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Dichotomosphinctes
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Perisphinctinae
Formal Genus Name and Reference:
Dichotomosphinctes BUCKMAN, 1926 [Subgen. of Perisphinctes.]
Type Species:
Perisphinctes antecedens SALFELD, 1914
Images
(Click to enlarge in a new window)
Fig. 408,4. * P. (D.) antecedens Salfeld, Ger., 4a,b, * (6*)
Synonyms
Otosphinctes
Geographic Distribution
Eu.-N.Afr.Abys. - Kenya - Tangan. - Madag. - Attock - Cutch-Indon.-Mex.-Cuba-Chile
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(L.Oxf.)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
U.Jur.(U.Oxf.)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
100
Ending Date:
154.78
Description
Typically medium-sized to small, evolute, whorl rounded or quadrate to depressed, finely ribbed to end, constricted, with lappets. [Subgen. of Perisphinctes.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Perisphinctinae
Formal Genus Name and Reference:
Dichotomosphinctes BUCKMAN, 1926 [Subgen. of Perisphinctes.]
Type Species:
Perisphinctes antecedens SALFELD, 1914
Images
(Click to enlarge in a new window)
Fig. 408,4. * P. (D.) antecedens Salfeld, Ger., 4a,b, * (6*)
Synonyms
Otosphinctes
Geographic Distribution
Eu.-N.Afr.Abys. - Kenya - Tangan. - Madag. - Attock - Cutch-Indon.-Mex.-Cuba-Chile
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(L.Oxf.)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
U.Jur.(U.Oxf.)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
100
Ending Date:
154.78
Description
Typically medium-sized to small, evolute, whorl rounded or quadrate to depressed, finely ribbed to end, constricted, with lappets. [Subgen. of Perisphinctes.]