| myotis blythii | Yes | species | eukaryota | mammals | species | 109482 | click here |
| myotis davidii | Yes | species | eukaryota | mammals | species | 225400 | click here |
| myotis fimbriatus | Yes | species | eukaryota | mammals | species | 452653 | click here |
| myotis goudoti | Yes | species | eukaryota | mammals | species | 203698 | click here |
| myotis levis | Yes | species | eukaryota | mammals | species | 153285 | click here |
| myotis pequinius | Yes | species | eukaryota | mammals | species | 392004 | click here |
| myotis ricketti | Yes | species | eukaryota | mammals | species | 203696 | click here |
| myotis riparius | Yes | species | eukaryota | mammals | species | 124752 | click here |
| myotis sp. | Yes | species | | | species | 1911917 | click here |
| nasua nasua | Yes | species | eukaryota | mammals | species | 9651 | click here |
| nasutitermes | Yes | | | invertebrates | genus | 46570 | click here |
| nasutitermes lujae | Yes | species | eukaryota | invertebrates | species | 377946 | click here |
| nasutitermes nigriceps | Yes | species | eukaryota | invertebrates | species | 114638 | click here |
| nasutitermes takasagoensis | Yes | species | eukaryota | invertebrates | species | 62960 | click here |
| nautilus macromphalus | Yes | species | eukaryota | invertebrates | species | 34576 | click here |
| nautilus pompilius | Yes | species | eukaryota | invertebrates | species | 34573 | click here |
| neacomys spinosus | Yes | species | eukaryota | rodents | species | 48005 | click here |
| nectomys squamipes | Yes | species | eukaryota | rodents | species | 29117 | click here |
| neocapritermes taracua | Yes | species | eukaryota | invertebrates | species | 377960 | click here |
| neodon clarkei | Yes | species | eukaryota | rodents | species | 282341 | click here |
| neotermes castaneus | Yes | species | eukaryota | invertebrates | species | 223394 | click here |
| neotermes koshunensis | Yes | species | eukaryota | invertebrates | species | 60586 | click here |
| neotermes mona | Yes | species | eukaryota | invertebrates | species | 46568 | click here |
| neotermes sp. | Yes | no rank | eukaryota | invertebrates | species | 105799 | click here |
| neotoma | Yes | | | rodents | genus | 42407 | click here |
| neotoma albigula | Yes | species | eukaryota | rodents | species | 42408 | click here |
| neotoma cinerea | Yes | species | eukaryota | rodents | species | 105147 | click here |
| neotoma floridana | Yes | species | eukaryota | rodents | species | 42409 | click here |
| neotoma fuscipes | Yes | species | eukaryota | rodents | species | 105199 | click here |
| neotoma lepida | Yes | species | eukaryota | rodents | species | 56216 | click here |
| neotoma macrotis | Yes | species | eukaryota | rodents | species | 349162 | click here |
| neotoma mexicana | Yes | species | eukaryota | rodents | species | 105149 | click here |
| neovison vison | Yes | species | eukaryota | mammals | species | 452646 | click here |
| niviventer | Yes | | | rodents | genus | 69082 | click here |
| niviventer andersoni | Yes | species | eukaryota | rodents | species | 425032 | click here |
| niviventer confucianus | Yes | species | eukaryota | rodents | species | 248811 | click here |
| niviventer eha | Yes | species | eukaryota | rodents | species | 425033 | click here |
| niviventer excelsior | Yes | species | eukaryota | rodents | species | 349709 | click here |
| niviventer fulvescens | Yes | species | eukaryota | rodents | species | 83774 | click here |
| niviventer niviventer | Yes | species | eukaryota | rodents | species | 83757 | click here |
| niviventer tenaster | Yes | species | eukaryota | rodents | species | 946209 | click here |
| notophthalmus viridescens | Yes | species | eukaryota | vertebrates | species | 8316 | click here |
| numididae | Yes | | | vertebrates | family | 8990 | click here |
| nyctalus noctula | Yes | species | eukaryota | mammals | species | 51300 | click here |
| nyctereutes procyonoides | Yes | species | eukaryota | mammals | species | 34880 | click here |
| nycteris | Yes | | | mammals | genus | 59466 | click here |
| nycteris thebaica | Yes | species | eukaryota | mammals | species | 59467 | click here |
| oceanodroma monorhis | Yes | species | eukaryota | vertebrates | species | 742532 | click here |
| ochlerotatus | Yes | | | invertebrates | genus | 190765 | click here |
| ochlerotatus caspius | Yes | species | eukaryota | invertebrates | species | 120870 | click here |
| ochlerotatus cataphylla | Yes | species | eukaryota | invertebrates | species | 120871 | click here |
