Gastropoda - Euomphalina - Helicotomidae
Alternative combination: Polhemia taneyensis
Full reference: J. S. Cullison. 1944. The stratigraphy of some Lower Ordovician formations of the Ozark uplift. University of Missouri School of Mines and Metallurgy Technical Series Bulletin 15(2):1-112
Belongs to Lophonema according to P. J. Wagner 2023
See also Cullison 1944, Knight et al. 1960, Morris and Cleevely 1981, Rohr et al. 2002 and Wagner 1999
Sister taxa: Lophonema abrupta, Lophonema calphurnia, Lophonema circumlirata, Lophonema costata, Lophonema frydai, Lophonema orientalia, Lophonema peccatonica, Lophonema perstriata, Lophonema tricarinata, Lophonema wuhuensis
Type specimen: Its type locality is M. S. M. 105.4, west side of Mo. State Highway 76A at Rockaway Beach, which is in a Cassinian carbonate limestone/chert in the Theodosia Formation of Missouri.
Distribution:
• Ordovician of Canada (2: Newfoundland and Labrador collections), Greenland (1), United States (18: Missouri)
Total: 21 collections including 32 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.