Cephalopoda - Ammonitida - Pachydiscidae
Alternative combination: Pachydiscus (Pachydiscus) riccardi
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 according to C. P. Consoli and J. D. Stilwell 2005
See also Macellari 1986
Sister taxa: Pachydiscus (Neodesmoceras), Pachydiscus (Pachydiscus), Pachydiscus armenicus, Pachydiscus besairiei, Pachydiscus binodatus, Pachydiscus buckhami, Pachydiscus colligatus, Pachydiscus epiplectus, Pachydiscus excelsus, Pachydiscus flexuosus, Pachydiscus gollevillensis, Pachydiscus hauthali, Pachydiscus launayi, Pachydiscus levyi, Pachydiscus naumanni, Pachydiscus neevesi, Pachydiscus patagonicus, Pachydiscus peramplus, Pachydiscus perfidus, Pachydiscus precolligatus, Pachydiscus stallauensis, Pachydiscus steinmanni, Pachydiscus subcompressus, Pachydiscus subrobustus, Parapachydiscus parahybensis, Parapachydiscus californicus, Parapachydiscus oceanus, Parapachydiscus hermes, Parapachydiscus albuquerquei, Parapachydiscus bruneti, Parapachydiscus athena, Parapachydiscus stanislausensis, Parapachydiscus gettyi, Parapachydiscus sumneri, Parapachydiscus brasiliensis, Pachydiscus (Parapachydiscus) woodringi, Parapachydiscus psyche, Parapachydiscus perseus, Parapachydiscus poseidon, Parapachydiscus hera, Parapachydiscus arionis, Parapachydiscus diabloensis, Parapachydiscus endymion, Parapachydiscus eurydice, Parapachydiscus euzebioi, Parapachydiscus williamsoni, Parapachydiscus reedsi, Parapachydiscus orpheus, Pachydiscus (Parapachydiscus) gardneri, Parapachydiscus cortinaensis, Parapachydiscus abbotti, Parapachydiscus henleyensis
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 121.2
Distribution:
• Cretaceous of Antarctica (24 collections), New Zealand (1)
Total: 25 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.