Leptomphalus subcircularis (FOSSIL) (Mansuy, 1913 †)
Straparollus subdionysii (FOSSIL) P.A. Maxwell, 1961 †
Euomphalus subplanus (FOSSIL) J.W. Hall, 1852 †
Amphiscapha subquadrata (FOSSIL) (F.B. Meek& A.H. Worthen, 1870 †)
Amphiscapha subrugosa (FOSSIL) (F.B. Meek& A.H. Worthen, 1873 †)
Amphiscapha subsulcata (FOSSIL) (Knight, 1934 †)
Euomphalus subtrigonalis (FOSSIL) Whidborne, 1891 †
Anisostoma suessi (FOSSIL) (M. Hörnes, 1855 †)
Euomphalus sulcatus (FOSSIL) Kayser, 1873 †
Discotropis sulcifer (FOSSIL) (Girty, 1909 †)
Euomphalus sumatrensis (FOSSIL) F.A. Roemer, 1880 †
Straparollus tabulatus (FOSSIL) (Phillips) †
Euomphalus telleri (FOSSIL) E.A.L. Kittl, 1891 †
Sinutropis tenera (FOSSIL) J. Perner, 1903 †
Euomphalus tenuistriatus (FOSSIL) Zhu, 1995 †
Cylicioscapha texana (FOSSIL) E.L. Yochelson, 1956 †
Pleuronotus tioga (FOSSIL) (J.W. Hall, 1876 †)
Euomphalopterus togata (FOSSIL) (Lindström, 1884 †)
Euomphalus trigonalis (FOSSIL) G.A. Goldfuss, 1844 †
Euomphalus triliris (FOSSIL) Easton, 1943 †
Euomphalus tuberculatus (FOSSIL) Tolmachoff, 1930 †
Sinutropis tubus (FOSSIL) (Lindström, 1884 †)
Rhabdotocochlis turgida (FOSSIL) E.K. Yoo, 1994 †
Discotropis turritus (FOSSIL) (Delpey, 1941 †)
Straparollus turritus (FOSSIL) C.L.F. von Sandberger& C.L.F. von Sandberger, 1855 †
Euomphalus uedai (FOSSIL) Murata, 1969 †
Straparollus ultimus (FOSSIL) E.A.L. Kittl, 1891 †
Euomphalus umbilicatus (FOSSIL) F.B. Meek & A.H. Worthen,1860 †
Kiaeromphalus undiferus (FOSSIL) (A. Schmidt, 1858 †)
Euomphalopterus undulans (FOSSIL) (Lindström, 1884 †)
Amphiscapha uralensis (FOSSIL) Licharev, 1975 †
Euomphalus utahensis (FOSSIL) J.W. Hall& R.P. Whitfield, 1877 †
Euomphalopterus valeria (FOSSIL) (Billings, 1865 †)
Euomphalus variabilis (FOSSIL) Jeffery & al., 1994 †
Nummocalcar varicosum (FOSSIL) (Morris & Lycett) †