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Tcherskidium
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Pentamerida
Superfamily:
Pentameroidea
Family:
Virgianidae
Formal Genus Name and Reference:
Tcherskidium Nikolaev & SAPELNIKOV, 1969, p. 12
Type Species:
Conchidium? unicum NIKOLAEV, 1968, p. 47, OD
Images
(Click to enlarge in a new window)
Fig. 648a-d. *T. unicum (Nikolaev), Iryudinsk Stage Gorizont, Ina River, Omulevsk Mountains, Russia, ventral, dorsal, lateral, dorsal views, x1$ (Nikolaev & Sapelnikov, 1969).
Synonyms
Geographic Distribution
Russia (Kolyma, Taymyr), northern Greenland, USA (Alaska), South China, ?Kazakhstan
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (middle Ashgill)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
85
Beginning Date:
446.34
Ending Stage in Treatise Usage:
Upper Ordovician (middle Ashgill)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
100
Ending Date:
445.21
Description
Large, costellate, strongly ventribiconvex, elongate, spondylium supported by moderately long median septum, relatively short inner hinge plates, laterally inclined, outer hinge plates about twice as long as inner, crura well developed
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Pentamerida
Superfamily:
Pentameroidea
Family:
Virgianidae
Formal Genus Name and Reference:
Tcherskidium Nikolaev & SAPELNIKOV, 1969, p. 12
Type Species:
Conchidium? unicum NIKOLAEV, 1968, p. 47, OD
Images
(Click to enlarge in a new window)
Fig. 648a-d. *T. unicum (Nikolaev), Iryudinsk Stage Gorizont, Ina River, Omulevsk Mountains, Russia, ventral, dorsal, lateral, dorsal views, x1$ (Nikolaev & Sapelnikov, 1969).
Synonyms
Geographic Distribution
Russia (Kolyma, Taymyr), northern Greenland, USA (Alaska), South China, ?Kazakhstan
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (middle Ashgill)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
85
Beginning Date:
446.34
Ending Stage in Treatise Usage:
Upper Ordovician (middle Ashgill)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
100
Ending Date:
445.21
Description
Large, costellate, strongly ventribiconvex, elongate, spondylium supported by moderately long median septum, relatively short inner hinge plates, laterally inclined, outer hinge plates about twice as long as inner, crura well developed