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Crassatina
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Crassatellacea
Family:
Crassatellidae
Subfamily:
Crassatellinae
Formal Genus Name and Reference:
Crassatina KOBELT, 1881
Type Species:
Crassatella triquetra "Sowerby" Reeve (1842) 1843, OD
Images
(Click to enlarge in a new window)
Fig. E74,1a. *C. (C.) triquetra (Reeve), Rec., W.Afr., RV ext., X1 (Reeve, 1843)., Fig. E74,1b. C. (C.) sp. cf. C. bronni (Wood), U.Eoc., Eng., RV hinge, X0.7 (100).
Synonyms
Crassatina
Geographic Distribution
Eu.-Asia(Japan)-Afr
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Subtrigonal to subquadrate, rather small, prosogyrous beaks. Concentric ribs divided or vanishing backward. Narrow lunule and escutcheon. Anterior RV cardinal more or less prolonging laterals, posterior narrow cardinals and elongate laterals. Trigonal resilium.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Crassatellacea
Family:
Crassatellidae
Subfamily:
Crassatellinae
Formal Genus Name and Reference:
Crassatina KOBELT, 1881
Type Species:
Crassatella triquetra "Sowerby" Reeve (1842) 1843, OD
Images
(Click to enlarge in a new window)
Fig. E74,1a. *C. (C.) triquetra (Reeve), Rec., W.Afr., RV ext., X1 (Reeve, 1843)., Fig. E74,1b. C. (C.) sp. cf. C. bronni (Wood), U.Eoc., Eng., RV hinge, X0.7 (100).
Synonyms
Crassatina
Geographic Distribution
Eu.-Asia(Japan)-Afr
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Subtrigonal to subquadrate, rather small, prosogyrous beaks. Concentric ribs divided or vanishing backward. Narrow lunule and escutcheon. Anterior RV cardinal more or less prolonging laterals, posterior narrow cardinals and elongate laterals. Trigonal resilium.