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Waagenoperna
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pteriacea
Family:
Isognomonidae
Formal Genus Name and Reference:
Waagenoperna TOKUYAMA, 1959, p. 151
Type Species:
Edentula lateplanata WAAGEN, 1907, p. 97, OD
Images
(Click to enlarge in a new window)
Fig. C52, 1. *W. lateplanata (Waagen), U.Trias., Japan, la,b, LV ext. and ligamental area, X0.85 (950).
Synonyms
Geographic Distribution
Eu.-Asia(Japan)
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Mytiliform, subequivalve, compressed, oblique, with terminal or subterminal beaks, obsolescent anterior auricle, posterior wing undifferentiated, anterior teeth but no posterior teeth present in young shell, all teeth later obsolete
References
\& Tokuyama, Akira, 1959, Daonella in Japan: Univ. Tokyo, Jour. Fac. Sci., sec. 2, v. 12, pt. 1, p. 1-30.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pteriacea
Family:
Isognomonidae
Formal Genus Name and Reference:
Waagenoperna TOKUYAMA, 1959, p. 151
Type Species:
Edentula lateplanata WAAGEN, 1907, p. 97, OD
Images
(Click to enlarge in a new window)
Fig. C52, 1. *W. lateplanata (Waagen), U.Trias., Japan, la,b, LV ext. and ligamental area, X0.85 (950).
Synonyms
Geographic Distribution
Eu.-Asia(Japan)
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Mytiliform, subequivalve, compressed, oblique, with terminal or subterminal beaks, obsolescent anterior auricle, posterior wing undifferentiated, anterior teeth but no posterior teeth present in young shell, all teeth later obsolete
References
\& Tokuyama, Akira, 1959, Daonella in Japan: Univ. Tokyo, Jour. Fac. Sci., sec. 2, v. 12, pt. 1, p. 1-30.