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Spinocyrtia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Cyrtospiriferoidea
Family:
Spinocyrtiidae
Formal Genus Name and Reference:
Spinocyrtia FREDERIKS, 1916, p. 18
Type Species:
Delthyris granulosa Conrad, 1839, p. 65, SD FREDERIKS, 1926, p. 411
Images
(Click to enlarge in a new window)
Fig. 1129, 1a-d. * S. granulosa (Conrad), Givetian, New York, USA, dorsal, ventral, anterior, and lateral views, X1 (Ehlers & Wright, 1955).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Medium to large, biconvex, transverse, ventral interarea flat or slightly curved, apsacline, stegidial plates present, cardinal angles acute, auriculate, fold and sulcus prominent, smooth, with plications tending to form on parietal slopes anteriorly, fold may have median groove, flanks with numerous low, rounded plications separated by narrow interspaces, surface tuberculate, with radially arranged, tear-shaped granules on microfila, dental plates straight, divergent, mostly buried in umbonal callus with impressed muscle field, broad ctenophoridium impressed in thick shell.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Cyrtospiriferoidea
Family:
Spinocyrtiidae
Formal Genus Name and Reference:
Spinocyrtia FREDERIKS, 1916, p. 18
Type Species:
Delthyris granulosa Conrad, 1839, p. 65, SD FREDERIKS, 1926, p. 411
Images
(Click to enlarge in a new window)
Fig. 1129, 1a-d. * S. granulosa (Conrad), Givetian, New York, USA, dorsal, ventral, anterior, and lateral views, X1 (Ehlers & Wright, 1955).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Medium to large, biconvex, transverse, ventral interarea flat or slightly curved, apsacline, stegidial plates present, cardinal angles acute, auriculate, fold and sulcus prominent, smooth, with plications tending to form on parietal slopes anteriorly, fold may have median groove, flanks with numerous low, rounded plications separated by narrow interspaces, surface tuberculate, with radially arranged, tear-shaped granules on microfila, dental plates straight, divergent, mostly buried in umbonal callus with impressed muscle field, broad ctenophoridium impressed in thick shell.