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
Parent taxon: Proteoceratidae according to B. Kröger et al. 2011
Sister taxa: Archigeisonoceras, Baykonuroceras, Cyrtactinoceras, Ephippiorthoceras, Euorthoceras, Gangshanoceras, Gorbyoceras, Isorthoceras, Liulinoceras, Mesnaquaceras, Metephippiorthoceras, Monomuchites, Orthonybyoceras, Paraproteoceras, Proteoceras, Pseudoliolinoceras, Stereospyroceras, Tofangoceras, Treptoceras, Ulmioceras
Subtaxa: Transorthoceras osmundsbergense
Type: Transorthoceras osmundsbergense
Ecology: nektonic carnivore