Semeloidea abdiplex (FOSSIL) (J. Marwick, 1931 †)
Erycina actinophora (FOSSIL) (W.H. Dall, 1900 †)
Melliteryx acupuncta (C. Hedley, 1902)
Byssobornia adamsi (M. Yokoyama, 1924)
Lasaea adansoni W.H. Dall, 1899
Aligena aequata (FOSSIL) T.A. Conrad, 1843 †
Erycina affinis (FOSSIL) G.P. Deshayes, 1858 †
Rochefortia agulhasensis S.G.A. Jaeckel& K.H.J. Thiele, 1931
Arthritica ambotruncata (FOSSIL) C.R. Laws, 1944 †
Melliteryx angulata (FOSSIL) C.R. Laws, 1936 †
Hemilepton aotea (FOSSIL) P.A. Maxwell, 1992 †
Erycina arcta (FOSSIL) G.P. Deshayes, 1858 †
Waldo arthuri P.H. Valentich-Scott, D. Ó Foighil& J. Li, 2013
Erycina aturensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1911 †
Myllita auriculata E.A. Smith, 1891
Erycina australis G.P. Deshayes, 1856
Lasaea australis (J.B.P.A. Lamarck, 1818)
Lepton australis G.F. Angas, 1878
Rochefortia australis (C. Vélain, 1877)
Macrodiceras balaklavense (FOSSIL) (Pcelincev, 1959 †)
Myllita bartrumi (FOSSIL) (C.R. Laws, 1940 †)
Planikellya baudoni (FOSSIL) (G.P. Deshayes, 1858 †)
Myllita benthicola B.C. Cotton & F.C. Godfrey,1938
Rochefortia beringensis (W.H. Dall, 1916)
Erycina bernayi (FOSSIL) G.P. Deshayes, 1858 †
Semeloidea bexhavenensis (FOSSIL) Saether, Sha Jingeng, C. Little& K.A. Campbell, 2016 †
Cymatioa bibsae (G.W. Nowell-Usticke,1969)
Diarmaidia bidentata (Montague, 1803)
Borniola bidentifera (A.W.B. Powell, 1933)
Arthritica bifurca (W.H. Webster, 1908)
Borniola brevitas (FOSSIL) (C.R. Laws, 1944 †)
Neaeromya californica (W.H. Dall, 1899)
Myllita calva C.F. Laseron, 1956
Erycina calvertensis (FOSSIL) L.C. Glenn, 1904 †
Melliteryx capensis (G.B. III Sowerby, 1889)