Order Actiniaria (sea anemone)
Alternative spelling: Actinaria
Parent taxon: Hexacorallia according to C. S. McFadden et al. 2021
See also Bambach et al. 2007 and Sepkoski 2002
Sister taxa: Actiniidae, Antipatharia, Rugosa, Scleractinia
Subtaxa: Anenthemonae Mackenzia
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Cretaceous of United States (1: Wyoming collection)
• Carboniferous of United States (3: Illinois, Missouri)
• Delamaran of Canada (2: British Columbia)
Total: 6 collections including 7 occurrences