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Spiticeras
Classification
Phylum:
Unknown
Class:
Unknown
Order:
Unknown
Superfamily:
Perisphinctaceae
Family:
Olcostephanidae
Formal Genus Name and Reference:
Spiticeras UHLIG, 1903, p. 83
Type Species:
Ammonites spitiensis Blanford, 1863, p. 131, SD ROMAN, 1938, p. 380
Images
(Click to enlarge in a new window)
FIG. 31,1a–d. *S. (S.) spitiense (BLANFORD), Berriasian, India (Spiti Valley); a,b, holotype, ×0.5; c,d, paratype, ×0.5 (Uhlig, 1903).——FIG. 31,1e,f. S. (S.) gregoryi (S PATH ), Berriasian, Somalia; × 0.5 (Spath, 1925b).
Synonyms
Somaliceras
Geographic Distribution
southern and central Europe, northern Africa, Somalia, Madagascar, Iraq, Yemen, Pakistan, India, California, Mexico, Cuba, Argentina, Chile
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (Upper Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
70
Beginning Date:
144.94
Ending Stage in Treatise Usage:
Lower Cretaceous (Berriasian)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
Inner whorls inflated, with ribs branching from midlateral tubercles, later whorls inflated to compressed or subquadrate, with fine ribs branching from umbilical tubercles, but some species tending to become smooth, curved constrictions generally present. Suture with more or less strongly developed suspensive lobe.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Unknown
Order:
Unknown
Superfamily:
Perisphinctaceae
Family:
Olcostephanidae
Formal Genus Name and Reference:
Spiticeras UHLIG, 1903, p. 83
Type Species:
Ammonites spitiensis Blanford, 1863, p. 131, SD ROMAN, 1938, p. 380
Images
(Click to enlarge in a new window)
FIG. 31,1a–d. *S. (S.) spitiense (BLANFORD), Berriasian, India (Spiti Valley); a,b, holotype, ×0.5; c,d, paratype, ×0.5 (Uhlig, 1903).——FIG. 31,1e,f. S. (S.) gregoryi (S PATH ), Berriasian, Somalia; × 0.5 (Spath, 1925b).
Synonyms
Somaliceras
Geographic Distribution
southern and central Europe, northern Africa, Somalia, Madagascar, Iraq, Yemen, Pakistan, India, California, Mexico, Cuba, Argentina, Chile
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (Upper Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
70
Beginning Date:
144.94
Ending Stage in Treatise Usage:
Lower Cretaceous (Berriasian)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
Inner whorls inflated, with ribs branching from midlateral tubercles, later whorls inflated to compressed or subquadrate, with fine ribs branching from umbilical tubercles, but some species tending to become smooth, curved constrictions generally present. Suture with more or less strongly developed suspensive lobe.