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Physodoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Physodoceras HYATT, 1900
Type Species:
Am. circumspinosus QUENSTEDT, 1858
Images
(Click to enlarge in a new window)
Fig. 444,5. * P. circumspinosum (Quenst.), Ger.; X1 (359*)
Synonyms
Geographic Distribution
Eu.-Russia-Abys.-Kenya-Madag.-?Cutch-Himalaya-Mex.-Tex.-Cuba.
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(Kimm.)
Beginning International Stage:
Kimmeridgian
Fraction Up In Beginning Stage:
0
Beginning Date:
154.78
Ending Stage in Treatise Usage:
U.Jur.(Kimm.)
Ending International Stage:
Kimmeridgian
Fraction Up In Ending Stage:
100
Ending Date:
149.24
Description
Involute, globular, smooth but for inner row of lateral spines which are on umbilical edge and directed inward over umbilicus
References
Hyatt, Alpheus, 1900, Cephalopoda: in Zittel, K. A., Textbook of Palaeontology, 1st English ed., transl. Eastman, C. R., p. 502-592, fig. 1049-1235.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Physodoceras HYATT, 1900
Type Species:
Am. circumspinosus QUENSTEDT, 1858
Images
(Click to enlarge in a new window)
Fig. 444,5. * P. circumspinosum (Quenst.), Ger.; X1 (359*)
Synonyms
Geographic Distribution
Eu.-Russia-Abys.-Kenya-Madag.-?Cutch-Himalaya-Mex.-Tex.-Cuba.
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(Kimm.)
Beginning International Stage:
Kimmeridgian
Fraction Up In Beginning Stage:
0
Beginning Date:
154.78
Ending Stage in Treatise Usage:
U.Jur.(Kimm.)
Ending International Stage:
Kimmeridgian
Fraction Up In Ending Stage:
100
Ending Date:
149.24
Description
Involute, globular, smooth but for inner row of lateral spines which are on umbilical edge and directed inward over umbilicus
References
Hyatt, Alpheus, 1900, Cephalopoda: in Zittel, K. A., Textbook of Palaeontology, 1st English ed., transl. Eastman, C. R., p. 502-592, fig. 1049-1235.