Ruedemannia aberrans (FOSSIL) (J. Perner, 1903 †)
Lophospira abnormis (FOSSIL) Ulrich & Scofield, 1897 †
Ectomaria adelina (FOSSIL) (Billings, 1865 †)
Ectomaria adventa (FOSSIL) (Butts, 1926 †)
Paupospira akpatokensis (FOSSIL) (Wilson, 1939 †)
Lophospira alata (FOSSIL) E.F.R.K. Koken& J. Perner, 1925 †
Lophospira alternans (FOSSIL) E.F.R.K. Koken& J. Perner, 1925 †
Worthenia alticarinata (FOSSIL) Batten, 1989 †
Gyronema altispiralis (FOSSIL) A.W. Grabau, 1922 †
Worthenia angulata (FOSSIL) (Münster, 1841 †)
Worthenia apunctata (FOSSIL) E.A.L. Kittl, 1894 †
Worthenia arizonensis (FOSSIL) Winters, 1963 †
Arjamannia aulangonensis (FOSSIL) Peel, 1975 †
Eunema badiotica (FOSSIL) E.A.L. Kittl, 1891 †
Worthenia basifalcata (FOSSIL) Korner, 1937 †
Paupospira beatrice (FOSSIL) (Foerste, 1914 †)
Arjamannia bellicarinata (FOSSIL) (J. Donald, 1906 †)
Ruedemannia bembexiformis (FOSSIL) G.B. Campbell & H. Engel,1963 †
Worthenia bialveozona (FOSSIL) Batten, 1989 †
Proturritella bicarinata (FOSSIL) (Wahlenberg, 1821 †)
Worthenia bicarinata (FOSSIL) Batten, 1989 †
Worthenia bieberi (FOSSIL) E.A.L. Kittl, 1891 †
Worthenia bilineata (FOSSIL) (Klipstein, 1843 †)
Lophospira bilirata (FOSSIL) (J.W. Hall, 1860 †)
Lophospira billingsi (FOSSIL) W.J. Raymond, 1905 †
Ruedemannia borkholmiensis (FOSSIL) (E.F.R.K. Koken, 1896 †)
Paupospira bowdeni (FOSSIL) (Safford, 1869 †)
Paupospira burginensis (FOSSIL) (Ulrich & Scofield,1897 †)
Worthenia cainallensis (FOSSIL) E.A.L. Kittl, 1899 †
Lophospira calcifera (FOSSIL) R.P. Whitfield, 1889 †
Ectomaria callahanensis (FOSSIL) (Rohr, 1980 †)
Batteniella calvata (FOSSIL) Mawson & al., 2002 †
Arjamannia cancellatula (FOSSIL) (Sedgwick & F. McCoy,1855 †)
Lophospira caradociana (FOSSIL) Harper †
Manzanospira carinata (FOSSIL) Batten, 1989 †