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Cleiothyridina
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Athyridida
Suborder:
Athyrididina
Superfamily:
Athyridoidea
Family:
Athyrididae
Subfamily:
Cleiothyridininae
Formal Genus Name and Reference:
Cleiothyridina BUCKMAN, 1906, p. 324
Type Species:
Atrypa pectinifera J. de C. Sowerby, 1840 in 1840-1846, p. 14, validated by ICZN Opinion 1041, 1976, p. 210
Images
(Click to enlarge in a new window)
Fig. 1023a-e. * C. pectinifera (Sowerby), Kazanian, ?Tatarian, Durham, United Kingdom, a- d, lectotype, dorsal, ventral, lateral, and posterior views, BMNH B61055, Sowerby Collection, x2 (Brunton, 1980, photographs courtesy of C. H. C. Brunton), e, jugum, approximately x4.5 (Davidson, 1857)., Fig. 1023 f-g. C. seriata Grant, Artinskian, southern Thailand, f, cardinalia, USNM 497424, X16.5, g, anterior view into articulated umbones showing cardinalia and articulation, USNM 497425, x14 (new).
Synonyms
Cliothyris, Cleiothyridellina, Gerankalasiella, Kjarkiella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian (Famennian)
Beginning International Stage:
Famennian
Fraction Up In Beginning Stage:
0
Beginning Date:
371.1
Ending Stage in Treatise Usage:
Upper Permian (Kazanian, ?Tatarian)
Ending International Stage:
Wuchiapingian
Fraction Up In Ending Stage:
40
Ending Date:
257.43
Description
Medium-sized, transversely elliptical to longitudinally ovate, subequally biconvex shells. [Cleiothyridellina, from the Upper Permian of Nepal, is said to differ by having swollen shells, flat cardinal plate, and very short and low median septum, usually absent at maturity; Gerankalasiella and Kjarkiella from the Tournaisian of Transcaucasia are said to differ by having wider growth lamellae and spiral brachidium having a higher number of whorls (Gerankalasiella), while Kjarkiella has a larger size, high shell convexity, and very dense, narrow growth lamellae, weakly divided at margins.]
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Athyridida
Suborder:
Athyrididina
Superfamily:
Athyridoidea
Family:
Athyrididae
Subfamily:
Cleiothyridininae
Formal Genus Name and Reference:
Cleiothyridina BUCKMAN, 1906, p. 324
Type Species:
Atrypa pectinifera J. de C. Sowerby, 1840 in 1840-1846, p. 14, validated by ICZN Opinion 1041, 1976, p. 210
Images
(Click to enlarge in a new window)
Fig. 1023a-e. * C. pectinifera (Sowerby), Kazanian, ?Tatarian, Durham, United Kingdom, a- d, lectotype, dorsal, ventral, lateral, and posterior views, BMNH B61055, Sowerby Collection, x2 (Brunton, 1980, photographs courtesy of C. H. C. Brunton), e, jugum, approximately x4.5 (Davidson, 1857)., Fig. 1023 f-g. C. seriata Grant, Artinskian, southern Thailand, f, cardinalia, USNM 497424, X16.5, g, anterior view into articulated umbones showing cardinalia and articulation, USNM 497425, x14 (new).
Synonyms
Cliothyris, Cleiothyridellina, Gerankalasiella, Kjarkiella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian (Famennian)
Beginning International Stage:
Famennian
Fraction Up In Beginning Stage:
0
Beginning Date:
371.1
Ending Stage in Treatise Usage:
Upper Permian (Kazanian, ?Tatarian)
Ending International Stage:
Wuchiapingian
Fraction Up In Ending Stage:
40
Ending Date:
257.43
Description
Medium-sized, transversely elliptical to longitudinally ovate, subequally biconvex shells. [Cleiothyridellina, from the Upper Permian of Nepal, is said to differ by having swollen shells, flat cardinal plate, and very short and low median septum, usually absent at maturity; Gerankalasiella and Kjarkiella from the Tournaisian of Transcaucasia are said to differ by having wider growth lamellae and spiral brachidium having a higher number of whorls (Gerankalasiella), while Kjarkiella has a larger size, high shell convexity, and very dense, narrow growth lamellae, weakly divided at margins.]