Gastropoda - Zygopleuroidea - Pseudozygopleuridae
Alternative combinations: Gamizyga (Plocezyga) percostata, Hemizyga (Plocezyga) percostata
Full reference: J. B. Knight. 1930. The gastropods of the St. Louis, Missouri, Pennsylvanian outlier: the Pseudozygopleurinae. Journal of Paleontology Memoir 4(1):1-88
Belongs to Plocezyga according to P. J. Wagner 2023
See also Hoare 1961, Hoare and Sturgeon 1980, Knight 1930, Kues and Batten 2001 and Yochelson and Saunders 1967
Sister taxa: Hemizyga (Plocezyga) abolescens, Hemizyga (Plocezyga) angularis, Hemizyga (Plocezyga) convertacostata, Hemizyga (Plocezyga) serocorona, Hemizyga (Plocezyga) tenuis, Plocezyga (Plocezyga), Plocezyga acuminata, Plocezyga boikoi, Plocezyga conica, Plocezyga convexa, Plocezyga cordiformis, Plocezyga corona, Plocezyga costata, Plocezyga delicata, Plocezyga excellens, Plocezyga gruendeli, Plocezyga indica, Plocezyga intermedia, Plocezyga lineata, Plocezyga lirata, Plocezyga markae, Plocezyga minuta, Plocezyga obscura, Plocezyga ornata, Plocezyga ornatissima, Plocezyga perminuta, Plocezyga regularia, Plocezyga salomonense, Plocezyga subnodosa, Plocezyga subquadrata, Plocezyga tenuilirata, Plocezyga turbinata, Plocezyga venusta
Subtaxa: Gamizyga (Plocezyga) percostata subrotunda
Type specimen: YPM 12998, 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 offshore shale in the Appanoose Formation of Missouri.
Distribution:
• Carboniferous of United States (6: Missouri, New Mexico, Ohio collections)
Total: 6 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.