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Neomiodon
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Arcticacea
Family:
Neomiodontidae
Formal Genus Name and Reference:
Neomiodon FISCHER, 1887 [pro Miodon SAND- BERGER, 1871 (non DUMERIL, 1859)]
Type Species:
Cyclas medius J. de C. Sowerby, 1826, SD DALL, 1903
Images
(Click to enlarge in a new window)
Fig. E131,8. *N. medius (Sowerby), U.Jur.(Purbeck.), Eng., 8a-d, LV ext., RV int., LV hinge, LV dorsal, X1.5 (Casey)
Synonyms
Bidentina, Miodontopsis, Protomiodon
Geographic Distribution
Eurasia
Age Range
Beginning Stage in Treatise Usage:
M.Jur.(Bathon.)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
L.Crt.(Weald.))
Ending International Stage:
Barremian
Fraction Up In Ending Stage:
50
Ending Date:
123.95
Description
Subtrigonal, ovate to suborbicular, with no definite lunule or escutcheon, smooth or with weak concentric sculpture, posterior slope more or less ridged; hinge formula, Al Alll 3a 3b PI PIlllAll 2b 4b Pll, laterals minutely cross-striate; pallial line entire.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Arcticacea
Family:
Neomiodontidae
Formal Genus Name and Reference:
Neomiodon FISCHER, 1887 [pro Miodon SAND- BERGER, 1871 (non DUMERIL, 1859)]
Type Species:
Cyclas medius J. de C. Sowerby, 1826, SD DALL, 1903
Images
(Click to enlarge in a new window)
Fig. E131,8. *N. medius (Sowerby), U.Jur.(Purbeck.), Eng., 8a-d, LV ext., RV int., LV hinge, LV dorsal, X1.5 (Casey)
Synonyms
Bidentina, Miodontopsis, Protomiodon
Geographic Distribution
Eurasia
Age Range
Beginning Stage in Treatise Usage:
M.Jur.(Bathon.)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
L.Crt.(Weald.))
Ending International Stage:
Barremian
Fraction Up In Ending Stage:
50
Ending Date:
123.95
Description
Subtrigonal, ovate to suborbicular, with no definite lunule or escutcheon, smooth or with weak concentric sculpture, posterior slope more or less ridged; hinge formula, Al Alll 3a 3b PI PIlllAll 2b 4b Pll, laterals minutely cross-striate; pallial line entire.