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Inoceramya
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pteriacea
Family:
Inoceramidae
Formal Genus Name and Reference:
Inoceramya ULRICH, 1904, p. 134
Type Species:
I. concentrica, M
Images
(Click to enlarge in a new window)
Fig. C48,5. *I. concentrica, 5 a, RV (reconstr.), X0.7, 5 b, post. part of hinge and internal rib, X1 (Ulrich, 1904).
Synonyms
Geographic Distribution
Yakutat Formation (Mesoz., system uncertain), Alaska
Age Range
Beginning Stage in Treatise Usage:
Mesoz., system uncertain
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
Mesoz., system uncertain
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Medium-sized, thin-shelled, suborbicular, compressed, probably equivalve, umbones near middle of hinge margin, not protruding, ligamental pits small and numerous, decreasing in size toward ends of hinge margin, internally with riblike swelling which extends obliquely backward from umbo, ornament of regular concentric plications which are absent from posterodorsal region
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pteriacea
Family:
Inoceramidae
Formal Genus Name and Reference:
Inoceramya ULRICH, 1904, p. 134
Type Species:
I. concentrica, M
Images
(Click to enlarge in a new window)
Fig. C48,5. *I. concentrica, 5 a, RV (reconstr.), X0.7, 5 b, post. part of hinge and internal rib, X1 (Ulrich, 1904).
Synonyms
Geographic Distribution
Yakutat Formation (Mesoz., system uncertain), Alaska
Age Range
Beginning Stage in Treatise Usage:
Mesoz., system uncertain
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
Mesoz., system uncertain
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Medium-sized, thin-shelled, suborbicular, compressed, probably equivalve, umbones near middle of hinge margin, not protruding, ligamental pits small and numerous, decreasing in size toward ends of hinge margin, internally with riblike swelling which extends obliquely backward from umbo, ornament of regular concentric plications which are absent from posterodorsal region