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Properisphinctes
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Properisphinctes SPATH, 1931
Type Species:
Perisphinctes bernensis DELORIOL, 1898
Images
(Click to enlarge in a new window)
Fig. 409,2. *P. bernensis (LORIOL), L.Oxf., Switz.; 2a,b, X1 (265*)
Synonyms
Geographic Distribution
Eu.-Madag.-Syria-Cauc.-Cutch-Japan
Age Range
Beginning Stage in Treatise Usage:
M. Jur.(U.Callov.)
Beginning International Stage:
Callovian
Fraction Up In Beginning Stage:
70
Beginning Date:
162.66
Ending Stage in Treatise Usage:
U.Jur.(L.Oxf.)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
50
Ending Date:
158.16
Description
Small, whorls round or depressed, constricted, ribbing not modified on body chamber. Doubtfully distinct from Alligaticeras.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Properisphinctes SPATH, 1931
Type Species:
Perisphinctes bernensis DELORIOL, 1898
Images
(Click to enlarge in a new window)
Fig. 409,2. *P. bernensis (LORIOL), L.Oxf., Switz.; 2a,b, X1 (265*)
Synonyms
Geographic Distribution
Eu.-Madag.-Syria-Cauc.-Cutch-Japan
Age Range
Beginning Stage in Treatise Usage:
M. Jur.(U.Callov.)
Beginning International Stage:
Callovian
Fraction Up In Beginning Stage:
70
Beginning Date:
162.66
Ending Stage in Treatise Usage:
U.Jur.(L.Oxf.)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
50
Ending Date:
158.16
Description
Small, whorls round or depressed, constricted, ribbing not modified on body chamber. Doubtfully distinct from Alligaticeras.