| ochlerotatus communis | Yes | species | eukaryota | invertebrates | species | 329099 | click here |
| ochlerotatus dorsalis | Yes | species | eukaryota | invertebrates | species | 663928 | click here |
| ochlerotatus sticticus | Yes | species | eukaryota | invertebrates | species | 120878 | click here |
| ochrotomys nuttalli | Yes | species | eukaryota | rodents | species | 56229 | click here |
| odobenus rosmarus | Yes | species | eukaryota | mammals | species | 9707 | click here |
| odobenus rosmarus divergens | Yes | subspecies | eukaryota | mammals | subspecies | 9708 | click here |
| odocoileus hemionus | Yes | species | eukaryota | mammals | species | 9872 | click here |
| odocoileus hemionus columbianus | Yes | subspecies | eukaryota | mammals | subspecies | 9873 | click here |
| odocoileus virginianus | Yes | species | eukaryota | mammals | species | 9874 | click here |
| odocoileus virginianus texanus | Yes | subspecies | eukaryota | mammals | subspecies | 9880 | click here |
| odontotermes | Yes | | | invertebrates | genus | 60587 | click here |
| olavius algarvensis | Yes | species | eukaryota | invertebrates | species | 188229 | click here |
| oligoryzomys longicaudatus | Yes | species | eukaryota | rodents | species | 137207 | click here |
| oligoryzomys microtis | Yes | species | eukaryota | rodents | species | 48008 | click here |
| oncorhynchus mykiss | Yes | species | eukaryota | vertebrates | species | 8022 | click here |
| ondatra zibethicus | Yes | species | eukaryota | rodents | species | 10060 | click here |
| onychomys leucogaster | Yes | species | eukaryota | rodents | species | 38668 | click here |
| ophisaurus ventralis | Yes | species | eukaryota | vertebrates | species | 102195 | click here |
| oreochromis niloticus | Yes | species | eukaryota | vertebrates | species | 8128 | click here |
| ornithodoros | Yes | | | invertebrates | genus | 6937 | click here |
| ornithodoros asperus | Yes | species | | | species | 1453431 | click here |
| ornithodoros brasiliensis | Yes | species | eukaryota | invertebrates | species | 888526 | click here |
| ornithodoros coriaceus | Yes | species | eukaryota | invertebrates | species | 92741 | click here |
| ornithodoros erraticus | Yes | species | eukaryota | invertebrates | species | 265619 | click here |
| ornithodoros faini | Yes | species | | | species | 1811739 | click here |
| ornithodoros hasei | Yes | species | | | species | 1826598 | click here |
| ornithodoros hermsi | Yes | species | eukaryota | invertebrates | species | 303297 | click here |
| ornithodoros marocanus | Yes | species | | | species | 1337745 | click here |
| ornithodoros moubata | Yes | species | eukaryota | invertebrates | species | 6938 | click here |
| ornithodoros occidentalis | Yes | species | | | species | 1339071 | click here |
| ornithodoros papillipes | Yes | species | eukaryota | invertebrates | species | 570971 | click here |
| ornithodoros parkeri | Yes | species | eukaryota | invertebrates | species | 140564 | click here |
| ornithodoros porcinus | Yes | species | eukaryota | invertebrates | species | 34594 | click here |
| ornithodoros rietcorreai | Yes | species | | | species | 1905324 | click here |
| ornithodoros rudis | Yes | species | | | species | 2058922 | click here |
| ornithodoros savignyi | Yes | species | eukaryota | invertebrates | species | 69826 | click here |
| ornithodoros sonrai | Yes | species | eukaryota | invertebrates | species | 352064 | click here |
| ornithodoros talaje | Yes | species | | | species | | click here |
| ornithodoros tartakovskyi | Yes | species | eukaryota | invertebrates | species | 570969 | click here |
| ornithodoros tholozani | Yes | species | | | species | 554291 | click here |
| ornithodoros turicata | Yes | species | eukaryota | invertebrates | species | 34597 | click here |
| ornithorhynchus anatinus | Yes | species | eukaryota | mammals | species | 9258 | click here |
| oryctes rhinoceros | Yes | species | eukaryota | invertebrates | species | 72550 | click here |
| oryctolagus cuniculus | Yes | species | eukaryota | mammals | species | 9986 | click here |
| oryzomys palustris | Yes | species | eukaryota | rodents | species | 37020 | click here |
| otariidae | Yes | | | mammals | family | 9702 | click here |
| otomops madagascariensis | Yes | species | eukaryota | mammals | species | 423244 | click here |
| otospermophilus beecheyi | Yes | species | eukaryota | rodents | species | 34862 | click here |
| ototylomys phyllotis | Yes | species | eukaryota | rodents | species | 143267 | click here |