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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
(Click to enlarge in a new window)
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
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
(Click to enlarge in a new window)
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.