Cephalopoda - Ammonitida - Polyptychitidae
Alternative spelling: Prodichotomites
Synonym: Ringnesiceras Kemper and Jeletzky 1979
Parent taxon: Dichotomites according to P. Alsen 2006
See also Bogomolov 1989, Jeletzky and Kemper 1988, Kemper and Jeletzky 1979 and Lukeneder 2004
Sister taxa: Dichotomites (Dichotomites), Dichotomites bidichotomus, Dichotomites multicostatus, Polyptychites (Dichotomites) bidichotomoides
Subtaxa: Dichotomites (Prodichotomites) amundensis Dichotomites (Prodichotomites) crassus Dichotomites (Prodichotomites) ellefensis Dichotomites (Prodichotomites) flexicosta Dichotomites (Prodichotomites) mackneyi Dichotomites (Prodichotomites) polytomus Prodichotomites complanatus Prodichotomites fissuratus Prodichotomites glaber Prodichotomites grotriani Prodichotomites ivanovi Prodichotomites perovalis Prodichotomites pfaffi Prodichotomites robustus Prodichotomites undulatus Ringnesiceras (Ringnesiceras)
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Austria (1 collection), Canada (2: Northwest Territories), Greenland (2), Poland (13), the Russian Federation (1), Svalbard and Jan Mayen (2)
Total: 21 collections including 23 occurrences