- Bacchites
- Bactrites
- Baculina
- Baculites
- Badiotites
- Bagnolites
- Balatonites
- Balearites
- Balkanites
- Balticeras
- Balvia
- Bamyaniceras
- Baronnites
- Barrandeites
- Barremites
- Barroisiceras
- Baschkirites
- Bashkortoceras
- Baskaniiceras
- Basleoceras
- Bauchioceras
- Bayleites
- Beaniceras
- Beatites
- Beleutoceras
- Beloceras
- Benacoceras
- Beneckeia
- Benueites
- Berbericeras
- Berniceras
- Berriasella
- Berrosiceras
- Betyokites
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- Beudanticeras
- Beudantiella
- Bevahites
- Beyrichites
- Beyrichoceras
- Beyrichoceratoides
- Bhimaites
- Bifericeras
- Bigotites
- Bihenduloceras
- Bilinguites
- Billcobbanoceras
- Biloclymenia
- Biltnerites
- Binatisphinctes
- Binneyites
- Biplices
- Bisatoceras
- Blanfordiceras
- Bochianites
- Bodylevskites
- Boehmoceras
- Boesites
- Bogdanoceras
- Bollandites
- Bollandoceras
- Boreomeekoceras
- Borissjakoceras
- Borkinia
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- Bornhardticeras
- Bosnites
- Bostrychoceras
- Boucaulticeras
- Bouleiceras
- Bradfordia
- Brahmaites
- Bramkampia
- Brancoceras
- Branneroceras
- Branneroceratoides
- Brasilia
- Bredyia
- Brevikites
- Brewericeras
- Brightia
- Brodieia
- Brotheotrachyceras — originally published as a subgenus of Trachyceras
- Brouwerites
- Buchiceras
- Budaiceras
- Buddhaites
- Bukowskiites
- Bullatimorphites
- Bulogites
- Bunburyiceras
- Burckhardites
- Burijites
- Busnardoites
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