Gastropoda - Prosobranchia - Pseudozygopleuridae

Full reference: T. Kase. 1988. Early Carboniferous (Viséan) gastropods from the Hikoroichi Formation of the Kitakami Mountains, northeast Japan. Transactions and Proceedings of the Palaeontological Society of Japan 149:361-370

Belongs to Pseudozygopleura (Stephanozyga) according to T. Kase 1988

Sister taxa: Pseudozygopleura (Stephanozyga) lisaspira, Stephanozyga granda, Stephanozyga lisaspira, Stephanozyga magna, Stephanozyga nodosa, Stephanozyga subnodosa, Nodozyga rugifera, Nodozyga longnorensis

Type specimen: Its type locality is Onimarua Quarry, Ofunato City, which is in a Visean carbonate sandstone in the Hikoroichi Formation of Japan

Ecology: epifaunal