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Gaudryceras seymouriense Macellari 1986 (ammonite)

Cephalopoda - Ammonitida - Gaudryceratidae

PaleoDB taxon number: 318627

Alternative combination: Anagaudryceras seymouriense

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 Gaudryceras according to Y. Shigeta et al. 2015

Sister taxa: Gaudryceras (Gaudryceras), Gaudryceras aenigma, Gaudryceras beantalyense, Gaudryceras crassicostatum, Gaudryceras hobetsense, Gaudryceras izumiense, Gaudryceras kayei, Gaudryceras makarovense, Gaudryceras mite, Gaudryceras numidum, Gaudryceras propemite, Gaudryceras stefaninii, Gaudryceras striatum, Gaudryceras tenuiliratum, Gaudryceras varagurense, Lytoceras (Gaudryceras) alamedense, Lytoceras (Gaudryceras) aureum, Lytoceras (Gaudryceras) delvallense, Lytoceras (Gaudryceras) denmanense, Lytoceras (Gaudryceras) texanum, Mesogaudryceras leptonema, Vertebrites murdochi, Gaudryceras (Neogaudryceras) pictum

Type specimen: OSU 38333, a shell

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell 630.0 x 50.0, shell diameter 125.8