B
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- Bactrosaurus
- Bagaceratops
- Bagaraatan
- Bahariasaurus
- Bainoceratops
- "Bakesaurus" (nomen nudum)
- Balaur
- Balochisaurus
- Bambiraptor
- "Bananabendersaurus"
- Banji
- Baotianmansaurus
- Barapasaurus
- Barilium
- Barosaurus
- Barrosasaurus
- Barsboldia
- Baryonyx
- "Bashunosaurus" (nomen nudum)
- Basutodon - rauizuch
- Baurutitan
- Bayosaurus
- Becklespinax
- Beelemodon (nomen nudum)
- Beipiaosaurus
- Beishanlong
- Bellusaurus
- Belodon
- Berberosaurus
- Betasuchus (nomen dubium) = Megalosaurus
- Bienosaurus
- Bihariosaurus
- Bilbeyhallorum = Cedarpelta
- Bison (nomen dubium)
- Bissektipelta
- Bistahieversor
- Blancocerosaurus (nomen nudum) = Giraffatitan/Brachiosaurus
- Blikanasaurus
- Bolong
- Bonatitan
- Bonitasaura
- Borealosaurus
- Borogovia
- Bothriospondylus
- Brachiosaurus
- Brachyceratops (nomen dubium) = Rubeosaurus
- Brachylophosaurus
- Brachypodosaurus
- Brachyrophus = Camptosaurus
- Brachytaenius = Geosaurus (krokodyl)
- Brachytrachelopan
- Bradycneme = Elopteryx
- Breviceratops
- Brohisaurus
- Brontomerus
- "Brontoraptor" (nomen nudum) =?Torvosaurus
- Brontosaurus = Apatosaurus
- Bruhathkayosaurus (nomen dubium =?Titanosaurus
- Bugenasaura
- Buitreraptor
- Byranjaffia = Byronosaurus
- Byronosaurus