Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Cyrtiopsis
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Cyrtospiriferoidea
Family:
Cyrtospiriferidae
Formal Genus Name and Reference:
Cyrtiopsis Grabau, 1923 in 1923-1924, p. 194, SD GRABAU, 1931b, p. 435
Type Species:
C. davidsoni Grabau, 1923 in 1923-1924, p. 195, SD GRABAU, 1931b, p. 435
Images
(Click to enlarge in a new window)
Fig. 1134, 3a-e. *C. davidsoni, holotype, dorsal, ventral, lateral, posterior, and anterior views, X1.5 (Ma & Day, 1999).
Synonyms
Grabauicyrtiopsis, Sinocyrtiopsis
Geographic Distribution
southern China
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian (lower Famennian)
Beginning International Stage:
Famennian
Fraction Up In Beginning Stage:
0
Beginning Date:
371.1
Ending Stage in Treatise Usage:
Upper Devonian (lower Famennian)
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
50
Ending Date:
365.2
Description
Small to large, biconvex to ventribiconvex, equidimensional or elongate, with obtuse cardinal angles, deltidium present, ventral interarea high, slightly curved, apsacline, fold and sulcus prominent, costate, flanks with numerous small, simple plications, surface with radial or subradial capillae, becoming tuberculate, dental plates intrasinal, subparallel, with rudimentary delthyrial plate, ctenophoridium elevated.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Cyrtospiriferoidea
Family:
Cyrtospiriferidae
Formal Genus Name and Reference:
Cyrtiopsis Grabau, 1923 in 1923-1924, p. 194, SD GRABAU, 1931b, p. 435
Type Species:
C. davidsoni Grabau, 1923 in 1923-1924, p. 195, SD GRABAU, 1931b, p. 435
Images
(Click to enlarge in a new window)
Fig. 1134, 3a-e. *C. davidsoni, holotype, dorsal, ventral, lateral, posterior, and anterior views, X1.5 (Ma & Day, 1999).
Synonyms
Grabauicyrtiopsis, Sinocyrtiopsis
Geographic Distribution
southern China
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian (lower Famennian)
Beginning International Stage:
Famennian
Fraction Up In Beginning Stage:
0
Beginning Date:
371.1
Ending Stage in Treatise Usage:
Upper Devonian (lower Famennian)
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
50
Ending Date:
365.2
Description
Small to large, biconvex to ventribiconvex, equidimensional or elongate, with obtuse cardinal angles, deltidium present, ventral interarea high, slightly curved, apsacline, fold and sulcus prominent, costate, flanks with numerous small, simple plications, surface with radial or subradial capillae, becoming tuberculate, dental plates intrasinal, subparallel, with rudimentary delthyrial plate, ctenophoridium elevated.