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Crurithyris
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Ambocoelioidea
Family:
Ambocoeliidae
Formal Genus Name and Reference:
Crurithyris GEORGE, 1931, p. 42
Type Species:
Spirifer urei FLEMING, 1828, p. 376, OD
Images
(Click to enlarge in a new window)
Fig. 1138, 4 a-d .*C. urei (Fleming), Mississippian, Carboniferous, Great Britain, a-b, lectotype, ventral and dorsal views, X9 (George, 1931), c, dorsal interior, X20, d, microornament, X75 (Brunton, 1984).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian
Beginning International Stage:
Frasnian
Fraction Up In Beginning Stage:
0
Beginning Date:
378.9
Ending Stage in Treatise Usage:
Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Ventribiconvex, both valves with weak sulci, anterior commissure emarginate, microornament of fine spinules of 2 distinct sizes, roughly concentrically arranged, cardinal process knoblike, dorsal interior with adductor scars in normal position, otherwise similar to Ambocoelia
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Ambocoelioidea
Family:
Ambocoeliidae
Formal Genus Name and Reference:
Crurithyris GEORGE, 1931, p. 42
Type Species:
Spirifer urei FLEMING, 1828, p. 376, OD
Images
(Click to enlarge in a new window)
Fig. 1138, 4 a-d .*C. urei (Fleming), Mississippian, Carboniferous, Great Britain, a-b, lectotype, ventral and dorsal views, X9 (George, 1931), c, dorsal interior, X20, d, microornament, X75 (Brunton, 1984).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian
Beginning International Stage:
Frasnian
Fraction Up In Beginning Stage:
0
Beginning Date:
378.9
Ending Stage in Treatise Usage:
Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Ventribiconvex, both valves with weak sulci, anterior commissure emarginate, microornament of fine spinules of 2 distinct sizes, roughly concentrically arranged, cardinal process knoblike, dorsal interior with adductor scars in normal position, otherwise similar to Ambocoelia