Pachydiscus (Pachydiscus) ultimus Macellari 1986 (ammonite)

Cephalopoda - Ammonitida - Pachydiscidae

Full reference: C. E. Macellari. 1986. Late Campanian-Maastrichtian ammonite fauna from Seymour Island (Antarctic Peninsula). The Paleontological Society Memoir 18:1-59

Belongs to Pachydiscus (Pachydiscus) according to C. E. Macellari 1986

Sister taxa: Pachydiscus (Pachydiscus) arkansanus, Pachydiscus (Pachydiscus) armenicus, Pachydiscus (Pachydiscus) australis, Pachydiscus (Pachydiscus) awajiensis, Pachydiscus (Pachydiscus) cayeuxi, Pachydiscus (Pachydiscus) colligatus, Pachydiscus (Pachydiscus) complanatus, Pachydiscus (Pachydiscus) dossantosi, Pachydiscus (Pachydiscus) duelmensis, Pachydiscus (Pachydiscus) egertoni, Pachydiscus (Pachydiscus) gutierrezi, Pachydiscus (Pachydiscus) haldemsis, Pachydiscus (Pachydiscus) hazzardi, Pachydiscus (Pachydiscus) jacquoti, Pachydiscus (Pachydiscus) jeani, Pachydiscus (Pachydiscus) kamishakensis, Pachydiscus (Pachydiscus) launayi, Pachydiscus (Pachydiscus) noetlingi, Pachydiscus (Pachydiscus) oldhami, Pachydiscus (Pachydiscus) ootacodensis, Pachydiscus (Pachydiscus) paulsoni, Pachydiscus (Pachydiscus) rogeri, Pachydiscus (Pachydiscus) subcompressus, Pachydiscus (Pachydiscus) subrobustus, Pachydiscus (Pachydiscus) yama

Type specimen: OSU 38294, a shell

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 131.2

Distribution:

• Cretaceous of Antarctica (15 collections)

Total: 15 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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