Helcionelloida - Helcionellida - Stenothecidae
Alternative combination: Mellopegma georginense
Full reference: B. Runnegar and P.A. Jell. 1976. Australian Middle Cambrian molluscs and their bearing on early molluscan evolution. Alcheringa 1(1/2):109-138
Belongs to Mellopegma according to P. J. Wagner 2023
See also Landing et al. 2002, Runnegar and Jell 1976, Vendrasco et al. 2011 and Vendrasco et al. 2010
Sister taxa: Mellopegma indecora, Mellopegma schizocheras, Mellopegma uslonica
Type specimen: Its type locality is QML1286 km SSW of Thorntonia Homestead, which is in a Floran carbonate limestone in the Gowers Formation of Australia.
Distribution:
• Cambrian of Australia (5 collections), Canada (2: British Columbia, Quebec), United States (3: New York, Utah)
Total: 10 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.