Gastropoda - Cerithimorpha - Orthonemidae
Alternative combinations: Goniasma geminocarinata, Murchisonia geminocarinata, Stegocoelia (Donaldospira) geminocarinata
Full reference: H. Chronic. 1952. Molluscan fauna from the Permian Kaibab Formation, Walnut Canyon, Arizona. Geological Society America Bulletin 63(2):95-166
Belongs to Murchisonia (Donaldospira) according to P. J. Wagner 2023
See also Batten 1964, Chronic 1952, Kues and Batten 2001, Kulas and Batten 1997, Quiroz-Barroso et al. 2021, Yancey 1969 and Yochelson and Saunders 1967
Sister taxa: Donaldospira archiaciana, Donaldospira carinata, Donaldospira malaysia, Donaldospira nodosa, Donaldospira pertusa, Donaldospira taosensis, Donaldospira verneuiliana, Murchisonia (Donaldospira) dispar, Murchisonia (Donaldospira) dussaulti, Murchisonia (Donaldospira) pyramidata
Type specimen: Mus N. Ariz G2.353, a shell. Its type locality is Rimmy Jim Tank, Kaibab Formation, Coconino County, which is in a Roadian marine limestone in the Kaibab Formation of Arizona.
Ecology: epifaunal
Average measurements (in mm): shell diameter 6.03
Distribution:
• Permian of Mexico (1 collection), United States (11: Arizona, Nevada, Wyoming)
Total: 12 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.