| bituminaria bituminosa | Yes | species | eukaryota | plants | species | 53836 | click here |
| bivalvia | Yes | | | invertebrates | class | 6544 | click here |
| blarina brevicauda | Yes | species | eukaryota | mammals | species | 9387 | click here |
| blastocerus dichotomus | Yes | species | eukaryota | mammals | species | 248133 | click here |
| blastophaga nipponica | Yes | species | eukaryota | invertebrates | species | 142684 | click here |
| blastophaga psenes | Yes | species | eukaryota | invertebrates | species | 150937 | click here |
| blattella | Yes | | | invertebrates | genus | 6972 | click here |
| blattella germanica | Yes | species | eukaryota | invertebrates | species | 6973 | click here |
| blattodea | Yes | | | invertebrates | order | 85823 | click here |
| blissus insularis | Yes | species | | | species | 1202958 | click here |
| blommersia blommersae | Yes | species | eukaryota | vertebrates | species | 160222 | click here |
| blommersia grandisonae | Yes | species | eukaryota | vertebrates | species | 143588 | click here |
| boehmeria nivea | Yes | species | eukaryota | plants | species | 83906 | click here |
| boehmeria platanifolia | Yes | species | eukaryota | plants | species | 172313 | click here |
| boesenbergia rotunda | Yes | species | eukaryota | plants | species | 97729 | click here |
| bombus hypocrita | Yes | species | eukaryota | invertebrates | species | 130701 | click here |
| bombus lucorum | Yes | species | eukaryota | invertebrates | species | 30193 | click here |
| bombus pascuorum | Yes | species | eukaryota | invertebrates | species | 65598 | click here |
| bombus sonorus | Yes | species | eukaryota | invertebrates | species | 203818 | click here |
| bombus terrestris | Yes | species | eukaryota | invertebrates | species | 30195 | click here |
| bombyx mandarina | Yes | species | eukaryota | invertebrates | species | 7092 | click here |
| bombyx mori | Yes | species | eukaryota | invertebrates | species | 7091 | click here |
| boophilus | Yes | | | invertebrates | subgenus | 6940 | click here |
| boophilus calcaratus | Yes | species | | | species | | click here |
| boophis albilabris | Yes | species | eukaryota | vertebrates | species | 127642 | click here |
| boophis ankaratra | Yes | species | eukaryota | vertebrates | species | 169020 | click here |
| boophis boehmei | Yes | species | eukaryota | vertebrates | species | 252284 | click here |
| boophis bottae | Yes | species | eukaryota | vertebrates | species | 161859 | click here |
| boophis burgeri | Yes | species | eukaryota | vertebrates | species | 143497 | click here |
| boophis elenae | Yes | species | eukaryota | vertebrates | species | 321777 | click here |
| boophis goudotii | Yes | species | eukaryota | vertebrates | species | 169023 | click here |
| boophis guibei | Yes | species | eukaryota | vertebrates | species | 321779 | click here |
| boophis idae | Yes | species | eukaryota | vertebrates | species | 252281 | click here |
| boophis luciae | Yes | species | eukaryota | vertebrates | species | 743288 | click here |
| boophis luteus | Yes | species | eukaryota | vertebrates | species | 127643 | click here |
| boophis madagascariensis | Yes | species | eukaryota | vertebrates | species | 127644 | click here |
| boophis marojezensis | Yes | species | eukaryota | vertebrates | species | 169026 | click here |
| boophis pyrrhus | Yes | species | eukaryota | vertebrates | species | 321790 | click here |
| boophis quasiboehmei | Yes | species | | | species | 1070680 | click here |
| boophis rhodoscelis | Yes | species | eukaryota | vertebrates | species | 321792 | click here |
| boophis roseipalmatus | Yes | species | eukaryota | vertebrates | species | 748778 | click here |
| boophis tasymena | Yes | species | eukaryota | vertebrates | species | 321798 | click here |
| boophis tephraeomystax | Yes | species | eukaryota | vertebrates | species | 68440 | click here |
| boophis viridis | Yes | species | eukaryota | vertebrates | species | 161860 | click here |
| boophis williamsi | Yes | species | eukaryota | vertebrates | species | 321794 | click here |
| bos grunniens | Yes | species | eukaryota | mammals | species | 30521 | click here |
| bos indicus | Yes | species | eukaryota | mammals | species | 9915 | click here |
| bos indicus x bos taurus | Yes | no rank | eukaryota | mammals | species | 30522 | click here |
| bos mutus | Yes | species | eukaryota | mammals | species | 72004 | click here |
