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Oldhamina

Classification

    Phylum:  
Brachiopoda
    Class:  
Strophomenata
    Order:  
Productida
    Superfamily:  
Lyttonioidea
    Family:  
Lyttoniidae
    Formal Genus Name and Reference:  
Oldhamina WAAGEN, 1883, p. 403
    Type Species:  
Bellerophon decipiens de KONINCK, 1863, p. 8, OD


Images

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Fig. 458, 2a-c. *O. decipiens (de Koninck), Upper Permian, Pakistan, $a, b$, posterior, dorsal views of dorsal valve, $\\mathbf{X}_{3}$, $c$, ventral interior, $\\mathbf{X}_{3}$ (Waagen, 1883).


Synonyms

Waagenopora, Oldhamella, Oldhamia


Geographic Distribution

Asia


Age Range

    Beginning Stage in Treatise Usage:  
Upper Permian
    Beginning International Stage:  
Wuchiapingian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
259.55
    Ending Stage in Treatise Usage:  
Upper Permian
    Ending International Stage:  
Changhsingian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
251.9


Description

Ventral valve strongly convex, surface nearly smooth with fine growth banding, posterior flap recurved and rolled back in successive layers, internal septa medianly high, tapering laterally, sharp, inclined anteriorly, and strongly arcuate toward anterior to accommodate deep concavity of shell interior, dorsal valve with broad flattened hinge region and straight hinge line, cardinal process bilobed, median septum long, sharp, extending to anterior bifurcation of valve, lobes evenly spaced and more or less symmetrical, cambered with trailing edges anterior, external surface finely tuberculate. Upper Permian: Asia.




References



Museum or Author Information

Waagen, 1883