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Aulacosphinctoides
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Virgatosphinctinae
Formal Genus Name and Reference:
Aulacosphinctoides SPATH, 1923
Type Species:
Aulacosphinctes infundibulus UHLIG, 1910
Images
(Click to enlarge in a new window)
Fig. 426,1. *A. infundibulus/lus (UHLIG), M.Spiti sh., Himalaya; la,b. X0.5 (533*)
Synonyms
Geographic Distribution
Somali.-Cutch- Himalaya-Japan-N. Z. - Mex.-Arg.
Age Range
Beginning Stage in Treatise Usage:
U.Kimm.
Beginning International Stage:
Kimmeridgian
Fraction Up In Beginning Stage:
50
Beginning Date:
152.01
Ending Stage in Treatise Usage:
L.Tithon.
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
70
Ending Date:
144.94
Description
Closely resembles and passes into Torquatisphinctes but typically differs by having more rounded or depressed whorls and more sigmoid and frequently triplicate ribbing; lappets present.
References
Spath, L. F., 1923, The ammonites of the Shales-withBeef: Quart. Jour. Geol. Soc. (London), v. 79, p. 66-88.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Virgatosphinctinae
Formal Genus Name and Reference:
Aulacosphinctoides SPATH, 1923
Type Species:
Aulacosphinctes infundibulus UHLIG, 1910
Images
(Click to enlarge in a new window)
Fig. 426,1. *A. infundibulus/lus (UHLIG), M.Spiti sh., Himalaya; la,b. X0.5 (533*)
Synonyms
Geographic Distribution
Somali.-Cutch- Himalaya-Japan-N. Z. - Mex.-Arg.
Age Range
Beginning Stage in Treatise Usage:
U.Kimm.
Beginning International Stage:
Kimmeridgian
Fraction Up In Beginning Stage:
50
Beginning Date:
152.01
Ending Stage in Treatise Usage:
L.Tithon.
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
70
Ending Date:
144.94
Description
Closely resembles and passes into Torquatisphinctes but typically differs by having more rounded or depressed whorls and more sigmoid and frequently triplicate ribbing; lappets present.
References
Spath, L. F., 1923, The ammonites of the Shales-withBeef: Quart. Jour. Geol. Soc. (London), v. 79, p. 66-88.