Allodiscus austrodimorphus R.K. Dell, 1955 New Zealand
Sinployea avanaensis G.A. Solem, 1983 Cook Islands
Rhophodon bairnsdalensis C.J. Gabriel, 1930 Australia, Victoria
Pulchridomus barbatulus (L.A. Reeve, 1852) New Zealand
Climocella barkeri J.F. Goulstone, 1997 New Zealand, North Island
Letomola barrenensis (W.F. Petterd, 1879) Tasmania
Allodiscus basilirata N.W. Gardner, 1967 New Zealand
Discocharopa bassi (J.W. Brazier, 1871) Australia
Trachycystis bathycoele (J.C. Melvill& J.H. Ponsonby, 1892) South Africa, Zululand
Allocharopa belli (J.C. Cox, 1864) Australia, Brigalow Belt
Loisthodon benhami (H.H. Suter, 1909) New Zealand, Auckland Islands
Charopa bianca F.W. Hutton, 1883 New Zealand
Ruthvenia biciliata (L. Pfeiffer, 1855) Sri Lanka
Ruthvenia bicincta (A.R.J.B. Bavay& P. Dautzenberg, 1912) Vietnam, Tonkin
Egestula bicolor (F.M. Climo, 1973) New Zealand
Cavellia biconcava (L. Pfeiffer, 1853) New Zealand, North Island
Helenodiscus bilamellatus unknown Saint Helena
Amphidoxa binneyana (L. Pfeiffer, 1847) Chile, Valdivia
Bischoffena bischoffensis (W.F. Petterd, 1879) Tasmania
Ptychodon blacki R.K. Dell, 1955 New Zealand
Allocharopa brazieri (J.C. Cox, 1868) New South Wales
Pseudegestula brookesi (R.K. Dell, 1954) New Zealand
Allodiscus brooki B.A. Marshall& G.M. Barker, 2008 New Zealand
Phenacohelix brooki J.F. Goulstone, 2001 New Zealand, North Island
Cavellia brouni (H.H. Suter, 1891) New Zealand, South Island
Cavellia buccinella (L.A. Reeve, 1852) New Zealand, Nelson
Trachycystis burnupi (J.C. Melvill& J.H. Ponsonby, 1903) South Africa
Stephacharopa calderaensis F.A.W. Miquel& J.F. Araya, 2013 Chile, Caldera
Pararhytida caledonica (J.C.H. Crosse, 1868)
Ruthvenia caliginosa (E.R. Sykes, 1898) Sri Lanka
Jokajdon callizonus Unknown Micronesia
Allodiscus camelinus B.A. Marshall& G.M. Barker, 2008 New Zealand, North Island
Ngairea canaliculata J. Stanisic, 1990 Queensland
Oreomava cannfluviatilus (C.J. Gabriel, 1929) Australia, Gippsland
Trachycystis capensis (L. Pfeiffer, 1841) South Africa6 mm