Cephalopoda - Ammonitida - Polyptychitidae
Alternative spelling: Amundiptychites
Synonym: Hollwediceras Jeletzky and Kemper 1988
Full reference: E. Kemper and J. A. Jeletzky. 1979. New stratigraphically and phylogenetically important Olcostephanid (Ammonitida) taxa from the uppermost Lower and Upper Valanginian of Sverdrup Basin. Geological Society of Canada Paper 79(19):1-25
Parent taxon: Polyptychites according to P. Alsen 2006
See also Bogomolov 1989, Jeletzky and Kemper 1988 and Kemper and Jeletzky 1979
Sister taxa: Polyptychites (Astieriptychites), Polyptychites (Euryptychites), Polyptychites (Paleodichotomites), Polyptychites (Polyptychites), Polyptychites (Primitiviptychites), Polyptychites (Siberiptychites), Polyptychites balkwilli, Polyptychites brancoi, Polyptychites canadensis, Polyptychites clarkei, Polyptychites hapkei, Polyptychites hesperius, Polyptychites hoeli, Polyptychites lamplughi, Polyptychites multicostatus, Polyptychites multiplicatus, Polyptychites oerlinghusanus, Polyptychites orbitatus, Polyptychites pavlowi, Polyptychites saxonicus, Polyptychites sublatissimus, Polyptychites tethyale, Polyptychites traski, Polyptychites trichotomus, Polyptychites villersensis
Subtaxa: Amundiptychites thorsteinssoni Polyptychites (Amundiptychites) fasciatus Polyptychites (Amundiptychites) sphaericus Polyptychites (Amundiptychites) sverdrupi
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Canada (4: Northwest Territories collections), Greenland (1), Poland (1)
Total: 6 collections including 8 occurrences