Bivalvia - Ostreida - Gryphaeidae
Parent taxon: Exogyrinae according to S. Casadio 1998
See also Bouchet et al. 2010
Sister taxa: Amphidonteini, Ceratostreon, Costagyra, Exogyra, Exogyrini, Fluctogyra, Ilymatogyra, Nanogyra, Nutogyra, Planospirites, Rhynchostreon, Vultogryphaea
Subtaxa: Amphidonte
Ecology: stationary epifaunal suspension feeder
Distribution:
• Cretaceous of Afghanistan (2 collections), Algeria (3), Argentina (20), Bulgaria (1), the Czech Republic (4), Egypt (6), France (3), Germany (7), India (1), Japan (11), Libya (2), Madagascar (1), Mexico (2), the Netherlands (1), New Zealand (10), Oman (3), Pakistan (1), the Russian Federation (2), Serbia and Montenegro (1), Spain (1), Tunisia (2), the United Kingdom (4), United States (7: California, Minnesota), Uzbekistan (1), Yemen (4)
• Jurassic of France (1)
Total: 101 collections including 107 occurrences