Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Cyrtospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Cyrtospiriferoidea
Family:
Cyrtospiriferidae
Formal Genus Name and Reference:
Cyrtospirifer Nalivkin in FREDERIKS, 1924, p. 312
Type Species:
Spirifer Verneuili MURCHISON, 1840, p. 252, OD
Images
(Click to enlarge in a new window)
Fig. 1132, la-f. *C. verneuili (MURchISON), Frasnian, France, a-e, ventral, dorsal, anterior, posterior, and lateral views, f, ventral valve internal mold, X1 (new).
Synonyms
Hunanospirifer, Grabauispirifer, Eurytatospirifer, Deothossia, Lamarckispirifer, Subquadriangulispirifer
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 (lower Famennian)
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
50
Ending Date:
365.2
Description
Medium to large, ventribiconvex, moderately transverse, cardinal angles acute, commonly auriculate, ventral interarea high, strongly curved, apsacline, fold and sulcus broad, well defined, not prominent, costae of fold and sulcus increasing by implantation, flanks with numerous simple, rounded costae, surface with capillae and fila, dental plates extrasinal to sulcus bounding, ctenophoridium on median ridge
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Cyrtospiriferoidea
Family:
Cyrtospiriferidae
Formal Genus Name and Reference:
Cyrtospirifer Nalivkin in FREDERIKS, 1924, p. 312
Type Species:
Spirifer Verneuili MURCHISON, 1840, p. 252, OD
Images
(Click to enlarge in a new window)
Fig. 1132, la-f. *C. verneuili (MURchISON), Frasnian, France, a-e, ventral, dorsal, anterior, posterior, and lateral views, f, ventral valve internal mold, X1 (new).
Synonyms
Hunanospirifer, Grabauispirifer, Eurytatospirifer, Deothossia, Lamarckispirifer, Subquadriangulispirifer
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 (lower Famennian)
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
50
Ending Date:
365.2
Description
Medium to large, ventribiconvex, moderately transverse, cardinal angles acute, commonly auriculate, ventral interarea high, strongly curved, apsacline, fold and sulcus broad, well defined, not prominent, costae of fold and sulcus increasing by implantation, flanks with numerous simple, rounded costae, surface with capillae and fila, dental plates extrasinal to sulcus bounding, ctenophoridium on median ridge