Cephalopoda - Ammonitida - Stephanoceratidae
Alternative spelling: Skirroceras
Parent taxon: Stephanoceras according to Géczy 1967
See also Arkell et al. 1957 and Sepkoski 2002
Sister taxa: Stephanoceras (Perisphinctes), Stephanoceras arabicum, Stephanoceras arenosum, Stephanoceras boulderense, Stephanoceras chariense, Stephanoceras chrysoolithicum, Stephanoceras diadematum, Stephanoceras dimerum, Stephanoceras elephantinum, Stephanoceras eucyclum, Stephanoceras grantanum, Stephanoceras humphriesianus, Stephanoceras magnumbilicatum, Stephanoceras mixtecorum, Stephanoceras opis, Stephanoceras semilaeve, Stephanoceras skidegatense, Stephanoceras subcompressum, Stephanoceras subtrapezinum, Stephanoceras tumidum
Subtaxa: none
Distribution:
• Jurassic of Canada (1: British Columbia collection), Germany (1), Spain (1), Tunisia (1), United States (1: Oregon)
Total: 5 collections including 6 occurrences