Plocezyga percostata Knight 1930

Gastropoda - Prosobranchia - 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(4):1-88

Belongs to Plocezyga according to P. J. Wagner 2017

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 conica, Plocezyga cordiformis, Plocezyga corona, Plocezyga costata, Plocezyga delicata, Plocezyga excellens, Plocezyga indica, Plocezyga intermedia, Plocezyga lineata, Plocezyga lirata, Plocezyga markae, Plocezyga obscura, Plocezyga ornata, Plocezyga ornatissima, Plocezyga perminuta, Plocezyga regularia, Plocezyga subnodosa, Plocezyga subquadrata, Plocezyga tenuilirata, Plocezyga turbinata

Subtaxa: Gamizyga (Plocezyga) percostata subrotunda

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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 marine shale in the Appanoose Formation of Missouri.


• Desmoinesian of United States (3: Missouri, New Mexico collections)

• Carboniferous of United States (3: Missouri, Ohio)

Total: 6 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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