Eratoidea watsoni (W.H. Dall, 1881)
Volvarina weissmannae J.A. Ortea, 2014
Protoginella wentworthii (FOSSIL) (J.E. Tenison-Woods,1877 †)
Marginella werneri L. Bozzetti, 1993
Marginella westhuizeni W. Massier, 1993
Protoginella whitecliffensis (FOSSIL) (J. Marwick, 1931 †)
Prunum willcoxianum (FOSSIL) W.H. Dall, 1890 †
Prunum woodbridgei (L.G. Hertlein& A.M. Strong, 1951)
Dentimargo wormaldi (A.W.B. Powell, 1971)
Volvarina xamaneki J. Espinosa & J.A. Ortea,2015
Serrata xanthophaes (FOSSIL) J. Gardner, 1937 †
Marginella xhosa W. Liltved & V.G. Millard,1994
Glabella xicoi (F. Boyer, P. Ryall& A. Wakefield, 1999)
Tateshia yadai S. Kosuge, 1986
Volvarina yani J. Espinosa & J.A. Ortea,2012
Volvarina yayaeli J. Espinosa, J.A. Ortea& L. Moro, 2009
Volvarina yolandae J. Espinosa & J.A. Ortea,2000
Glabella youngi (R.N. Kilburn, 1977)
Dentimargo yucatecanus (W.H. Dall, 1881)
Volvarina yunkaxi J. Espinosa & J.A. Ortea,2015
Dentimargo zaidettae J. Espinosa & J.A. Ortea,2000
Granulina zanclea Bogi, Boyer, Renda& Giacobbe, 2016
Dentimargo zanzibarica L. Bozzetti, 1997
Demissa zanzibarica F. Boyer, 2016
Volvarina zatzae J.A. Ortea, 2014
Marginella zebroides S.G. Veldsman, 2013
Dentimargo zetetes B. Roth, 1978
Alaginella zeyheri (C.F.F. von Krauss, 1852)
Volvarina zonata (L.C. Kiener, 1841)
Volvarina zonata kraussi W.H. Turton, 1932
Marginella zulu S.G. Veldsman, 2017