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Dimorphoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Goniatitina
Superfamily:
Dimorphoceratoidea
Family:
Dimorphoceratidae
Subfamily:
Dimorphoceratinae
Formal Genus Name and Reference:
Dimorphoceras HYATT, 1884 in 1883-1884, p. 331
Type Species:
Goniatites Gilbertsoni Phillips, 1836, p. 236, SD Foord & CRICK, 1897, p. 219
Images
(Click to enlarge in a new window)
Fig. 24, 3a-b. *D. gilbertsoni (PhilLIPS), a, holotype, Yorkshire, England, ?upper Visean, Gilbertson Collection BMNH, X 2 (Foord & Crick, 1897), b, suture, Bowland Shales, upper Visean, X 2.8 (Moore, 1930).
Synonyms
Geographic Distribution
Germany, USA (Alaska), ?Belgium, Great Britain, Ukraine, Algeria, Morocco
Age Range
Beginning Stage in Treatise Usage:
Mississippian (?upper Tournaisian, Visean)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Mississippian (?upper Tournaisian, Visean)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Ventral lobe with bidentate branches
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Goniatitina
Superfamily:
Dimorphoceratoidea
Family:
Dimorphoceratidae
Subfamily:
Dimorphoceratinae
Formal Genus Name and Reference:
Dimorphoceras HYATT, 1884 in 1883-1884, p. 331
Type Species:
Goniatites Gilbertsoni Phillips, 1836, p. 236, SD Foord & CRICK, 1897, p. 219
Images
(Click to enlarge in a new window)
Fig. 24, 3a-b. *D. gilbertsoni (PhilLIPS), a, holotype, Yorkshire, England, ?upper Visean, Gilbertson Collection BMNH, X 2 (Foord & Crick, 1897), b, suture, Bowland Shales, upper Visean, X 2.8 (Moore, 1930).
Synonyms
Geographic Distribution
Germany, USA (Alaska), ?Belgium, Great Britain, Ukraine, Algeria, Morocco
Age Range
Beginning Stage in Treatise Usage:
Mississippian (?upper Tournaisian, Visean)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Mississippian (?upper Tournaisian, Visean)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Ventral lobe with bidentate branches