Cephalopoda - Ammonitida - Tetragonitidae
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 and H. Maeda 2023
See also Macellari 1986, Shigeta and Maeda 2005 and Shigeta et al. 2015
Sister taxa: Gaudryceras (Gaudryceras), Gaudryceras (Mesogaudryceras), Gaudryceras aenigma, Gaudryceras beantalyense, Gaudryceras crassicostatum, Gaudryceras hamanakense, Gaudryceras hobetsense, Gaudryceras izumiense, Gaudryceras kayei, Gaudryceras makarovense, Gaudryceras mamiyai, Gaudryceras mite, Gaudryceras numidum, Gaudryceras propemite, Gaudryceras stefaninii, Gaudryceras striatum, Gaudryceras tenuiliratum, Gaudryceras tombetsense, Gaudryceras varagurense, Lytoceras (Gaudryceras) alamedense, Lytoceras (Gaudryceras) delvallense, Lytoceras (Gaudryceras) neptunium, Lytoceras (Gaudryceras) texanum, Gaudryceras (Neogaudryceras) pictum, Vertebrites murdochi
Type specimen: OSU 38333, a shell
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 87.9
Distribution:
• Cretaceous of Antarctica (12 collections), Chile (4), Japan (2), the Russian Federation (4)
Total: 22 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.