Classification of the genus Crenostrea
Subg. †Pycnodonte (Crenostrea) Marwick 1931
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†Crenostrea eldridgei Arnold 1907
†Crenostrea segurai Woodring 1976
†Pycnodonte (Crenostrea) achanes Woodring 1982
†Pycnodonte (Crenostrea) antiguensis Brown 1913
†Pycnodonte (Crenostrea) verracruzana Perrilliat 1994
†Pycnodonte (Crenostrea) wuellerstorfi Zittel 1864