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Cravenoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Neoglyphioceratoidea
Family:
Cravenoceratidae
Subfamily:
Cravenoceratinae
Formal Genus Name and Reference:
Cravenoceras BISAT, 1928, p. 132
Type Species:
Homoceras malhamense BISAT, 1924, p. 106, OD
Images
(Click to enlarge in a new window)
Fig. 39, 1a-d. *C. malhamense (Bisat), holotype, Bordley Shales, Moore Close Gill, Malham, Yorkshire, England, lower Serpukhovian, a, side view, X 3, b, side view of young specimen, X 5, c, suture, diameter at 13 mm , X 5.6, d, outline of holotype, X 5.6 (Bisat, 1924).
Synonyms
Emstites
Geographic Distribution
Great Britain, Ireland, Belgium, ?Germany, Spain, Portugal, Algeria, Czech Republic, Poland, Serbia, Russia (Moscow basin, Novaia Zemlia, South Urals), Ukraine, Kazakhstan (Karaganda, South Urals), Uzbekistan, Tajikistan (Darvaz), China (Xizang, Ningxia, Gansu), Australia (New South Wales), USA (California, Nevada, Oklahoma)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (Serpukhovian Chesterian)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
65.1
Beginning Date:
336.06
Ending Stage in Treatise Usage:
Mississippian (Serpukhovian Chesterian)
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Conch form thickly discoidal to globose, widely to moderately umbilicate, in young stages extremely evolute, Sculpture consisting of transverse lamellae, which are more or less straight on flanks, but forming a shallow ventral sinus, Spiral ornament may be present, Constrictions weak or absent, Ventral lobe narrow, with relatively low median saddle, Many species
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Neoglyphioceratoidea
Family:
Cravenoceratidae
Subfamily:
Cravenoceratinae
Formal Genus Name and Reference:
Cravenoceras BISAT, 1928, p. 132
Type Species:
Homoceras malhamense BISAT, 1924, p. 106, OD
Images
(Click to enlarge in a new window)
Fig. 39, 1a-d. *C. malhamense (Bisat), holotype, Bordley Shales, Moore Close Gill, Malham, Yorkshire, England, lower Serpukhovian, a, side view, X 3, b, side view of young specimen, X 5, c, suture, diameter at 13 mm , X 5.6, d, outline of holotype, X 5.6 (Bisat, 1924).
Synonyms
Emstites
Geographic Distribution
Great Britain, Ireland, Belgium, ?Germany, Spain, Portugal, Algeria, Czech Republic, Poland, Serbia, Russia (Moscow basin, Novaia Zemlia, South Urals), Ukraine, Kazakhstan (Karaganda, South Urals), Uzbekistan, Tajikistan (Darvaz), China (Xizang, Ningxia, Gansu), Australia (New South Wales), USA (California, Nevada, Oklahoma)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (Serpukhovian Chesterian)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
65.1
Beginning Date:
336.06
Ending Stage in Treatise Usage:
Mississippian (Serpukhovian Chesterian)
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Conch form thickly discoidal to globose, widely to moderately umbilicate, in young stages extremely evolute, Sculpture consisting of transverse lamellae, which are more or less straight on flanks, but forming a shallow ventral sinus, Spiral ornament may be present, Constrictions weak or absent, Ventral lobe narrow, with relatively low median saddle, Many species