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Syncyclonema
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pectinacea (scallops and relatives)
Family:
Entoliidae
Formal Genus Name and Reference:
Syncyclonema MEEK, 1864
Type Species:
Pecten rigida Hall & Meek, 1854 (non Sowerby, 1818) = Pecten hallii GABB, 1861), OD
Images
(Click to enlarge in a new window)
Fig. C71,1. *S. rigida (Hall & Meek), USA (Neb.), 1a, b, LV ext., RV ext., × 8 (379)."
Synonyms
Geographic Distribution
U.Cret., N.Am.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
U.Cret.
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Differs from Entolium in straight, shorter hinge, in unequal auricles with rounded sinuosity under anterior ones, and in presence of small, rounded concentric ridges on RV
References
Meek, F. B., 1864, Check list of the invertebrate fossils of North America. Cretaceous and Jurassic: Smithsonian Misc. Coll., no. 177 (in v. 7), 40 p .
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pectinacea (scallops and relatives)
Family:
Entoliidae
Formal Genus Name and Reference:
Syncyclonema MEEK, 1864
Type Species:
Pecten rigida Hall & Meek, 1854 (non Sowerby, 1818) = Pecten hallii GABB, 1861), OD
Images
(Click to enlarge in a new window)
Fig. C71,1. *S. rigida (Hall & Meek), USA (Neb.), 1a, b, LV ext., RV ext., × 8 (379)."
Synonyms
Geographic Distribution
U.Cret., N.Am.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
U.Cret.
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Differs from Entolium in straight, shorter hinge, in unequal auricles with rounded sinuosity under anterior ones, and in presence of small, rounded concentric ridges on RV
References
Meek, F. B., 1864, Check list of the invertebrate fossils of North America. Cretaceous and Jurassic: Smithsonian Misc. Coll., no. 177 (in v. 7), 40 p .