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Clydoniceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Steogabicerataceae
Family:
Clydoniceratidae
Formal Genus Name and Reference:
Clydoniceras BLAKE, 1905
Type Species:
Am. discus J.SOWERBY, 1813
Images
(Click to enlarge in a new window)
Fig, 346,1. *C. discus (Sow.), Eng., 1a,b, holotype, x0.5 (14*)
Synonyms
Harpoceratidarum, Benedictites
Geographic Distribution
Eu.-N.Afr.-Sinai-C.Arabia - Baluch. - Madag.
Age Range
Beginning Stage in Treatise Usage:
M.Bath.
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
40
Beginning Date:
167.02
Ending Stage in Treatise Usage:
U.Bath.
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Smooth or with gently falcoid ribs, tall keel on early whorls, lost later, when venter becomes acute, umbilicus minute or occluded, except in last whorl. Accessory lobes of sutures tend to be digitate.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Steogabicerataceae
Family:
Clydoniceratidae
Formal Genus Name and Reference:
Clydoniceras BLAKE, 1905
Type Species:
Am. discus J.SOWERBY, 1813
Images
(Click to enlarge in a new window)
Fig, 346,1. *C. discus (Sow.), Eng., 1a,b, holotype, x0.5 (14*)
Synonyms
Harpoceratidarum, Benedictites
Geographic Distribution
Eu.-N.Afr.-Sinai-C.Arabia - Baluch. - Madag.
Age Range
Beginning Stage in Treatise Usage:
M.Bath.
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
40
Beginning Date:
167.02
Ending Stage in Treatise Usage:
U.Bath.
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Smooth or with gently falcoid ribs, tall keel on early whorls, lost later, when venter becomes acute, umbilicus minute or occluded, except in last whorl. Accessory lobes of sutures tend to be digitate.