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Langsonella

Classification

    Phylum:  
Mollusca
    Class:  
Bivalvia
    Subclass:  
Pteriomorphia
    Order:  
Pterioida
    Suborder:  
Pteriina
    Superfamily:  
Pteriacea
    Family:  
Bakevelliidae
    Formal Genus Name and Reference:  
Langsonella PATTE, 1926, p. 139
    Type Species:  
Gervilleia (Cultriopsis) elongata Mansuy, 1919, p. 7 (non Gervillia elongata Portlock, 1843) ( = *Langsonella mansuyi COX, 1961, M


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Synonyms



Geographic Distribution

Tonkin-Malaya


Age Range

    Beginning Stage in Treatise Usage:  
Trias.
    Beginning International Stage:  
Induan
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
251.9
    Ending Stage in Treatise Usage:  
Trias.
    Ending International Stage:  
Rhaetian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
201.36


Description

Rather small, elongate, subcylindrical, not oblique, highly inequivalve, LV strongly convex, diagonally carinate, with broad, scarcely protruding umbonal region and large, indistinctly delimited anterior wing, dentition imperfectly known




References

Patte, Etienne, 1926, Études paléontologiques relatives à la géologie de l'est du Tonkin (Paléozoique et Trias): Serv. Géol. Indo-Chine, Bull., v. 15, pt. 1, 241 p., 12 pl.


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