Stephanoceras (Stemmatoceras)
Species
Note coarse ribs along sides, passing abruptly into fine ribs
Stephanoceras (Stemmatoceras) arcicostum Imlay, 1967
Occurrence: 45 feet below type of Sliderock Member of Twin Creek Limestone; Sawtooth Formation
Reference: Imlay, 1967
Stephanoceras (Stemmatoceras) arcicostum
Photograph from Imlay, 1967
Stephanoceras (Stemmatoceras) arcicostum
Photograph from Imlay, 1967
Stephanoceras (Stemmatoceras) n. sp. aff. S. albertense McLearn, 1928
Occurrence: upper Sliderock Member of Twin Creek Limestone
Reference: Imlay, 1967
Stephanoceras (Stemmatoceras) n. sp. aff. S. albertense
Photograph from Imlay, 1967
Stephanoceras (Stemmatoceras) cf. S. palliseri McLearn
Occurrence: Sawtooth Formation
Reference: Imlay, 1967
Stephanoceras (Stemmatoceras) cf. S. palliseri
Photograph from Imlay, 1967
