- babcocki
- bangsi
- barbel
- barbouri
- basement membrane
- basioccipital
- basisphenoid
- baska
- Batagur
- Batrachemys
- bauri
- bealei
- bechuanicus
- becki
- belliana
- bergeri
- berlandieri
- biarmed
- bibroni
- bicallosite
- bicolored
- bilateral
- bissa
- blandingii
- blastopore
- blastula
- body pit
- boettgeri
- borneensis
- boulengeri
- bourreti
- branderhorsti
- brasiliensis
- bridge
- bridge bones
- broadleyi
- brygooi
- buttress