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Neocosmoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Neocomitidae
Formal Genus Name and Reference:
Neocosmoceras BLANCHET, 1922, p. 158
Type Species:
Hoplites sayni Simionescu, 1899, p. 6, SD ROMAN, 1938, p.
Images
(Click to enlarge in a new window)
Fig. 37, 5a, b. *N. sayni (Simionescu), France, lectotype, X0.5 (Mazenot, 1939).
Synonyms
Euthymiceras
Geographic Distribution
southern Europe, northern Africa, Madagascar, Ukraine (Crimea), Pakistan, Himalayas, California, Peru, Argentina
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Berriasian)
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Lower Cretaceous (Berriasian)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
Whorl section polygonal; from early stage very coarse, distant, trituberculate ribs branching obscurely at lateral tubercle; umbilical tubercles bullate, tending to weaken with growth; large ventrolateral tubercles bordering smooth, concave venter, in some produced into large, recurved spines on body chamber. [Euthymiceras, distinguished only by bullate rather than clavate ventrolateral tubercles, should be included. Distinction from Protacanthodiscus is uncertain.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Neocomitidae
Formal Genus Name and Reference:
Neocosmoceras BLANCHET, 1922, p. 158
Type Species:
Hoplites sayni Simionescu, 1899, p. 6, SD ROMAN, 1938, p.
Images
(Click to enlarge in a new window)
Fig. 37, 5a, b. *N. sayni (Simionescu), France, lectotype, X0.5 (Mazenot, 1939).
Synonyms
Euthymiceras
Geographic Distribution
southern Europe, northern Africa, Madagascar, Ukraine (Crimea), Pakistan, Himalayas, California, Peru, Argentina
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Berriasian)
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Lower Cretaceous (Berriasian)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
Whorl section polygonal; from early stage very coarse, distant, trituberculate ribs branching obscurely at lateral tubercle; umbilical tubercles bullate, tending to weaken with growth; large ventrolateral tubercles bordering smooth, concave venter, in some produced into large, recurved spines on body chamber. [Euthymiceras, distinguished only by bullate rather than clavate ventrolateral tubercles, should be included. Distinction from Protacanthodiscus is uncertain.]