Gastropoda - Prosobranchia - Pseudozygopleuridae

Alternative spellings: Palaeostylus (Stephanozyga), Pseudozygopleura (Stephanozyga)

Synonyms: Nodozyga Horný 1955, Palaeozygopleura (Nodozyga) Horný 1955

Full reference: J. B. Knight. 1930. The gastropods of the St. Louis, Missouri, Pennsylvanian outlier: the Pseudozygopleurinae. Journal of Paleontology Memoir 4(4):1-88

Parent taxon: Pseudozygopleuridae according to P. Bouchet et al. 2005

Sister taxa: Cyclozyga, Eoptychia, Gamizyga, Helminthozyga, Hemizyga, Microptychis, Plocezyga, Pseudoplocezyga, Pseudozygopleura

Subtaxa: Nodozyga longnorensis, Nodozyga rugifera, Pseudozygopleura (Stephanozyga) lisaspira, Pseudozygopleura (Stephanozyga) nishimurai, Stephanozyga granda, Stephanozyga lisaspira, Stephanozyga magna, Stephanozyga nodosa, Stephanozyga subnodosa

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Type: Zygopleura nodosa

Ecology: epifaunal