Ba
- Babakina
- Babella
- Babelomurex
- Babylonia
- Babyloniidae
- Bacteridium
- Bactrocythara
- Bactronophorus
- Bacula
- Badepigrus
- Baeolidia
- Baicalancylus
- Baicalia
- Baicaliidae
- Bailya
- Bajaeolis
- Balanocochlis
- Balconorbis
- Balkanospeum
- Bankia
- Bankivia
- Baptodoris
- Barbatia
- Barbierella
- Barbitonia
- Barleeia
- Barleeiidae
- Barnardaclesia
- Barnea
- Barneystrombus
- Baroginella
- Barrimysia
- Bartlettia
- Bartschia
- Barycypraea
- Barymactra
- Barynaias
- Barythaerus
- Basedowena
- Basiliomya
- Basilissopsis
- Basisulcata
- Bassethullia
- Bassina
- Basterotia
- Basterotiidae
- Basterotina
- Bathanalia
- Batheulima
Bathia Robson, 1914
- Bathia madagascariensis Robson, 1914
Mollusca → Gastropoda → Pulmonata → Helicarionoidea → Helicarionidae → Helicarioninae
- Bathothauma
- Bathoxiphus
- Bathyacmaea
- Bathyaltum
- Bathyancistrolepis
- Bathyarca
- Bathyaustriella
- Bathybela
- Bathybembix
- Bathyberthella
- Bathybuccinum
- Bathycadulus
- Bathycardita
- Bathychiton
- Bathycorbis
- Bathycrinicola
- Bathydomus
- Bathydorididae
- Bathydoridoidea
- Bathydoris
- Bathyfautor
- Bathyferula
- Bathylepeta
- Bathymargarites
- Bathymodiolus
- Bathymophila
- Bathyneaera
- Bathynerita
- Bathyomphalus
- Bathypelta
- Bathyphytophilidae
- Bathyphytophilus
- Bathypolypus
- Bathypurpurata
- Bathysciadiidae
- Bathysciadium
- Bathyspinula
- Bathyspinulidae
- Bathytellina
- Bathyteuthidae
- Bathyteuthis
- Bathyteuthoidea
- Bathytoma
- Bathytormus
- Bathyxylophila
- Batillaria
- Batillariidae
- Batissa
- Baudinella
- Bayardella
- Bayerius
- Bayerotrochus
Be
- Beddomeia
- Bedeva
- Beguina
Bekkochlamys Habe, 1958
- Bekkochlamys dulcis Pilsbry, 1902
- Bekkochlamys koshikijimana Pilsbry & Hirase, 1904
- Bekkochlamys micrograpta Pilsbry, 1900
- Bekkochlamys shikokuensis Pilsbry & Hirase, 1903
Mollusca → Gastropoda → Pulmonata → Helicarionoidea → Helicarionidae
- Bela
- Belalora
- Belaturricula
Kohorta Belemnoidea Gray, 1849 †
- Belemnoida Gray, 1849 †
Mollusca → Conchifera → Cyrtosoma → Cephalopoda → Coleoidea
- Belgrandia
- Belgrandiella
- Bellacythara
- Bellamya
- Bellascintilla
- Bellaspira
- Bellastraea
- Belomitra
- Belomitridae
- Bembicium
- Benedictia
- Benhamina
- Benimakia
- Bentharca
- Bentheledone
- Benthobia
- Benthobrookula
- Benthocardiella
- Benthoclionella
- Benthoctopus
- Benthodorbis
- Benthofascis
- Benthomangelia
- Benthomodiolus
- Benthonella
- Benthonellania
- Benthoquetia
- Benthoxystus
- Berghia
- Beringius
- Beringophysa
- Berlanguella
- Bernardina
- Berthais
- Berthelinia
- Berthella
- Berthellina
- Besla
Bi
- Bicatillus
- Bifurcium
- Biomphalaria
- Biomphalopa
- Biplex
- Birasoherpia
- Birgella
- Bischoffena
- Biserramenia
- Bistolida
- Bithynia
- Bithyniidae
- Bittiolum
- Bittium
Razred Bivalvia Linnaeus, 1758; (školjkaši)
- Bivalvia incertae sedis
- Heterodonta Neumayr, 1884
- Palaeoheterodonta Newell, 1965
- Protobranchia Pelseneer, 1889
- Pteriomorphia Beurlen, 1944
- Bivetiella
- Bivetopsia
- Biwakovalvata
- Bizetiella
Bl
- Blanfordia
- Blasicrura
- Blauneria
Bo
- Bogasonia
- Bogia
- Boissevainia
- Boleana
- Bolinus
- Bolitaena
- Bolitaenidae
- Bolitaenoidea
- Bolma
- Bonellitia
- Bonisa
- Bonus
- Boonea
- Booneostrea
- Boreacola
- Boreoberthella
- Boreochiton
- Boreocingula
- Boreoelona
- Boreoscala
- Boreotrophon
- Bornella
- Bornellidae
- Bornia
- Borniola
- Borsonella
- Borsonia
- Borsoniidae
- Borysthenia
- Boschitestella
- Bosellia
- Boselliidae
- Bostrycapulus
- Botelloides
- Bothriembryon
- Bothropoma
- Botryphallus
- Botula
- Bouchetispira
- Bouchetispiridae
- Bouchetriphora
- Bourdotia
- Bouryiscala
Br
- Bracenica
- Brachidontes
- Brachiomya
- Brachioteuthidae
- Brachioteuthis
- Brachycythara
- Brachypyrgulina
- Brachytoma
- Bractechlamys
- Brasityphis
- Brazieresta
- Brazzaea
- Brechites
- Brephodrillia
- Bretskya
- Brevinucula
Passeriformes Hyman, 2007
- Brevisentis atratus Hyman, 2007
Mollusca → Gastropoda → Pulmonata → Helicarionoidea → Helicarionidae
- Bridouxia
- Brocchinia
- Broderipia
- Brondelia
- Brookesena
- Brookula
- Brotia
- Bruceiella
- Bryopa
Bu
- Bucardium
- Buccinanops
- Buccinaria
- Buccinidae
- Buccinoidea
- Buccinulum
- Buccinum
- Buccipagoda
- Buchanania
- Bucharamnicola
- Buchema
- Buffetia
- Bufonaria
- Bulbus
- Bulimeulima
- Bulimnaea
- Bulimulidae
- Bulinus
- Bulla
- Bullacta
- Bullata
- Bullia
- Bullidae
- Bullina
- Bullinidae
- Bulloidea
- Burchia
- Buridrillia
- Burnaia
- Burnupena
- Burnupia
- Bursa
- Bursatella
- Bursidae
- Bursina
- Bushia
- Busycon
- Busycotypus
By
- Byssanodonta
- Byssobornia
- Bythinella
- Bythiospeum
- Bythosphaera