Spiraculinella radiata (FOSSIL) C.O. Waterhouse, 1987 †
Planozone ramificans (FOSSIL) J. Perner, 1907 †
Angyomphalus regularis (FOSSIL) W.J. Gordon& E.L. Yochelson, 1987 †
Ananias regulocostata (FOSSIL) Yin & E.L. Yochelson,1983 †
Mourlonia reloba (FOSSIL) E.L. Yochelson & Dutro,1960 †
Dictyotomaria reticulatus (FOSSIL) (Girty, 1934 †)
Mourlonia retusa (FOSSIL) J. Perner, 1907 †
Ananias riccardii (FOSSIL) Pinilla, 2012 †
Baylea rigida (FOSSIL) Mazaev, 2015 †
Umbotropis rihai (FOSSIL) Frýda & K. Bandel, 1997 †
Peruvispira robusta (FOSSIL) C.O. Waterhouse, 1963 †
Spiroscala rockymontana (FOSSIL) (Girty, 1934 †)
Neilsonia roscobiensis (FOSSIL) A. Thomas, 1940 †
Latitaenia rotelloidea (FOSSIL) (E.F.R.K. Koken, 1896 †)
Deaechospira rotunda (FOSSIL) Hadding, 1913 †
Villmaria rotundata (FOSSIL) (F.A. Roemer, 1855 †)
Mourlonia rugulata (FOSSIL) (J.W. Hall, 1860 †)
Lunulazona sablei (FOSSIL) E.L. Yochelson & Dutro,1963 †
Pleurorima sandbergi (FOSSIL) (E.F.R.K. Koken, 1889 †)
Glabrocingulum sarrauti (FOSSIL) (Mansuy, 1912 †)
Dictyotomaria scitula (FOSSIL) (F.B. Meek& A.H. Worthen, 1860 †)
Winterbergiella semicostatus (FOSSIL) (G.A. Goldfuss, 1844 †)
Euryzone semilaevis (FOSSIL) (E.F.R.K. Koken, 1889 †)
Ananias seminudum (FOSSIL) W.J. Gordon& E.L. Yochelson, 1983 †
Odontomaria semiplicata (FOSSIL) (C.L.F. von Sandberger& C.L.F. von Sandberger, 1850 †)
Guizhouspira sequens (FOSSIL) (L. Waagen, 1880 †)
Balbinipleura sextalineata (FOSSIL) Heidelberger, 2001 †
Platyloron shaleri (FOSSIL) (Whidborne, 1892 †)
Wannerispira shangganensis (FOSSIL) (A. Kaim & A. Nützel,2010 †)
Spiroraphe shelvensis (FOSSIL) Pitcher, 1939 †
Ananias shikamai (FOSSIL) Nishida, 1969 †
Baylea sinuatus (FOSSIL) (Weller, 1916 †)
Spiroscala solida (FOSSIL) Hyde, 1953 †
Mourlonia species (FOSSIL) †
Glabrocingulum species (FOSSIL) †