Parent taxon: Requieniidina according to P. W. Skelton 2013
See also Bouchet et al. 2010, Carter et al. 2011 and Nevesskaja 2009
Sister taxa: none
Subtaxa: Epidiceratidae Requieniidae
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Cretaceous of Afghanistan (1 collection), Albania (1), Algeria (1), Angola (1), Bulgaria (1), China (1), Croatia (1), Egypt (7), France (8), Georgia (1), Germany (2), Hungary (5), Iran (3), Iraq (1), Italy (24), Japan (1), Jordan (3), Mexico (10), Morocco (1), North Pacific (1), Oman (1), Portugal (9), Romania (1), Saudi Arabia (2), Serbia (2), Slovenia (29), Somalia (2), Spain (28), Switzerland (1), Turkmenistan (1), Türkiye (2), Ukraine (1), the United Kingdom (3), United States (12: Arizona, Texas), Venezuela (1), Yemen (1)
• Jurassic to Cretaceous of Spain (1)
• Jurassic of France (4), Germany (2), Hungary (1), Poland (4), Saudi Arabia (1), Tunisia (1)
Total: 184 collections including 250 occurrences