Gastropoda - Epitonioidea - Epitoniidae
Alternative spellings: Dentiscala, Epitonium (Dentiscala)
Parent taxon: Opalia according to J. A. Todd 2001
See also Durham 1937, Grant, IV and Gale 1931, Moore 1976 and Sepkoski 2002
Sister taxa: Opalia (Contemniscala), Opalia (Crassiscala), Opalia (Granuliscala), Opalia (Nodiscala), Opalia (Opalia), Opalia (Pliciscala), Opalia (Rugatiscala), Opalia atra, Opalia borealis, Opalia cavea, Opalia crenatoides, Opalia infrequens, Opalia mathewsonii, Opalia montereyensis, Opalia spongiosa, Opalia varicostata, Scala (Opalia) calvertensis, Scala (Opalia) cyclostoma, Scala (Opalia) prunicola, Scala (Opalia) reticulata, Scala (Opalia) thomasi, Scalaria (Opalia) annulata
Subtaxa: Dentiscala funiculata Epitonium (Dentiscala) insculpta Opalia (Dentiscala) hertleini
Distribution:
• Quaternary of Mexico (1 collection), United States (4: California, Florida)
• Oligocene of United States (3: Oregon)
• Eocene of France (2)
Total: 10 collections each including a single occurrence