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Thomelites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Acanthoceratidae
Formal Genus Name and Reference:
Thomelites Wright & Kennedy in Juignet, Kennedy, & WRIGHT, 1973, p. 231
Type Species:
Thomelites Wright & Kennedy in Juignet, Kennedy, & Wright, 1973, p. 231 *Jeanrogericeras sornayi Thomel in Porthault, Thomel, & VILLOUTREYS, 1967, p. 431, OD
Images
(Click to enlarge in a new window)
Fig. 123, 1a, b. *T. sornayi (Thomel), England, X 0.75 (Juignet, Kennedy, & Wright, 1973).
Synonyms
Jeanrogericeras sornayi
Geographic Distribution
England, France, Israel, ?southern India, Texas, South Dakota, Brazil
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Upper Cenomanian)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
75
Beginning Date:
95.55
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Turonian)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
25
Ending Date:
92.77
Description
Evolute, inflated to compressed, with sides parallel as far as inner ventrolateral tubercle, then converging to narrow venter. Ribs weak to strong, branching in twos or threes from umbilical tubercles or intercalated, inner ventrolateral tubercle on inner whorls at least, at which ribs may branch, all ribs with outer ventrolateral clavi, siphonal tubercle on inner whorls at least. Suture with external saddle deeply divided, folioles phylloid or simple and rounded.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Acanthoceratidae
Formal Genus Name and Reference:
Thomelites Wright & Kennedy in Juignet, Kennedy, & WRIGHT, 1973, p. 231
Type Species:
Thomelites Wright & Kennedy in Juignet, Kennedy, & Wright, 1973, p. 231 *Jeanrogericeras sornayi Thomel in Porthault, Thomel, & VILLOUTREYS, 1967, p. 431, OD
Images
(Click to enlarge in a new window)
Fig. 123, 1a, b. *T. sornayi (Thomel), England, X 0.75 (Juignet, Kennedy, & Wright, 1973).
Synonyms
Jeanrogericeras sornayi
Geographic Distribution
England, France, Israel, ?southern India, Texas, South Dakota, Brazil
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Upper Cenomanian)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
75
Beginning Date:
95.55
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Turonian)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
25
Ending Date:
92.77
Description
Evolute, inflated to compressed, with sides parallel as far as inner ventrolateral tubercle, then converging to narrow venter. Ribs weak to strong, branching in twos or threes from umbilical tubercles or intercalated, inner ventrolateral tubercle on inner whorls at least, at which ribs may branch, all ribs with outer ventrolateral clavi, siphonal tubercle on inner whorls at least. Suture with external saddle deeply divided, folioles phylloid or simple and rounded.