Gastropoda - Epitonioidea - Epitoniidae
Parent taxon: Opalia according to B. Wilson 1993
Sister taxa: Opalia (Contemniscala), Opalia (Crassiscala), Opalia (Dentiscala), 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: none
Ecology: slow-moving low-level epifaunal carnivore
Distribution: found only at Peppermint Grove Limestone Mbr, Tamala Limestone - East Freemantle (Quaternary of Australia)