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Myoconcha
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Carditacea
Family:
Permophoridae
Subfamily:
Myoconchinae
Formal Genus Name and Reference:
Myoconcha J. DE C. SOWERBY, 1824
Type Species:
M. crassa; M
Images
(Click to enlarge in a new window)
Fig. E46,2. *M. (M.) crassa, M.Jur.(Bajoc.), France, 2a-c, RV ext., hinge, LV hinge, X1 (Chavan, n).
Synonyms
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Perm., L.Jur.(Lias.)
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
U.Cret.(Senon.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Large, with terminal beaks, ribs vanishing toward anterior side. Cardinals nearly straight, those of LV very thin, low, 3b generally trigonal, myophoric buttress low, moderate in extent.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Carditacea
Family:
Permophoridae
Subfamily:
Myoconchinae
Formal Genus Name and Reference:
Myoconcha J. DE C. SOWERBY, 1824
Type Species:
M. crassa; M
Images
(Click to enlarge in a new window)
Fig. E46,2. *M. (M.) crassa, M.Jur.(Bajoc.), France, 2a-c, RV ext., hinge, LV hinge, X1 (Chavan, n).
Synonyms
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Perm., L.Jur.(Lias.)
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
U.Cret.(Senon.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Large, with terminal beaks, ribs vanishing toward anterior side. Cardinals nearly straight, those of LV very thin, low, 3b generally trigonal, myophoric buttress low, moderate in extent.