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Costirhynchopsis
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Cyclothyrididae
Formal Genus Name and Reference:
Costirhynchopsis DAGYS, 1977, p. 387
Type Species:
Costirhynchia spatiosa DAGYS, 1974, p. 106, OD
Images
(Click to enlarge in a new window)
Fig. 901, 1a-k. * C. spatiosa (DAGYS), Carnian, northwestern Caucasus, $a-d$, holotype, dorsal, lateral, anterior, ventral views, IGiG 394/55, x2$, $e-k$, transverse serial sections, distances in mm from first section, 0.2, 1.1, 1.5, 1.9, 2.2, 2.6, 3.1, IGiG 394/58 (Dagys, 1974).
Synonyms
Geographic Distribution
Alps, Balkans, central Europe, Carpathians, northwestern Caucasus, Pamirs, northeastern Iran, China, ?New Guinea
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic (Anisian)
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Upper Triassic (Carnian)
Ending International Stage:
Carnian
Fraction Up In Ending Stage:
100
Ending Date:
227.3
Description
Small to medium size, laterally oval to wide subpentagonal, uniplicate, with fold low or absent, thickest near front, strongly costate throughout, beak suberect, ridges distinct, foramen hypothyrid, deltidial plates disjunct. Dental plates ventrally divergent, septalium short, supported by low septum, crura raduliform, pedicle collar absent.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Cyclothyrididae
Formal Genus Name and Reference:
Costirhynchopsis DAGYS, 1977, p. 387
Type Species:
Costirhynchia spatiosa DAGYS, 1974, p. 106, OD
Images
(Click to enlarge in a new window)
Fig. 901, 1a-k. * C. spatiosa (DAGYS), Carnian, northwestern Caucasus, $a-d$, holotype, dorsal, lateral, anterior, ventral views, IGiG 394/55, x2$, $e-k$, transverse serial sections, distances in mm from first section, 0.2, 1.1, 1.5, 1.9, 2.2, 2.6, 3.1, IGiG 394/58 (Dagys, 1974).
Synonyms
Geographic Distribution
Alps, Balkans, central Europe, Carpathians, northwestern Caucasus, Pamirs, northeastern Iran, China, ?New Guinea
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic (Anisian)
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Upper Triassic (Carnian)
Ending International Stage:
Carnian
Fraction Up In Ending Stage:
100
Ending Date:
227.3
Description
Small to medium size, laterally oval to wide subpentagonal, uniplicate, with fold low or absent, thickest near front, strongly costate throughout, beak suberect, ridges distinct, foramen hypothyrid, deltidial plates disjunct. Dental plates ventrally divergent, septalium short, supported by low septum, crura raduliform, pedicle collar absent.