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Eastonia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Mactracea
Family:
Mactridae (surf clams)
Subfamily:
Lutrariinae
Formal Genus Name and Reference:
Eastonia GRAY, 1853
Type Species:
Mactra rugosa HELBLING, 1779, M
Images
(Click to enlarge in a new window)
Fig. E97,7. *E. rugosa (Helbling), Eu., 7a, RV ext., X0.7 (H. Adams & A. Adams, 1856), 7b, c, LV and RV hinges, X1 (510).
Synonyms
Geographic Distribution
Eu.-Medit.
Age Range
Beginning Stage in Treatise Usage:
Rec.
Beginning International Stage:
Greenlandian
Fraction Up In Beginning Stage:
0
Beginning Date:
0.01
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Radiately ribbed or striate except at ends, ovate, pallial sinus deep
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Mactracea
Family:
Mactridae (surf clams)
Subfamily:
Lutrariinae
Formal Genus Name and Reference:
Eastonia GRAY, 1853
Type Species:
Mactra rugosa HELBLING, 1779, M
Images
(Click to enlarge in a new window)
Fig. E97,7. *E. rugosa (Helbling), Eu., 7a, RV ext., X0.7 (H. Adams & A. Adams, 1856), 7b, c, LV and RV hinges, X1 (510).
Synonyms
Geographic Distribution
Eu.-Medit.
Age Range
Beginning Stage in Treatise Usage:
Rec.
Beginning International Stage:
Greenlandian
Fraction Up In Beginning Stage:
0
Beginning Date:
0.01
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Radiately ribbed or striate except at ends, ovate, pallial sinus deep