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Myrene
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Arcticacea
Family:
Neomiodontidae
Formal Genus Name and Reference:
Myrene CASEY, 1955
Type Species:
*M. fittoni, OD
Images
(Click to enlarge in a new window)
Fig. E131,4. *M. fittoni, L.Cret., Eng., 4 a, b, RV and LV hinges, X2 (Casey).
Synonyms
Geographic Distribution
Eu.-NE.Asia
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(Oxford.)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
L.Cret.(Ryaz.)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
Cuneiform, trigonal-ovate, or trapezoidal, lunule and escutcheon not clearly defined, posterior slope ridged or carinate, posterior area flattened, with or without second ridge or carina, surface smooth or with concentric riblets, hinge formula, AI AIII 3a 3b 5b PI/AO All 2b 4b PO PII, laterals cross-striate in most, 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:
Myrene CASEY, 1955
Type Species:
*M. fittoni, OD
Images
(Click to enlarge in a new window)
Fig. E131,4. *M. fittoni, L.Cret., Eng., 4 a, b, RV and LV hinges, X2 (Casey).
Synonyms
Geographic Distribution
Eu.-NE.Asia
Age Range
Beginning Stage in Treatise Usage:
U.Jur.(Oxford.)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
L.Cret.(Ryaz.)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
Cuneiform, trigonal-ovate, or trapezoidal, lunule and escutcheon not clearly defined, posterior slope ridged or carinate, posterior area flattened, with or without second ridge or carina, surface smooth or with concentric riblets, hinge formula, AI AIII 3a 3b 5b PI/AO All 2b 4b PO PII, laterals cross-striate in most, pallial line entire.