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Hannaoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Clydonitaceae
Family:
Choristoceratidae
Formal Genus Name and Reference:
Hannaoceras TOMLIN, 1931
Type Species:
*Am. nasturtium, DIFTMAR, 1866
Images
(Click to enlarge in a new window)
Synonyms
Geographic Distribution
Alps, Sicily, Balkan, Cyprus, Timor, Calif, Nev
Age Range
Beginning Stage in Treatise Usage:
Carn.
Beginning International Stage:
Carnian
Fraction Up In Beginning Stage:
0
Beginning Date:
237
Ending Stage in Treatise Usage:
Nor.
Ending International Stage:
Norian
Fraction Up In Ending Stage:
100
Ending Date:
205.74
Description
Widely umbilicate, compressed, with radial ribs passing over venter, intercostal area narrow. Suture goniatitic to simple ceratitic
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Clydonitaceae
Family:
Choristoceratidae
Formal Genus Name and Reference:
Hannaoceras TOMLIN, 1931
Type Species:
*Am. nasturtium, DIFTMAR, 1866
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
Alps, Sicily, Balkan, Cyprus, Timor, Calif, Nev
Age Range
Beginning Stage in Treatise Usage:
Carn.
Beginning International Stage:
Carnian
Fraction Up In Beginning Stage:
0
Beginning Date:
237
Ending Stage in Treatise Usage:
Nor.
Ending International Stage:
Norian
Fraction Up In Ending Stage:
100
Ending Date:
205.74
Description
Widely umbilicate, compressed, with radial ribs passing over venter, intercostal area narrow. Suture goniatitic to simple ceratitic