Cephalopoda - Ammonitida - Pachydiscidae
Alternative combinations: Ammonites egertoni, Pachydiscus egertoni
Synonyms: Ammonites ganesa Forbes 1846, Parapachydiscus coalingensis Anderson 1958, Parapachydiscus ganesa Forbes 1846
Full reference: E. Forbes. 1846. Report on the fossil invertebrata from southern India, collected by Mr. Kaye and Mr. Cunliffe. Transactions of the Geological Society of London, Series 2 7:97-174
Belongs to Pachydiscus (Pachydiscus) according to W. J. Kennedy and R. A. Henderson 1992
See also Anderson 1958, Forbes 1846, Matsumoto 1959 and Zaborski 1985
Sister taxa: Pachydiscus (Pachydiscus) arkansanus, Pachydiscus (Pachydiscus) australis, Pachydiscus (Pachydiscus) awajiensis, Pachydiscus (Pachydiscus) cayeuxi, Pachydiscus (Pachydiscus) complanatus, Pachydiscus (Pachydiscus) dossantosi, Pachydiscus (Pachydiscus) duelmensis, Pachydiscus (Pachydiscus) gutierrezi, Pachydiscus (Pachydiscus) haldemsis, Pachydiscus (Pachydiscus) hazzardi, Pachydiscus (Pachydiscus) jacquoti, Pachydiscus (Pachydiscus) jeani, Pachydiscus (Pachydiscus) kamishakensis, Pachydiscus (Pachydiscus) neubergicus, Pachydiscus (Pachydiscus) noetlingi, Pachydiscus (Pachydiscus) oldhami, Pachydiscus (Pachydiscus) ootacodensis, Pachydiscus (Pachydiscus) paulsoni, Pachydiscus (Pachydiscus) rogeri, Pachydiscus (Pachydiscus) ultimus, Pachydiscus (Pachydiscus) yama
Type specimens:
- Pachydiscus (Pachydiscus) egertoni: Its type locality is Pondicherry, which is in a Maastrichtian marine sandstone/claystone in the Valudavur Formation of India
- Ammonites ganesa: Its type locality is Pondicherry, which is in a Maastrichtian marine sandstone/claystone in the Valudavur Formation of India.
- Parapachydiscus coalingensis: CAS 2362.02, a shell. Its type locality is CAS Loc. 2362 - Coalinga [Ragged Valley Shale], which is in a Maastrichtian marine shale in the Ragged Valley Shale Formation of California.
Average measurements (in mm): shell diameter 57.0
Distribution:
• Cretaceous of India (1 collection), Nigeria (1), United States (6: California)
Total: 8 collections including 9 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.