Nucleolaria, OYAMA, 1959

Groves, Lindsey & Squires, Richard L., 2023, Revision of northeast Pacific Paleogene cypraeoidean gastropods, including recognition of three new species: implications for paleobiogeographic distribution and faunal turnover, PaleoBios 40 (10), pp. 1-52 : 8

NUCLEOLARIA OYAMA, 1959

Type Species— Cypraea nucleus Linnaeus, 1758 , by original designation (of Oyama, 1959: p. 361); Holocene, Indo-Pacific (Red Sea and east Africa to southern Japan, Australia, French Polynesia, and Hawaiʻi) ( Groves 1994a).

Diagnosis— Shell small to medium in size; coarse to fine dorsal nodules with fine inter-nodular threads; prominent dorsal sulcus; coarse ribs on base of shell; fossula deep with strong dentition ( Jousseaume, 1884: p. 98).

Geologic Range— Middle Eocene through Holocene ( Groves 1994a).

Remarks— Jousseaume (1884: p. 98) originally de- scribed Nuclearia [non - Nuclearia Cienkowsky, 1865 , a freshwater amoeboid].