Bivalvia - Ostreida - Gryphaeidae
Parent taxon: Pycnodonte according to Sacco 1897
Sister taxa: Gryphaea belli, Pycnodonta frauscheri, Pycnodonta rarilamella, Pycnodonta vesicularis, Pycnodonte (Costeina), Pycnodonte (Crenostrea), Pycnodonte (Pegma), Pycnodonte (Phygraea), Pycnodonte (Pycnodonte), Pycnodonte amakusensis, Pycnodonte costei, Pycnodonte erici, Pycnodonte ewekoroensis, Pycnodonte gryphovicinus, Pycnodonte heermanni, Pycnodonte loeli, Pycnodonte nigeriensis, Pycnodonte percrassa, Pycnodonte squarrosa, Pycnodonte trigonalis, Pycnodonte vesicularis
Subtaxa: Pycnodonte (Gigantostrea) leeana
Ecology: stationary epifaunal suspension feeder
Distribution:
• Miocene of United States (3: Florida, North Carolina collections)
Total: 3 collections each including a single occurrence