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Chaoina
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Permianelloidea
Family:
Nomina Nuda
Formal Genus Name and Reference:
Chaoina Ching Yu-gan in Ching Yu-gan, Liao Zhaoting, & Hou HONG-FEI, 1974, p. 308
Type Species:
C. reticulatia, OD
Images
(Click to enlarge in a new window)
Fig. 464, 4 a, b .{ }^{*} C$. reticulata, Chihsian Formation, Sichuan, $a$, dorsal valve interior with much of shell missing, x2, b$, ventral valve viewed anteroventrally, x1$ (new)"
Synonyms
Geographic Distribution
southwestern China
Age Range
Beginning Stage in Treatise Usage:
Lower Permian (Kungurian)
Beginning International Stage:
Kungurian
Fraction Up In Beginning Stage:
0
Beginning Date:
283.3
Ending Stage in Treatise Usage:
Lower Permian (Kungurian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Small, subquadrate, widest at hinge, dorsal valve sharply geniculate, but with shallow corpus cavity, ribbing strong, almost entirely costate, rugae on disks, spines in rows separating ears and scattered on ventral valve, cardinal process small, sessile, cardinal ridge thin, adductor scars elevated anteriorly, brachial ridges obscure. [Genus and species not defined, possibly belonging to the Productinae.]
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Permianelloidea
Family:
Nomina Nuda
Formal Genus Name and Reference:
Chaoina Ching Yu-gan in Ching Yu-gan, Liao Zhaoting, & Hou HONG-FEI, 1974, p. 308
Type Species:
C. reticulatia, OD
Images
(Click to enlarge in a new window)
Fig. 464, 4 a, b .{ }^{*} C$. reticulata, Chihsian Formation, Sichuan, $a$, dorsal valve interior with much of shell missing, x2, b$, ventral valve viewed anteroventrally, x1$ (new)"
Synonyms
Geographic Distribution
southwestern China
Age Range
Beginning Stage in Treatise Usage:
Lower Permian (Kungurian)
Beginning International Stage:
Kungurian
Fraction Up In Beginning Stage:
0
Beginning Date:
283.3
Ending Stage in Treatise Usage:
Lower Permian (Kungurian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Small, subquadrate, widest at hinge, dorsal valve sharply geniculate, but with shallow corpus cavity, ribbing strong, almost entirely costate, rugae on disks, spines in rows separating ears and scattered on ventral valve, cardinal process small, sessile, cardinal ridge thin, adductor scars elevated anteriorly, brachial ridges obscure. [Genus and species not defined, possibly belonging to the Productinae.]