Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Stephanoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Haplocerataceae
Family:
Stephanoceratidae
Formal Genus Name and Reference:
Stephanoceras WAAGEN, 1869
Type Species:
Am. humphriesianus J.deC.SOWERBY, 1825; SD BUCKMAN, 1898 (ICZN Opinion 324)
Images
(Click to enlarge in a new window)
Fig. 342,1. *S. (S.) humphriesianum (Sow.), Eng., 1 a, b, holotype, x0.3 (595*)
Synonyms
Stepheoceras, Stephoceras, Grahamites, Kallistephanus, Rhytostephanus, Mollistephanus, Kreterostephanus, Brodiaeia
Geographic Distribution
Eu.-N.Afr.-Sinai-C.Arabia-Kenya-Cauc.-Azerbaijan-Persia-N.Guinea-Indon.-S.Alaska-Can.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
M.Baj.
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
33
Beginning Date:
170
Ending Stage in Treatise Usage:
M.Baj.
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
66
Ending Date:
169.1
Description
Moderately stout tuberculate planulates, ribbing sharp, entire on the venter, aperture collared and lipped
References
Waagen, Wilhelm, 1869, Die Formenreihe des Ammonites subradiatus: Geogn.-Paläont. Beitr., Band 2, Heft 2, p. 181-256, pl. 16-20.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Haplocerataceae
Family:
Stephanoceratidae
Formal Genus Name and Reference:
Stephanoceras WAAGEN, 1869
Type Species:
Am. humphriesianus J.deC.SOWERBY, 1825; SD BUCKMAN, 1898 (ICZN Opinion 324)
Images
(Click to enlarge in a new window)
Fig. 342,1. *S. (S.) humphriesianum (Sow.), Eng., 1 a, b, holotype, x0.3 (595*)
Synonyms
Stepheoceras, Stephoceras, Grahamites, Kallistephanus, Rhytostephanus, Mollistephanus, Kreterostephanus, Brodiaeia
Geographic Distribution
Eu.-N.Afr.-Sinai-C.Arabia-Kenya-Cauc.-Azerbaijan-Persia-N.Guinea-Indon.-S.Alaska-Can.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
M.Baj.
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
33
Beginning Date:
170
Ending Stage in Treatise Usage:
M.Baj.
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
66
Ending Date:
169.1
Description
Moderately stout tuberculate planulates, ribbing sharp, entire on the venter, aperture collared and lipped
References
Waagen, Wilhelm, 1869, Die Formenreihe des Ammonites subradiatus: Geogn.-Paläont. Beitr., Band 2, Heft 2, p. 181-256, pl. 16-20.