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Choristites
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Spiriferoidea
Family:
Choristitidae
Formal Genus Name and Reference:
Choristites Fischer de WALDHEIM, 1825, p. 7
Type Species:
* C. mosquensis, SD BUCKMAN, 1908, p. 30
Images
(Click to enlarge in a new window)
Fig. 1178, 1a-c. *C. mosquensis, Moscovian, Moscow basin, ventral and dorsal valves, ventral interior, X1 (Ivanov & Ivanova, 1937).
Synonyms
Yatsengina, Betachoristites, Jatsengina
Geographic Distribution
Eurasia
Age Range
Beginning Stage in Treatise Usage:
Carboniferous (?Mississippian, Pennsylvanian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Permian (?Cisuralian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Medium to large, outline longitudinally to transversely subovate, often nearly equidimensional, ventral valve strongly inflated, umbonal region strongly incurved, cardinal extremities abruptly truncated laterally, interarea trapezoidal, hinge line usually less than maximum width, entire surface with numerous flattened, simple or bifurcating costae with narrow interspaces, microornament capillate, fold and sulcus well developed, spreading anteriorly, incorporating additional costae, ventral interior with long, slender, nearly parallel dental adminicula, adductors enclosed within adminicula, adminicula surrounded by small, rounded area of impressed pits, function unknown
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Spiriferoidea
Family:
Choristitidae
Formal Genus Name and Reference:
Choristites Fischer de WALDHEIM, 1825, p. 7
Type Species:
* C. mosquensis, SD BUCKMAN, 1908, p. 30
Images
(Click to enlarge in a new window)
Fig. 1178, 1a-c. *C. mosquensis, Moscovian, Moscow basin, ventral and dorsal valves, ventral interior, X1 (Ivanov & Ivanova, 1937).
Synonyms
Yatsengina, Betachoristites, Jatsengina
Geographic Distribution
Eurasia
Age Range
Beginning Stage in Treatise Usage:
Carboniferous (?Mississippian, Pennsylvanian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Permian (?Cisuralian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Medium to large, outline longitudinally to transversely subovate, often nearly equidimensional, ventral valve strongly inflated, umbonal region strongly incurved, cardinal extremities abruptly truncated laterally, interarea trapezoidal, hinge line usually less than maximum width, entire surface with numerous flattened, simple or bifurcating costae with narrow interspaces, microornament capillate, fold and sulcus well developed, spreading anteriorly, incorporating additional costae, ventral interior with long, slender, nearly parallel dental adminicula, adductors enclosed within adminicula, adminicula surrounded by small, rounded area of impressed pits, function unknown