Bivalvia - Ostreida - Gryphaeidae
Parent taxon: Exogyra according to Say 1820
Sister taxa: Exogyra (Aetostreon), Exogyra (Costagyra), Exogyra africana, Exogyra americana, Exogyra auriformis, Exogyra californica, Exogyra clarki, Exogyra columbella, Exogyra conica, Exogyra contorta, Exogyra davidsoni, Exogyra ganhamoroba, Exogyra griepenkerli, Exogyra inornata, Exogyra lancha, Exogyra miotaurinensis, Exogyra mutatoria, Exogyra ostracina, Exogyra overwegi, Exogyra ponderosa, Exogyra quitmanensis, Exogyra reedi, Exogyra scheibei, Exogyra sergipensis, Exogyra solea, Exogyra tamaulipana, Exogyra upatoiensis, Exogyra wetzleri, Exogyra woolmani, Exogyra yabei
Subtaxa: Exogyra (Exogyra) costata
Ecology: stationary epifaunal suspension feeder
Distribution:
• Paleocene of United States (1: Alabama collection)
• Cretaceous of Mexico (1), North Atlantic (1), United States (310: Alabama, Arkansas, Delaware, Georgia, Maryland, Mississippi, Missouri, New Jersey, North Carolina, South Carolina, Tennessee, Texas, Wyoming)
Total: 313 collections including 316 occurrences