Cephalopoda - Orthocerida - Proteoceratidae

Full reference: B. Kröger, J. O. R. Ebbestad, and A. E. S. Högström Frisk. 2011. Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationships. Fossil Record 14(1):35-53

Belongs to Isorthoceras according to B. Kröger et al. 2011

Sister taxa: Isorthoceras albersi, Isorthoceras bisignatum, Isorthoceras junceum, Isorthoceras rogersensis, Isorthoceras subcostatum

Ecology: nektonic carnivore