Revision of northeast Pacific Paleogene cypraeoidean gastropods, including recognition of three new species: implications for paleobiogeographic distribution and faunal turnover Author Groves, Lindsey Author Squires, Richard L. text PaleoBios 2023 2023-08-10 40 10 1 52 http://dx.doi.org/10.5070/p9401057774 journal article 10.5070/P9401057774 0031-0298 10913295 11600574-2B0E-4C13-BC08-A3A5EF9EE562 EOCYPRAEIDAE SCHILDER, 1924 A Remarks— Based on protoconch, teloconch, and shell morphology, Fehse (2013 , 2021 ) demonstrated that the Eocypraeidae should not be considered a subfamily within the Ovulidae . Eocypraeidae comprises the sub- families Eocypraeinae and Sulcocypraeinae. The authors have chosen to adopt this classification scheme until ad- ditional, more conclusive data become available. Lorenz and Fehse (2009) , Lorenz (2018) , Pacaud (2018b) , and Fehse (2021) all noted that this family is living today based on the presumption that Sphaerocypraea incomparabilis ( Briano, 1993 ) [originally described as Chimaeria incomparabilis ] is correctly placed. Indeed Briano’s spe- cies outwardly resembles members of Sphaerocypraea , but until conclusive molecular data and/or radular data can be obtained, thus affording correct systematic place- ment, it should be tentatively considered a living member of Sphaerocypraea .