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Inoperna
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Mytiloida
Superfamily:
Mytilacea (mussels)
Family:
Mytilidae
Subfamily:
Lithophaginae
Formal Genus Name and Reference:
Inoperna Conrad in KERR, 1875
Type Species:
Modiolus (I.) carolinensis Conrad, 1875, SD STEPHENSON, 1923, p. 239
Images
(Click to enlarge in a new window)
Fig. C20,11. *I. carolinensis (Conrad), U. Cret., USA(Tex.), RV ext., X1 (881).
Synonyms
Pharomytilus
Geographic Distribution
L.Jur.(U.Lias.)-U.Cret., cosmop.
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.
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Narrow, elongate, with nearly parallel dorsal and ventral margins, surface divided by diagonal ridge, part ventral to ridge smooth, that dorsal to it bearing folds which are parallel to growth stages, strong near dorsal margin but split up into weaker and more numerous ones halfway between margin and diagonal ridge
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Mytiloida
Superfamily:
Mytilacea (mussels)
Family:
Mytilidae
Subfamily:
Lithophaginae
Formal Genus Name and Reference:
Inoperna Conrad in KERR, 1875
Type Species:
Modiolus (I.) carolinensis Conrad, 1875, SD STEPHENSON, 1923, p. 239
Images
(Click to enlarge in a new window)
Fig. C20,11. *I. carolinensis (Conrad), U. Cret., USA(Tex.), RV ext., X1 (881).
Synonyms
Pharomytilus
Geographic Distribution
L.Jur.(U.Lias.)-U.Cret., cosmop.
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.
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Narrow, elongate, with nearly parallel dorsal and ventral margins, surface divided by diagonal ridge, part ventral to ridge smooth, that dorsal to it bearing folds which are parallel to growth stages, strong near dorsal margin but split up into weaker and more numerous ones halfway between margin and diagonal ridge