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Eochoristites
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Theodossioidea
Family:
Palaeochoristitidae
Formal Genus Name and Reference:
Eochoristites CHU, 1933, p. 28, *=E. neipentaiensis, OD
Type Species:
E. neipentaiensis, OD
Images
(Click to enlarge in a new window)
Fig. 1128, 1a-j. *E. neipentaiensis, Tournaisian, a-e, holotype, ventral, dorsal, lateral, posterior, and anterior views, × 1, f, transverse section of dorsal valve, g-j, transverse sections of ventral valve, × 1 (Chu, 1933).
Synonyms
Centrospirifer
Geographic Distribution
southeastern China
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian (upper Famennian)
Beginning International Stage:
Famennian
Fraction Up In Beginning Stage:
50
Beginning Date:
365.2
Ending Stage in Treatise Usage:
Carboniferous (Tournaisian)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Medium size, subequally and moderately biconvex, ventral umbo broad, weakly inflated, ventral beak small, moderately incurved, ventral interarea truncated, hinge line nondenticulate, fold and sulcus narrow to moderately wide, weakly developed, costae mostly simple on lateral slopes, sulcus with strong, simple, or bifurcating median costa and several, mostly simple, lateral sulcal costae that bifurcate from bounding costae, dorsal adminicula moderately long, otherwise similar to Palaeochoristites
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Theodossioidea
Family:
Palaeochoristitidae
Formal Genus Name and Reference:
Eochoristites CHU, 1933, p. 28, *=E. neipentaiensis, OD
Type Species:
E. neipentaiensis, OD
Images
(Click to enlarge in a new window)
Fig. 1128, 1a-j. *E. neipentaiensis, Tournaisian, a-e, holotype, ventral, dorsal, lateral, posterior, and anterior views, × 1, f, transverse section of dorsal valve, g-j, transverse sections of ventral valve, × 1 (Chu, 1933).
Synonyms
Centrospirifer
Geographic Distribution
southeastern China
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian (upper Famennian)
Beginning International Stage:
Famennian
Fraction Up In Beginning Stage:
50
Beginning Date:
365.2
Ending Stage in Treatise Usage:
Carboniferous (Tournaisian)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Medium size, subequally and moderately biconvex, ventral umbo broad, weakly inflated, ventral beak small, moderately incurved, ventral interarea truncated, hinge line nondenticulate, fold and sulcus narrow to moderately wide, weakly developed, costae mostly simple on lateral slopes, sulcus with strong, simple, or bifurcating median costa and several, mostly simple, lateral sulcal costae that bifurcate from bounding costae, dorsal adminicula moderately long, otherwise similar to Palaeochoristites