Cephalopoda - Ammonitida - Polyptychitidae
Alternative spelling: Polyptychites (Dichotomites)
Synonym: Ringnesiceras (Elleficeras) Kemper and Jeletzky 1979
Parent taxon: Polyptychitinae according to P. Alsen 2006
See also Bogomolov 1989, Jeletzky and Kemper 1988, Kemper and Jeletzky 1979 and Sepkoski 2002
Sister taxa: Hertleinites, Polyptychites, Wellsia
Subtaxa: Dichotomites (Dichotomites) Dichotomites (Prodichotomites) Dichotomites multicostatus Polyptychites (Dichotomites) bidichotomoides
Type: Ammonites bidichotomus
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Austria (1 collection), Canada (6: British Columbia, Northwest Territories), Greenland (5), Mexico (1), Poland (13), the Russian Federation (17), Svalbard and Jan Mayen (2), United States (1: Oregon)
Total: 46 collections including 72 occurrences
Specimen images are retrieved through the ePANDDA API.
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