Cephalopoda - Ammonitida - Muniericeratidae
Alternative combinations: Desmoceras ashlandicum, Pachydiscus ashlandicus
Synonym: Pachydiscus oregonensis Anderson 1958
Full reference: F. M. Anderson. 1902. Cretaceous Deposits of the Pacific Coast. Proceedings of the California Academy of Sciences 2(1):1-155
Belongs to Tragodesmoceras according to J. W. Haggart et al. 2005
See also Anderson 1958 and Matsumoto 1959
Sister taxa: Tragodesmoceras averilli, Tragodesmoceras bassi, Tragodesmoceras carlilense, Tragodesmoceras clypealoides, Tragodesmoceras dresdense, Tragodesmoceras socorroense
Type specimens:
- Tragodesmoceras ashlandicum: CAS 446.01, a shell. Its type locality is CAS loc. 446, Ashland, which is in a Turonian marine siliciclastic in Oregon.
- Pachydiscus oregonensis: CAS 445.02, a shell. Its type locality is CAS Loc. 445 - Phoenix, which is in a Turonian coastal siliciclastic in Oregon.
Average measurements (in mm): shell diameter 88.4
Distribution:
• Cretaceous of Canada (6: British Columbia collections), United States (9: California, Oregon)
Total: 15 collections including 17 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.