Talamancalia putcalensis | Plants | Ecuador |
| 1116. | Talamancalia fosbergii | Talamancalia fosbergii | Plants | Ecuador |
| 1117. | Talauma dixonii | Talauma dixonii | Plants | Ecuador |
| 1118. | Talisia setigera | Talisia setigera | Plants | Ecuador |
| 1119. | Talisia bullata | Talisia bullata | Plants | Ecuador |
| 1120. | Tapirira rubrinervis | Tapirira rubrinervis | Plants | Ecuador |
| 1121. | Tartaruga | Podocnemis expansa | Reptiles | South America (Orinoco R. and Amazon R. basins) |
| 1122. | Ternstroemia cleistogama | Ternstroemia cleistogama | Plants | Ecuador |
| 1123. | Tibouchina anderssonii | Tibouchina anderssonii | Plants | Ecuador |
| 1124. | Tonguefern | Elaphoglossum corazonense | Plants | Ecuador |
| 1125. | Tonguefern | Elaphoglossum longissimum | Plants | Ecuador |
| 1126. | Tonguefern | Elaphoglossum trichophorum | Plants | Ecuador |
| 1127. | Tonguefern | Elaphoglossum cladotrichium | Plants | Ecuador |
| 1128. | Tonguefern | Elaphoglossum jamesonii | Plants | Ecuador |
| 1129. | Tonguefern | Elaphoglossum sprucei | Plants | Ecuador |
| 1130. | Tonguefern | Elaphoglossum christii | Plants | Ecuador |
| 1131. | Tonguefern | Elaphoglossum isophyllum | Plants | Ecuador |
| 1132. | Tonguefern | Elaphoglossum spectabile | Plants | Ecuador |
| 1133. | Tonguefern | Elaphoglossum chodatii | Plants | Ecuador |
| 1134. | Tonguefern | Elaphoglossum herpestes | Plants | Ecuador |
| 1135. | Tonguefern | Elaphoglossum sodiroi | Plants | Ecuador |
| 1136. | Tonguefern | Elaphoglossum bonapartii | Plants | Ecuador |
| 1137. | Tonguefern | Elaphoglossum gracilipes | Plants | Ecuador |
| 1138. | Tonguefern | Elaphoglossum pteropodum | Plants | Ecuador |
| 1139. | Tonguefern | Elaphoglossum angamarcanum | Plants | Ecuador |
| 1140. | Tonguefern | Elaphoglossum gossypinum | Plants | Ecuador |
| 1141. | Tonguefern | Elaphoglossum polytrichum | Plants | Ecuador |
| 1142. | Tonguefern | Elaphoglossum actinolepis | Plants | Ecuador |
| 1143. | Tonguefern | Elaphoglossum engleri | Plants | Ecuador |
| 1144. | Tonguefern | Elaphoglossum pellucidum | Plants | Ecuador |
| 1145. | Topobea verrucosa | Topobea verrucosa | Plants | Ecuador |
| 1146. | Topobea toachiensis | Topobea toachiensis | Plants | Ecuador |
| 1147. | Topobea maguirei | Topobea maguirei | Plants | Ecuador |
| 1148. | Topobea macbrydei | Topobea macbrydei | Plants | Ecuador |
| 1149. | Topobea eplingii | Topobea eplingii | Plants | Ecuador |
| 1150. | Topobea cutucuensis | Topobea cutucuensis | Plants | Ecuador |
| 1151. | Tournefortia obtusiflora | Tournefortia obtusiflora | Plants | Ecuador |
| 1152. | Tovomita aequatoriensis | Tovomita aequatoriensis | Plants | Ecuador |
| 1153. | Tracaja | Podocnemis unifilis | Reptiles | South America (Orinoco R. and Amazon R. basins) |
| 1154. | Triolena campii | Triolena campii | Plants | Ecuador |
| 1155. | Triolena asplundii | Triolena asplundii | Plants | Ecuador |
| 1156. | Tropaeolum umbellatum | Tropaeolum umbellatum | Plants | Ecuador |
| 1157. | Tropaeolum carchense | Tropaeolum carchense | Plants | Ecuador |
| 1158. | Tropical Acidweed | Desmarestia tropica | Plants | Ecuador (Galapagos Islands) |
