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Anisocardia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Arcticacea
Family:
Arcticidae
Formal Genus Name and Reference:
Anisocardia MUNIER-CHALMAS, 1863
Type Species:
A. elegans, M
Images
(Click to enlarge in a new window)
Fig. E127,3. *A. (A.) elegans Munier-Chalmas, U.Jur.(Kimmeridg.), France, 3 a, LV ext., X0.7 (1026), 3 b, c, LV and RV hinges, X1 (Cox, 1947).
Synonyms
Apocardia, Cardiodonta
Geographic Distribution
Eu.-Afr.
Age Range
Beginning Stage in Treatise Usage:
M. Jur.(Bajoc.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
L.Cret.(Apt.)
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
100
Ending Date:
113.2
Description
Ovate to subtrigonal or trapezoidal, superficial lunule present in some but no escutcheon, hinge formula Al 1 3a 3b PI/All 2a 2b Pll, with 3b bifid, 1 strongly projecting, 2b chevron-shaped, 2a not well differentiated from AI, PI strong, elongate, PII merged into margin, pallial line posteriorly truncate
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Arcticacea
Family:
Arcticidae
Formal Genus Name and Reference:
Anisocardia MUNIER-CHALMAS, 1863
Type Species:
A. elegans, M
Images
(Click to enlarge in a new window)
Fig. E127,3. *A. (A.) elegans Munier-Chalmas, U.Jur.(Kimmeridg.), France, 3 a, LV ext., X0.7 (1026), 3 b, c, LV and RV hinges, X1 (Cox, 1947).
Synonyms
Apocardia, Cardiodonta
Geographic Distribution
Eu.-Afr.
Age Range
Beginning Stage in Treatise Usage:
M. Jur.(Bajoc.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
L.Cret.(Apt.)
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
100
Ending Date:
113.2
Description
Ovate to subtrigonal or trapezoidal, superficial lunule present in some but no escutcheon, hinge formula Al 1 3a 3b PI/All 2a 2b Pll, with 3b bifid, 1 strongly projecting, 2b chevron-shaped, 2a not well differentiated from AI, PI strong, elongate, PII merged into margin, pallial line posteriorly truncate