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Cryptospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Athyridoidea
Family:
Athyrididae
Formal Genus Name and Reference:
Cryptospirifer GRABAU, 1931c, p. 405
Type Species:
C. omeishanensis Huang, 1933, p. 44, SD Wang, Ching, & FANG, 1964, p. 512
Images
(Click to enlarge in a new window)
Fig. 1035, 4a-b. *C. omeishanensis Huang, Sichuan, southern China, holotype, ventral and posterior views, NIGP 4708, x0.5$ (Huang, 1933, photographs courtesy of Jin Yu-gan)."
Synonyms
Geographic Distribution
southern China, Iran, Turkey, Armenia
Age Range
Beginning Stage in Treatise Usage:
Lower Permian
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Lower Permian
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Biconvex, transverse to subcircular or elongate oval, massive shells, without dorsal fold and ventral sulcus, few growth lines irregularly spaced, ventral beak short, strongly curved concealing small foramen, cardinal plate ventrally concave, cardinal flanges well developed, dorsal myophragm present. Lower Permian: southern China, Iran, Turkey, Armenia.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Athyridoidea
Family:
Athyrididae
Formal Genus Name and Reference:
Cryptospirifer GRABAU, 1931c, p. 405
Type Species:
C. omeishanensis Huang, 1933, p. 44, SD Wang, Ching, & FANG, 1964, p. 512
Images
(Click to enlarge in a new window)
Fig. 1035, 4a-b. *C. omeishanensis Huang, Sichuan, southern China, holotype, ventral and posterior views, NIGP 4708, x0.5$ (Huang, 1933, photographs courtesy of Jin Yu-gan)."
Synonyms
Geographic Distribution
southern China, Iran, Turkey, Armenia
Age Range
Beginning Stage in Treatise Usage:
Lower Permian
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Lower Permian
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Biconvex, transverse to subcircular or elongate oval, massive shells, without dorsal fold and ventral sulcus, few growth lines irregularly spaced, ventral beak short, strongly curved concealing small foramen, cardinal plate ventrally concave, cardinal flanges well developed, dorsal myophragm present. Lower Permian: southern China, Iran, Turkey, Armenia.