Cephalopoda - Ammonitida - Tetragonitidae
Parent taxon: Gaudryceras according to C. W. Wright et al. 1996
See also Cooper 1978, Kennedy 1994, Kennedy 1995, Kennedy et al. 2007 and Matsumoto 1959
Sister taxa: Gaudryceras aenigma, Gaudryceras beantalyense, Gaudryceras crassicostatum, Gaudryceras hobetsense, Gaudryceras izumiense, Gaudryceras kayei, Gaudryceras makarovense, Gaudryceras mite, Gaudryceras numidum, Gaudryceras propemite, Gaudryceras seymouriense, Gaudryceras stefaninii, Gaudryceras striatum, Gaudryceras tenuiliratum, Gaudryceras varagurense, Lytoceras (Gaudryceras) alamedense, Lytoceras (Gaudryceras) delvallense, Lytoceras (Gaudryceras) neptunium, Lytoceras (Gaudryceras) texanum, Vertebrites murdochi, Mesogaudryceras leptonema, Gaudryceras (Neogaudryceras) pictum
Subtaxa: Gaudryceras (Gaudryceras) cassisianum Gaudryceras (Gaudryceras) denmanense Gaudryceras (Gaudryceras) denseplicatum Gaudryceras (Gaudryceras) isovokyense Gaudryceras (Gaudryceras) strictum Gaudryceras (Gaudryceras) varicostatum
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Angola (1 collection), Antarctica (5), France (10), Japan (26), Nigeria (1), the Russian Federation (2), South Africa (5), United States (12: Alaska, California, Washington)
Total: 62 collections including 64 occurrences