Gastropoda - Epitonioidea - Epitoniidae
Alternative spellings: Pliciscala (Rugatiscala), Rugatiscala, Turriscala (Rugatiscala)
Parent taxon: Opalia according to A. G. Beu 2011
See also Addicott 1970, Durham 1937, Garvie 1996, Glibert 1962, Jeffery and Tracey 1997, Pacaud and Le Renard 1995 and Sepkoski 2002
Sister taxa: Opalia (Contemniscala), Opalia (Crassiscala), Opalia (Dentiscala), Opalia (Granuliscala), Opalia (Nodiscala), Opalia (Opalia), Opalia (Pliciscala), 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: Opalia (Rugatiscala) cowlitzensis Opalia (Rugatiscala) williamsoni Pliciscala (Rugatiscala) levesquei
Ecology: slow-moving low-level epifaunal carnivore
Distribution:
• Miocene of United States (4: California, Oregon collections)
• Eocene of United States (7: Texas)
• Paleocene of United States (1: Texas)
Total: 12 collections including 13 occurrences