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Neocrassina
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Crassatellacea
Family:
Astartidae
Subfamily:
Astartinae
Formal Genus Name and Reference:
Neocrassina FISCHER, 1886 1887
Type Species:
Astarte obliqua Deshayes, 1830 (=Cypricardia obliqua LAMARCK, 1819)
Images
(Click to enlarge in a new window)
Fig. E67,1. *N. (N.) obliqua (LAMARCK), Bajoc., W .France; 1a-c, RV ext., int., L V int., X0.5 (Bayle, 1879)
Synonyms
Puschia, Oreada, Pruvostiella
Geographic Distribution
Eu.-Madag.-S.Afr.
Age Range
Beginning Stage in Treatise Usage:
L.Jur.(U.Lias.)
Beginning International Stage:
Pliensbachian
Fraction Up In Beginning Stage:
0
Beginning Date:
192.9
Ending Stage in Treatise Usage:
U.Cret.(Turon.)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
100
Ending Date:
89.39
Description
Ovate or trapezoidal, inequilateral, rather thick, concentric ribs commonly vanishing on adults. Two trigonal cardinals and strong posterior lateral on each valve. Broad flattened nymph, no 5b. Margin denticulated or not.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Crassatellacea
Family:
Astartidae
Subfamily:
Astartinae
Formal Genus Name and Reference:
Neocrassina FISCHER, 1886 1887
Type Species:
Astarte obliqua Deshayes, 1830 (=Cypricardia obliqua LAMARCK, 1819)
Images
(Click to enlarge in a new window)
Fig. E67,1. *N. (N.) obliqua (LAMARCK), Bajoc., W .France; 1a-c, RV ext., int., L V int., X0.5 (Bayle, 1879)
Synonyms
Puschia, Oreada, Pruvostiella
Geographic Distribution
Eu.-Madag.-S.Afr.
Age Range
Beginning Stage in Treatise Usage:
L.Jur.(U.Lias.)
Beginning International Stage:
Pliensbachian
Fraction Up In Beginning Stage:
0
Beginning Date:
192.9
Ending Stage in Treatise Usage:
U.Cret.(Turon.)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
100
Ending Date:
89.39
Description
Ovate or trapezoidal, inequilateral, rather thick, concentric ribs commonly vanishing on adults. Two trigonal cardinals and strong posterior lateral on each valve. Broad flattened nymph, no 5b. Margin denticulated or not.