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Kranaosphinctes
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Kranaosphinctes BUCKMAN, 1921 [Subgen. of Perisphinctes.]
Type Species:
K. kranaus
Images
(Click to enlarge in a new window)
Fig. 409,1. *P. (K.) kranaus (Buck.), Eng., x0.15 (6*)
Synonyms
Cymatosphinctes, Pachyplanulites, Germanosphinctes
Geographic Distribution
Eu.-N.Afr.-Somali-Ken-ya-Tangan. - C. Russia-Attock-Cutch-Japan-Indon.-N.Guinea
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(U.Oxf.)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
50
Beginning Date:
158.16
Ending Stage in Treatise Usage:
U.Jur.(U.Oxf.)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
100
Ending Date:
154.78
Description
Large to gigantic, whorls round to depressed, ribbing gradually changes from normal to modified and venter becomes smooth before end of septation, peristome simple, deep constrictions. [Subgen. of Perisphinctes.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Kranaosphinctes BUCKMAN, 1921 [Subgen. of Perisphinctes.]
Type Species:
K. kranaus
Images
(Click to enlarge in a new window)
Fig. 409,1. *P. (K.) kranaus (Buck.), Eng., x0.15 (6*)
Synonyms
Cymatosphinctes, Pachyplanulites, Germanosphinctes
Geographic Distribution
Eu.-N.Afr.-Somali-Ken-ya-Tangan. - C. Russia-Attock-Cutch-Japan-Indon.-N.Guinea
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(U.Oxf.)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
50
Beginning Date:
158.16
Ending Stage in Treatise Usage:
U.Jur.(U.Oxf.)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
100
Ending Date:
154.78
Description
Large to gigantic, whorls round to depressed, ribbing gradually changes from normal to modified and venter becomes smooth before end of septation, peristome simple, deep constrictions. [Subgen. of Perisphinctes.]