†Pycnodonte (Crenostrea) Marwick 1931 (clam)
Bivalvia - Ostreida - Gryphaeidae
Alternative spelling: Crenostrea
Parent taxon: Pycnodonte according to M. C. Perrilliat 1994
Sister taxa: Gryphaea belli, Pycnodonte (Gigantostrea), Pycnodonte (Pegma), Pycnodonte (Phygraea), Pycnodonte (Pycnodonte), Pycnodonte amakusensis, Pycnodonte costei, Pycnodonte heermanni, Pycnodonte percrassa, Pycnodonte squarrosa, Pycnodonte trigonalis, Pycnodonte vesicularis
Subtaxa: Crenostrea segurai, Pycnodonte (Crenostrea) achanes, Pycnodonte (Crenostrea) antiguensis, Pycnodonte (Crenostrea) eldridgei, Pycnodonte (Crenostrea) stewarti, Pycnodonte (Crenostrea) verracruzana, Pycnodonte (Crenostrea) wuellerstorfi
Type: Ostrea wuellerstorfi
Ecology: stationary epifaunal suspension feeder