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Rhynchopora
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchoporoidea
Family:
Rhynchoporidae
Formal Genus Name and Reference:
Rhynchopora KING, 1865, p. 124
Type Species:
Terebratula geinitziana de VERNEUIL, 1845, p. 83, OD
Images
(Click to enlarge in a new window)
Fig. 840, 1a-f. * R. geinitziana (dE Verneuil), lower Kazanian, North Dvina River Basin, Shidrovo, northern European Russia, $a-b$, holotype, dorsal and lateral views, x1$ (de Verneuil, 1845), $c-e$, ventral, anterior, and lateral views, x2$, $f$, punctae on ground surface 10 mm from beak, x19$ (Erlanger, 1981)., ——Fig. 840, $1 \\mathrm{~g}-$ n. R. parambula Cooper & Grant, lower Guadalupian, Word Formation, Glass Mountains, Hess Canyon, Texas, USA, $g-j$, holotype, dorsal, posterior, lateral, and anterior views, x1, k$, holotype, apical view, x3$, $l$, paratype, interior of dorsal valve, x2$, $m$, anterior of another paratype showing spines, x1.5, n$, paratype, interior of ventral valve, x2$ (Cooper & Grant, 1976b)., ——Fig. 840, 1o-s. R. sansabensis Carter, upper Kinderhookian-lower Osagian, Chappel Limestone, central Texas, USA, paratype, serial sections $1.0, 1.4, 2.0, 2.4, 3.2 \\mathrm{~mm}$ from posterior, x2$ (Carter, 1967).
Synonyms
Rhynchoporina
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Carboniferous (upper Tournaisian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Upper Permian (Tatarian)
Ending International Stage:
Wuchiapingian
Fraction Up In Ending Stage:
40
Ending Date:
257.43
Description
Outline transversely subpentagonal and profile dorsibiconvex. Beak straight to suberect, delthyrium oval, deltidial plates disjunct, rarely conjunct. Fold and sulcus becoming prominent anteriorly, tongue distinct, rectangular. Costae numerous, simple, rounded, from beaks, flattened and grooved anteriorly, intertroughs narrow, extending as sharp spines. Shell finely endopunctate. Dental plates short, thin, convergent ventrally, teeth cyrtomatodont. Dorsal median septum short, low, hinge plates united, septalium with cover plate that is often perforated posteriorly, inner socket ridges overhanging sockets, crural bases horizontal, crura ventrally curved, concave dorsomedially in section. Ventral and dorsal muscle fields poorly impressed. Small cardinal process occasionally present.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchoporoidea
Family:
Rhynchoporidae
Formal Genus Name and Reference:
Rhynchopora KING, 1865, p. 124
Type Species:
Terebratula geinitziana de VERNEUIL, 1845, p. 83, OD
Images
(Click to enlarge in a new window)
Fig. 840, 1a-f. * R. geinitziana (dE Verneuil), lower Kazanian, North Dvina River Basin, Shidrovo, northern European Russia, $a-b$, holotype, dorsal and lateral views, x1$ (de Verneuil, 1845), $c-e$, ventral, anterior, and lateral views, x2$, $f$, punctae on ground surface 10 mm from beak, x19$ (Erlanger, 1981)., ——Fig. 840, $1 \\mathrm{~g}-$ n. R. parambula Cooper & Grant, lower Guadalupian, Word Formation, Glass Mountains, Hess Canyon, Texas, USA, $g-j$, holotype, dorsal, posterior, lateral, and anterior views, x1, k$, holotype, apical view, x3$, $l$, paratype, interior of dorsal valve, x2$, $m$, anterior of another paratype showing spines, x1.5, n$, paratype, interior of ventral valve, x2$ (Cooper & Grant, 1976b)., ——Fig. 840, 1o-s. R. sansabensis Carter, upper Kinderhookian-lower Osagian, Chappel Limestone, central Texas, USA, paratype, serial sections $1.0, 1.4, 2.0, 2.4, 3.2 \\mathrm{~mm}$ from posterior, x2$ (Carter, 1967).
Synonyms
Rhynchoporina
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Carboniferous (upper Tournaisian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Upper Permian (Tatarian)
Ending International Stage:
Wuchiapingian
Fraction Up In Ending Stage:
40
Ending Date:
257.43
Description
Outline transversely subpentagonal and profile dorsibiconvex. Beak straight to suberect, delthyrium oval, deltidial plates disjunct, rarely conjunct. Fold and sulcus becoming prominent anteriorly, tongue distinct, rectangular. Costae numerous, simple, rounded, from beaks, flattened and grooved anteriorly, intertroughs narrow, extending as sharp spines. Shell finely endopunctate. Dental plates short, thin, convergent ventrally, teeth cyrtomatodont. Dorsal median septum short, low, hinge plates united, septalium with cover plate that is often perforated posteriorly, inner socket ridges overhanging sockets, crural bases horizontal, crura ventrally curved, concave dorsomedially in section. Ventral and dorsal muscle fields poorly impressed. Small cardinal process occasionally present.