Gastropoda - Prosobranchia - Pseudozygopleuridae
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
Belongs to Pseudozygopleura (Pseudozygopleura) according to H. A. Kulas and R. L. Batten 1997
Sister taxa: Pseudozygopleura (Pseudozygopleura) conica, Pseudozygopleura (Pseudozygopleura) convexus, Pseudozygopleura (Pseudozygopleura) granda, Pseudozygopleura (Pseudozygopleura) leveneae, Pseudozygopleura (Pseudozygopleura) lirata, Pseudozygopleura (Pseudozygopleura) obliqua, Pseudozygopleura (Pseudozygopleura) obtusicacuminis, Pseudozygopleura (Pseudozygopleura) pagoda, Pseudozygopleura (Pseudozygopleura) peoriense, Pseudozygopleura (Pseudozygopleura) pinquicula, Pseudozygopleura (Pseudozygopleura) pleurozyga, Pseudozygopleura (Pseudozygopleura) praeacuta, Pseudozygopleura (Pseudozygopleura) recticostata, Pseudozygopleura (Pseudozygopleura) rothi, Pseudozygopleura (Pseudozygopleura) werneri
Type specimen: YPM 12972, a shell. Its type locality is SL-1. Headwaters of Feefee Creek, north of Olive St. & west of Lindberg Blvd., 1.5 km northwest of Stratmann (Olivette), which is in a Moscovian marine shale in the Appanoose Formation of Missouri.
Ecology: epifaunal
Average measurements (in mm): shell 5.60 x 2.40