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

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.