Gastropoda - Cerithimorpha - Orthonemidae
Alternative combination: Pseudozygopleura (Pyrgozyga) cylindrata
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 Palaeostylus according to P. J. Wagner 2023
See also Knight 1930
Sister taxa: Palaeostylus (Palaeostylus), Palaeostylus acuminatus, Palaeostylus attenuatus, Palaeostylus bipartitus, Palaeostylus confragosus, Palaeostylus delpeyae, Palaeostylus dongluoensis, Palaeostylus dussaulti, Palaeostylus fusuiensis, Palaeostylus giganticus, Palaeostylus guangxiensis, Palaeostylus irregularis, Palaeostylus lateapicatus, Palaeostylus minutus, Palaeostylus nervosus, Palaeostylus obliquicostatus, Palaeostylus planoverticum, Palaeostylus pseudozyga, Palaeostylus puperoides, Palaeostylus pupoides, Paleostylus krasnovidovoensis, Paleostylus krotovi, Paleostylus kukarkensis, Paleostylus stuckenbergi, Spiromphalus pervius
Type specimen: YPM 12984, a shell. Its type locality is Locality 6. 200 ft. north of Clayton Rd., 1st street west of Kirkwood-Ferguson Trolly tracks, "Davis Place" subdivision, Clayton, which is in a Desmoinesian carbonate limestone in the Pawnee Formation of Missouri.
Distribution:
• Carboniferous of United States (2: Missouri collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.