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