†subfamily Arcuatothyridinae Katz 1974 (lamp shell)
Rhynchonellata - Terebratulida - Cnismatocentridae
Parent taxon: Cnismatocentridae according to A. Williams et al. 2006
Sister taxa: Cnismatocentridae parvum, Cnismatocentridae sakhalinensis, Cnismatocentrum
Subtaxa: Arcuatothyris Nucleatina
Type: Arcuatothyris
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Cretaceous of Czechia (2 collections), France (7), Portugal (1), Switzerland (7), Tajikistan (2), Turkmenistan (1), the United Kingdom (2)
Total: 22 collections each including a single occurrence