Cephalopoda - Ammonitida - Pachydiscidae
Alternative combinations: Ammonites ootacodensis, Parapachydiscus ootacodensis
Synonym: Pachydiscus (Pachydiscus) hornbyense Jones 1963
Belongs to Pachydiscus (Pachydiscus) according to C. E. Macellari 1986
See also Anderson 1958, Anderson and Hanna 1935 and Jones 1963
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) egertoni, 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) paulsoni, Pachydiscus (Pachydiscus) rogeri, Pachydiscus (Pachydiscus) ultimus, Pachydiscus (Pachydiscus) yama
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 102.6
Distribution:
• Cretaceous of Antarctica (5 collections), Canada (1: British Columbia), Mexico (1), United States (11: Alaska, California)
Total: 18 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.