| bos primigenius | Yes | species | eukaryota | mammals | species | 9909 | click here |
| bos taurus | Yes | species | eukaryota | mammals | species | 9913 | click here |
| bos taurus x bos indicus | Yes | no rank | eukaryota | mammals | species | 30523 | click here |
| bossiaea ensata | Yes | species | | | species | 466218 | click here |
| bossiaea eriocarpa | Yes | species | | | species | 1560052 | click here |
| bossiaea foliosa | Yes | species | | | species | 1447085 | click here |
| botanophila | Yes | | | invertebrates | genus | 392042 | click here |
| bothriochloa ischaemum | Yes | species | eukaryota | plants | species | 29660 | click here |
| bothriocroton auruginans | Yes | species | eukaryota | invertebrates | species | 188736 | click here |
| bothriocroton concolor | Yes | species | eukaryota | invertebrates | species | 65640 | click here |
| bothriocroton hydrosauri | Yes | species | eukaryota | invertebrates | species | 59643 | click here |
| bothroponera perroti | Yes | species | eukaryota | invertebrates | species | 613744 | click here |
| botryococcus braunii | Yes | species | eukaryota | plants | species | 38881 | click here |
| bougainvillea | Yes | | | plants | genus | 3540 | click here |
| bovicola bovis | Yes | species | eukaryota | invertebrates | species | 160097 | click here |
| bovicola caprae | Yes | species | | | species | 1647116 | click here |
| bovicola limbata | Yes | species | | | species | 1514855 | click here |
| bovicola ovis | Yes | species | eukaryota | invertebrates | species | 186214 | click here |
| bovidae | Yes | | | mammals | family | 9895 | click here |
| bovinae | Yes | | | mammals | subfamily | 27592 | click here |
| bowdichia virgilioides | Yes | species | eukaryota | plants | species | 149685 | click here |
| brachiaria | Yes | | | plants | genus | 59786 | click here |
| brachionus plicatilis | Yes | species | eukaryota | invertebrates | species | 10195 | click here |
| brachyderes incanus | Yes | species | eukaryota | invertebrates | species | 201802 | click here |
| brachymyrmex depilis | Yes | species | eukaryota | invertebrates | species | 354278 | click here |
| brachyphylla cavernarum | Yes | species | eukaryota | mammals | species | 9421 | click here |
| brachyplatys subaeneus | Yes | species | eukaryota | invertebrates | species | 355284 | click here |
| brachystegia boehmii | Yes | species | eukaryota | plants | species | 508986 | click here |
| brachythemis contaminata | Yes | species | eukaryota | invertebrates | species | 342759 | click here |
| brachyunguis convolvulisucta | Yes | species | | | species | 718265 | click here |
| braconidae | Yes | | | invertebrates | family | 7402 | click here |
| bradinopyga geminata | Yes | species | | | species | 1148302 | click here |
| bradypus | Yes | | | mammals | genus | 9353 | click here |
| bradypus tridactylus | Yes | species | eukaryota | mammals | species | 9354 | click here |
| bradypus variegatus | Yes | species | eukaryota | mammals | species | 9355 | click here |
| brassica napus | Yes | species | eukaryota | plants | species | 3708 | click here |
| brassica oleracea | Yes | species | eukaryota | plants | species | 3712 | click here |
| brassica oleracea var. botrytis | Yes | varietas | eukaryota | plants | varietas | 3715 | click here |
| brassica oleracea var. capitata | Yes | varietas | eukaryota | plants | varietas | 3716 | click here |
| brassica rapa | Yes | species | eukaryota | plants | species | 3711 | click here |
| brassica rapa subsp. pekinensis | Yes | subspecies | eukaryota | plants | subspecies | 51351 | click here |
| brassica rapa var. parachinensis | Yes | varietas | eukaryota | plants | varietas | 320797 | click here |
| brassica rapa var. perviridis | Yes | varietas | eukaryota | plants | varietas | 344680 | click here |
| brevicoryne brassicae | Yes | species | eukaryota | invertebrates | species | 69196 | click here |
| brevipalpus yothersi | Yes | species | | | species | 1754060 | click here |
| briareum | Yes | | | invertebrates | genus | 86542 | click here |
| brontispa longissima | Yes | species | eukaryota | invertebrates | species | 111217 | click here |
| brucea javanica | Yes | species | eukaryota | plants | species | 210348 | click here |
| bruchinae | Yes | | | invertebrates | subfamily | 64387 | click here |
| brugia malayi | Yes | species | eukaryota | invertebrates | species | 6279 | click here |
| brugia pahangi | Yes | species | eukaryota | invertebrates | species | 6280 | click here |