Pseudomphala latericea (A. Adams, 1863)
Pseudomphala latericea miyazakii (T. Habe, 1943)
Omphalotropis laticosta J.F. Quadras& O.F. von Möllendorff, 1894
Omphalotropis latilabris J.F. Quadras& O.F. von Möllendorff, 1894
Omphalotropis layardiana A. Garrett, 1887
Taiwanassiminea lentula (W.S.S. Van Benthem-Jutting, 1963)
Assiminea leptodonta M. Connolly, 1922
Eussoia leptodonta (G. Nevill, 1881)
Austroassiminea letha G.A. Solem, H. Girardi& G.W. Kendrick, 1982
Pseudocyclotus levis (L. Pfeiffer, 1855)
Assiminea liaotungensis T. Habe, 1943
Paludinella littorea (E. Forbes & S.C.T. Hanley,1856)
Assiminea littorina (S. Delle Chiaje, 1828)
Omphalotropis longula A. Mousson, 1870
Assiminea lucida W.H. Pease, 1869
Assiminea lugubris W.H. Turton, 1932
Assiminea lutea (A. Adams, 1861)
Omphalotropis madagascariensis J. Germain, 1921
Omphalotropis margarita (L. Pfeiffer, 1851)
Assiminea marginata A. Leith, 1853
Valvatorbis mauritii (FOSSIL) J.C. Bequaert& W.J. Clench, 1936 †
Assiminea mesopotamica P. Glöer, M.D. Naser& Yasser, 2007
Assiminea microgaza (FOSSIL) J. Gardner, 1937 †
Assiminea microsculpta G. Nevill, 1880
Allepithema microstriatum J.T. Kuroda & T. Kano,1941
Paludinassiminea minima T. Habe, 1942
Anaglyphula minutissima W.J.M. Maassen, 2000
Ovassiminea miskellyi A. Hallan, H. Fukuda& Kameda, 2015
Paludinassiminea miyakoinsularis H. Minato, 1980
Assiminea moroccoensis E. Rolán, 2013
Assiminea morrisoni R.T. Abbott, 1958
Scalinella moussoni A. Garrett, 1884
Quadrasiella mucronata O.F. von Möllendorff,1894
Omphalotropis mutica O.F. von Möllendorff,1897
Allepithema nagayamai J.T. Kuroda, 1960