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Nipponites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Turrilitaceae
Family:
Nostoceratidae
Formal Genus Name and Reference:
Nipponites YABE, 1904, p. 20
Type Species:
N. mirabilis, OD
Images
(Click to enlarge in a new window)
Fig. 192, 3a, b. *N. mirabilis, Coniacian, Japan, a, X 0.75, b, diagram of coiling, X 0.5 (Yabe, 1904)."
Synonyms
Geographic Distribution
Madagascar, Japan, Kamchatka, Sakhalin, Oregon
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Upper Turonian)
Beginning International Stage:
Turonian
Fraction Up In Beginning Stage:
75
Beginning Date:
90.52
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Santonian)
Ending International Stage:
Santonian
Fraction Up In Ending Stage:
20
Ending Date:
85.29
Description
Coiled initially in loose helix, then in succession of U's in 3 dimensions, forming a tangle, with or without final retroversal hook, ribs single and regular, constrictions present
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Turrilitaceae
Family:
Nostoceratidae
Formal Genus Name and Reference:
Nipponites YABE, 1904, p. 20
Type Species:
N. mirabilis, OD
Images
(Click to enlarge in a new window)
Fig. 192, 3a, b. *N. mirabilis, Coniacian, Japan, a, X 0.75, b, diagram of coiling, X 0.5 (Yabe, 1904)."
Synonyms
Geographic Distribution
Madagascar, Japan, Kamchatka, Sakhalin, Oregon
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Upper Turonian)
Beginning International Stage:
Turonian
Fraction Up In Beginning Stage:
75
Beginning Date:
90.52
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Santonian)
Ending International Stage:
Santonian
Fraction Up In Ending Stage:
20
Ending Date:
85.29
Description
Coiled initially in loose helix, then in succession of U's in 3 dimensions, forming a tangle, with or without final retroversal hook, ribs single and regular, constrictions present