Babyrousa babyrussa (Linnaeus, 1758)
Bainoceratops sp. (Tereschenko and Alifanov, 2003) – synoniem of Protoceratops sp. (Granger and Gregory, 1923)
Balaenoptera borealis Lesson, 1828
Balaenoptera musculus (Linnaeus, 1758)
Balearica pavonina (Linnaeus, 1758)
Balistoides conspicillum (Bloch & Schneider, 1801)
Barnardius zonarius (Shaw, 1805)
Basilornis celebensis (Gray, 1861)
Basilosaurus sp. Harlan (1834)
Bassariscus astutus (Lichtenstein, 1830)
Bathynomus giganteus A. Milne-Edwards, 1879
Bathypolypus sponsalis (P. Fischer & H. Fischer, 1892)
Belone belone (Linnaeus, 1760)
Beltanelliformis brunsae Menner 1974
Benthosuchus sushkini (Efremov 1929)
Berberomeloe majalis (Linnaeus, 1758)
Bison alticornus (Marsh, 1889) – synoniem of Triceratops horridus Marsh 1889
Bison bonasus (Linnaeus, 1758)
Bispira crassicornis (Sars, 1851) – synoniem of Sabella crassicornis Sars, 1851
Bitis gabonica (Duméril, Bibron & Duméril, 1854)
Bjerkandera fumosa (Pers.) P.Karst.
Boa constrictor Linnaeus, 1758
Bolinus beyrichi (von Koenen, 1889)
Bombus veteranus Fabricius, 1793
Bombycilla garrulus (Linnaeus, 1758)
Bos primigenius (Bojanus, 1827)
Boselaphus tragocamelus (Pallas, 1766)
Botaurus stellaris (Linnaeus, 1758)
Brachypelma smithi (Pickard-Cambridge, 1897)
Brachyphylla cavernarum Gray, 1834
Bradypus tridactylus Linnaeus, 1758
Branta bernicla (Linnaeus, 1758)
Branta leucopsis (Bechstein, 1803)
Branta ruficollis (Pallas, 1769)
Branta sandvicensis (Vigors, 1834)
Brocchinia reducta Baker (1882)
Bubalus bubalis (Linnaeus, 1758)
Bubalus depressicornis (Smith, 1827)
Bubalus palaeokerabau Dubois, 1908
Bubo scandiacus (Linnaeus, 1758)
Buccinum undatum Linnaeus, 1758
Buceros hydrocorax Linnaeus, 1766
Bucorvus leadbeateri (Vigors, 1825)
Bufo terrestris (Bonnaterre, 1789) – synoniem of Anaxyrus terrestris (Bonnaterre, 1789)