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Micracanthoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Micracanthoceras SPATH, 1925 [Subgen. of Himalayites.]
Type Species:
Am. microcanthus Oppel in ZITTEL, 1868
Images
(Click to enlarge in a new window)
H. (M.) microcanthus (Oppel), Stramberg, 1a,b, x0.5 (575*)
Synonyms
Geographic Distribution
S.Eu.-Alg.-Tangan.-Madag.-Cutch-Tex.-Mex.-Cuba-Arg.
Age Range
Beginning Stage in Treatise Usage:
Tithon.
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
0
Beginning Date:
149.24
Ending Stage in Treatise Usage:
Tithon.
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Evolute, like Himalayites but whorls mainly rounded, tubercles small and more numerous, tuberculate ribs not flared, and secondaries ending in small ventral tubercles beside smooth band. [Subgen. of Himalayites.]
References
Spath, L. F., 1925, Ammonites and Aptychi [from Somaliland]: Mon. Hunterian Mus. Univ. Glasgow, v. 1, p. 111-164, pl. 15-16.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Formal Genus Name and Reference:
Micracanthoceras SPATH, 1925 [Subgen. of Himalayites.]
Type Species:
Am. microcanthus Oppel in ZITTEL, 1868
Images
(Click to enlarge in a new window)
H. (M.) microcanthus (Oppel), Stramberg, 1a,b, x0.5 (575*)
Synonyms
Geographic Distribution
S.Eu.-Alg.-Tangan.-Madag.-Cutch-Tex.-Mex.-Cuba-Arg.
Age Range
Beginning Stage in Treatise Usage:
Tithon.
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
0
Beginning Date:
149.24
Ending Stage in Treatise Usage:
Tithon.
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Evolute, like Himalayites but whorls mainly rounded, tubercles small and more numerous, tuberculate ribs not flared, and secondaries ending in small ventral tubercles beside smooth band. [Subgen. of Himalayites.]
References
Spath, L. F., 1925, Ammonites and Aptychi [from Somaliland]: Mon. Hunterian Mus. Univ. Glasgow, v. 1, p. 111-164, pl. 15-16.