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Ataxioceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Ataxioceratinae
Formal Genus Name and Reference:
Ataxioceras FONTANNES, 1879
Type Species:
Perisphinctes (Ataxioceras) hypselocyclus
Images
(Click to enlarge in a new window)
Fig. 413,1. *A. hypselocyclus (Font.), Fr., holotype, *.
Synonyms
Parataxioceras
Geographic Distribution
Eu.-So-mali.-Cauc.-Persia-Cutch - ?Japan - ?Indon. - ?Spitz.
Age Range
Beginning Stage in Treatise Usage:
L.Kimm.
Beginning International Stage:
Kimmeridgian
Fraction Up In Beginning Stage:
0
Beginning Date:
154.78
Ending Stage in Treatise Usage:
L.Kimm.
Ending International Stage:
Kimmeridgian
Fraction Up In Ending Stage:
50
Ending Date:
152.01
Description
Compressed, more or less involute, with large irregular constrictions and many secondary ribs, ribbing typically may be bifurcate twice, near middle of the whorl sides, secondaries then branching near shoulders.
References
Fontannes, F ., 1879, Description des ammonites des calcaires du Château de Crussol, Ardèche (zones à Oppelia tenuilobata et Waagenia beckeri): (Paris, Lyon), 122 p., 13 pl.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Ataxioceratinae
Formal Genus Name and Reference:
Ataxioceras FONTANNES, 1879
Type Species:
Perisphinctes (Ataxioceras) hypselocyclus
Images
(Click to enlarge in a new window)
Fig. 413,1. *A. hypselocyclus (Font.), Fr., holotype, *.
Synonyms
Parataxioceras
Geographic Distribution
Eu.-So-mali.-Cauc.-Persia-Cutch - ?Japan - ?Indon. - ?Spitz.
Age Range
Beginning Stage in Treatise Usage:
L.Kimm.
Beginning International Stage:
Kimmeridgian
Fraction Up In Beginning Stage:
0
Beginning Date:
154.78
Ending Stage in Treatise Usage:
L.Kimm.
Ending International Stage:
Kimmeridgian
Fraction Up In Ending Stage:
50
Ending Date:
152.01
Description
Compressed, more or less involute, with large irregular constrictions and many secondary ribs, ribbing typically may be bifurcate twice, near middle of the whorl sides, secondaries then branching near shoulders.
References
Fontannes, F ., 1879, Description des ammonites des calcaires du Château de Crussol, Ardèche (zones à Oppelia tenuilobata et Waagenia beckeri): (Paris, Lyon), 122 p., 13 pl.