Mactromeris polynyma (W. Stimpson, 1860)
Mactromeris polynyma alaskana (W.H. Dall, 1894)
Mactromeris polynyma voyi (W.M. Gabb, 1866)
Mactromeris ramonensis (FOSSIL) A. Packard & Clark,1915 †
Mactromeris rushi (FOSSIL) Wagner & Schilling,1923 †
Mactromeris sectoris (FOSSIL) Anderson & Martin, 1914 †
Mactromeris tejonensis (FOSSIL) A. Packard, 1916 †
Mactromeris triangulata (FOSSIL) L.S. Zhidkova, 1994 †
Mulinia bicolor J.E. Gray, 1837
Mulinia byronensis Gray, 1837
Mulinia chilota (FOSSIL) D. Frassinetti, 1997 †
Mulinia cleryana (A.V.M.D. D'Orbigny,1846)
Mulinia cleryana branneri W.H. Dall, 1901
Mulinia congesta (FOSSIL) (T.A. Conrad, 1833 †)
Mulinia edulis (King, 1831)
Mulinia exalbida J.E. Gray, 1837
Mulinia lateralis (T. Say, 1822)
Mulinia levicardo (E.A. Smith, 1881)
Mulinia modesta (P.P. Carpenter, 1864)
Mulinia orthria (FOSSIL) Gardner 1928 †
Mulinia pallida (W.J. Broderip& G.B. I Sowerby, 1829)
Mulinia pontchartrainensis J.P.E. Morrison, 1965
Mulinia sapotilla (FOSSIL) W.H. Dall, 1898 †
Oxyperas aspersa (G.B. I Sowerby, 1825)
Oxyperas belliana (W.R.B. Oliver, 1915)
Oxyperas bernardi (H.A. Pilsbry, 1904)
Oxyperas callistoides (FOSSIL) A.A. Olsson, 1928 †
Oxyperas coppingeri (E.A. Smith, 1884)
Oxyperas deserta (FOSSIL) A.A. Olsson, 1928 †
Oxyperas egena (L.A. Reeve, 1854)
Oxyperas elongata (J.R.C. Quoy& J.P. Gaimard, 1835)
Oxyperas exensis (FOSSIL) P.A. Maxwell, 1978 †
Oxyperas flemingi (FOSSIL) Marwick 1960 †
Oxyperas leda (FOSSIL) (Finlay, 1924 †)
Oxyperas lentiginosa (A.A. Gould, 1852)
Oxyperas parinensis (FOSSIL) A.A. Olsson, 1928 †
Oxyperas proaspersa (FOSSIL) (F. Sacco, 1901 †)
Oxyperas steinmanni (FOSSIL) A.A. Olsson, 1931 †