| 1159. | Turnera hindsiana | Turnera hindsiana | Plants | Ecuador |
| 1160. | Turquoise-throated Puffleg | Eriocnemis godini | Birds | Colombia, Ecuador |
| 1161. | Uncinia lacustris | Uncinia lacustris | Plants | Ecuador |
| 1162. | Uniola condensata | Uniola condensata | Plants | Ecuador |
| 1163. | Valeriana secunda | Valeriana secunda | Plants | Ecuador |
| 1164. | Vellard's Water Frog | Telmatobius vellardi | Amphibians | Ecuador |
| 1165. | Verbesina ecuatoriana | Verbesina ecuatoriana | Plants | Ecuador |
| 1166. | Verbesina barclayae | Verbesina barclayae | Plants | Ecuador |
| 1167. | Verbesina villonacoensis | Verbesina villonacoensis | Plants | Ecuador |
| 1168. | Verbesina minuticeps | Verbesina minuticeps | Plants | Ecuador |
| 1169. | Verbesina harlingii | Verbesina harlingii | Plants | Ecuador |
| 1170. | Vernonia nonoensis | Vernonia nonoensis | Plants | Ecuador |
| 1171. | Viburnum divaricatum | Viburnum divaricatum | Plants | Ecuador |
| 1172. | Viguiera media | Viguiera media | Plants | Ecuador |
| 1173. | Violet | Viola cuicochensis | Plants | Ecuador |
| 1174. | Violet-throated Metaltail | Metallura baroni | Birds | Ecuador |
| 1175. | Virola surinamensis | Virola surinamensis | Plants | Brazil, Costa Rica, Ecuador, French Guiana, Guyana, Panama, Peru, Suriname, Venezuela |
| 1176. | Vriesea strobeliae | Vriesea strobeliae | Plants | Ecuador |
| 1177. | Vriesea petraea | Vriesea petraea | Plants | Ecuador |
| 1178. | Vriesea drewii | Vriesea drewii | Plants | Ecuador |
| 1179. | Vriesea appendiculata | Vriesea appendiculata | Plants | Ecuador |
| 1180. | Waterfall Rocket Frog | Colostethus jacobuspetersi | Amphibians | Ecuador |
| 1181. | Wattled Guan | Aburria aburri | Birds | Colombia, Ecuador, Peru, Venezuela |
| 1182. | Waved Albatross | Phoebastria irrorata | Birds | Colombia, Ecuador, Peru |
| 1183. | Wedelia oxylepis | Wedelia oxylepis | Plants | Ecuador |
| 1184. | Weinmannia costulata | Weinmannia costulata | Plants | Ecuador |
| 1185. | Wellington's Solitary Coral | Rhizopsammia wellingtoni | Corals, Jellyfish, and Sea Anemones | Ecuador (Galapagos Islands) |
| 1186. | Werauhia diantha | Werauhia diantha | Plants | Ecuador |
| 1187. | Wettinia minima | Wettinia minima | Plants | Ecuador |
| 1188. | Wissadula diffusa | Wissadula diffusa | Plants | Ecuador |
| 1189. | Wissadula divergens | Wissadula divergens | Plants | Ecuador |
| 1190. | Wood-sorrel | Oxalis pennelliana | Plants | Ecuador |
| 1191. | Wood-sorrel | Oxalis norlindiana | Plants | Ecuador |
| 1192. | Wood-sorrel | Oxalis ecuadorensis | Plants | Ecuador |
| 1193. | Xanthosoma eggersii | Xanthosoma eggersii | Plants | Ecuador |
| 1194. | Xenophyllum acerosum | Xenophyllum acerosum | Plants | Ecuador |
| 1195. | Xyris andina | Xyris andina | Plants | Ecuador |
| 1196. | Yellow-eared Parrot | Ognorhynchus icterotis | Birds | Colombia, Ecuador |
| 1197. | Yellow-spotted Andes Frog | Lynchius flavomaculatus | Amphibians | Ecuador, Peru |
| 1198. | Zapoteca aculeata | Zapoteca aculeata | Plants | Ecuador |
| 1199. | Zygia steyermarkii | Zygia steyermarkii | Plants | Ecuador |
| 1200. | Zygophlebia eminens | Zygophlebia eminens | Plants | Ecuador |