Gastropoda - Epitonioidea - Epitoniidae
Alternative spellings: Acrilla (Undiscala), Undiscala
Parent taxon: Amaea according to M. M. Glibert 1962
See also Durham 1937, Durham 1944, Eames 1952 and Sepkoski 2002
Sister taxa: Amaea (Acrilloscala), Amaea (Amaea), Amaea (Discoscala), Amaea cancellata, Amaea cerva, Amaea pentzia, Amaea trifolia
Subtaxa: Acrilla (Undiscala) lolakensis Acrilla (Undiscala) olympicensis Acrilla (Undiscala) soriensis Acrilla (Undiscala) washingtonensis
Ecology: slow-moving low-level epifaunal carnivore
Distribution:
• Oligocene of United States (6: Washington collections)
• Eocene to Oligocene of United States (1: Washington)
• Eocene of Pakistan (1), United States (1: Washington)
• Paleocene of United States (2: California)
• Cretaceous of Israel (12)
Total: 23 collections each including a single occurrence