†family Pseudozygopleuridae Knight 1930 (snail)
Alternative spelling: Pseudozygopleurinae
Synonyms: Cyclozygidae Likharev 1970, Eoptychiidae Golikov and Starobogatov 1987, Stephanozygidae Golikov and Starobogatov 1987
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: Zygopleuroidea according to B. S. Kues 2002
Sister taxon: Plicacerithium
Subtaxa: Cyclozyga, Eoptychia, Gamizyga, Helminthozyga, Hemizyga, Microptychis, Plocezyga, Pseudoplocezyga, Pseudozygopleura, Stephanozyga
Ecology: epifaunal