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Theodossia

Classification

    Phylum:  
Brachiopoda
    Subphylum:  
Rhynchonelliformea
    Class:  
Rhynchonellata
    Order:  
Spiriferida
    Suborder:  
Spiriferina
    Superfamily:  
Theodossioidea
    Family:  
Theodossiidae
    Subfamily:  
Theodossiinae
    Formal Genus Name and Reference:  
Theodossia NALIVKIN, 1925, p. 267
    Type Species:  
Spirifer Anossofi DE VERNEUIL, 1845, p. 153; OD


Images

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Fig. 1122a–b. *T. anossofi (DE VERNEUIL), Russia; lectotype, dorsal and anterior views, ×1 (Vandercammen, 1959).——Fig. 1123a–b. *T. anossofi (DE VERNEUIL), Russia; lectotype, lateral and ventral views, ×1 (Vandercammen, 1959).


Synonyms

Vandergrachtella


Geographic Distribution

cosmopolitan


Age Range

    Beginning Stage in Treatise Usage:  
Upper Devonian (Frasnian)
    Beginning International Stage:  
Frasnian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
378.9
    Ending Stage in Treatise Usage:  
Upper Devonian (Frasnian)
    Ending International Stage:  
Frasnian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
371.1


Description

Medium size, ventribiconvex, equidimensional to moderately transverse; cardinal angles obtusely rounded; ventral interarea strongly curved, apsacline to orthocline; fold and sulcus not prominent, blending with flanks; costae simple on fold, sulcus, and flanks, rarely bifurcating anteriorly on fold and sulcus; capillate; dental plates thin, straight, extrasinal; short crural plates obscured by callus; ctenophoridium elevated.




References



Museum or Author Information