Pachydiscus (Pachydiscus) egertoni Forbes 1846

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

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Specimen images are retrieved through the ePANDDA API.


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