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

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.