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 albuquerquei, Parapachydiscus reedsi, Parapachydiscus perseus, Parapachydiscus henleyensis, Parapachydiscus cortinaensis, Pachydiscus (Parapachydiscus) woodringi, Pachydiscus (Parapachydiscus) gardneri, Parapachydiscus brasiliensis, Parapachydiscus eurydice, Parapachydiscus abbotti, Parapachydiscus williamsoni, Parapachydiscus californicus, Parapachydiscus gettyi, Parapachydiscus oceanus, Parapachydiscus diabloensis, Parapachydiscus arionis, Parapachydiscus euzebioi, Parapachydiscus bruneti, Parapachydiscus sumneri, Parapachydiscus athena, Parapachydiscus hera, Parapachydiscus poseidon, Parapachydiscus stanislausensis, Parapachydiscus endymion, Parapachydiscus orpheus, Parapachydiscus psyche, Parapachydiscus hermes

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 121.2

Distribution:

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Specimen images are retrieved through the ePANDDA API.