Cephalopoda - Ammonitida - Polyptychitidae

Full reference: P. Alsen. 2006. The Early Cretaceous (Late Ryazanian-Early Hauterivian) ammonite fauna of North-East Greenland: taxonomy, biostratigraphy, and biogeography. Fossils and Strata 53:1-229

Belongs to Polyptychites (Euryptychites) according to P. Alsen 2006

Sister taxa: Polyptychites (Euryptychites) copiocostatus, Polyptychites (Euryptychites) diplotomus, Polyptychites (Euryptychites) gravesiformis, Polyptychites (Euryptychites) laevis, Polyptychites (Euryptychites) latissimus, Polyptychites (Euryptychites) pateraeformis, Polyptychites (Euryptychites) roemeri, Polyptychites (Euryptychites) rubricosus, Polyptychites (Euryptychites) subcoronatus, Polyptychites (Euryptychites) traillensis

Type specimen: MGUH 28187, a shell

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell length 58.0