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Retroceramus
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pteriacea
Family:
Inoceramidae
Formal Genus Name and Reference:
R. (Retroceramus) $=$ Eoinoceramus Voronetz, 1961, p. 81 (type, Inoceramus porrectus ELCHWALD, 1871)
Type Species:
Eoinoceramus Voronetz, 1961, p. 81 (type, Inoceramus porrectus ELCHWALD, 1871)
Images
(Click to enlarge in a new window)
Synonyms
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
U.Trias., L.Jur.(Pliensbach.)
Beginning International Stage:
Pliensbachian
Fraction Up In Beginning Stage:
0
Beginning Date:
192.9
Ending Stage in Treatise Usage:
U.Jur.(Kimmeridg.)
Ending International Stage:
Kimmeridgian
Fraction Up In Ending Stage:
100
Ending Date:
149.24
Description
Obliquely oval, broadening in ventral direction, concentric folds regularly arranged
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:
R. (Retroceramus) $=$ Eoinoceramus Voronetz, 1961, p. 81 (type, Inoceramus porrectus ELCHWALD, 1871)
Type Species:
Eoinoceramus Voronetz, 1961, p. 81 (type, Inoceramus porrectus ELCHWALD, 1871)
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
U.Trias., L.Jur.(Pliensbach.)
Beginning International Stage:
Pliensbachian
Fraction Up In Beginning Stage:
0
Beginning Date:
192.9
Ending Stage in Treatise Usage:
U.Jur.(Kimmeridg.)
Ending International Stage:
Kimmeridgian
Fraction Up In Ending Stage:
100
Ending Date:
149.24
Description
Obliquely oval, broadening in ventral direction, concentric folds regularly arranged