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Delthyris
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Delthyris DALMAN, 1828, p. 99
Type Species:
*D. elevata Dalman, 1828, p. 120, SD SCHUCHERT, 1897, p. 206
Images
(Click to enlarge in a new window)
Fig. 1210, 1a-d. *D. (D.) elevata, Wenlock, Gotland, holotype, dorsal, ventral, lateral, and anterior views, X2 (Bassett & Cocks, 1974).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (?upper Llandovery, Wenlock)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Medium to large, ventribiconvex, equidimensional or transverse, ventral interarea apsacline, fold and sulcus smooth, flanks with few strong, simple plications, growth lamellae closely spaced, dental plates long, thin, subparallel to ventral median septum, crural plates present. Silurian (?upper Llandovery, Wenlock)-Middle Devonian (Eifelian). D. (Delthyris). Medium size, equidimensional or transverse, ventral interarea curved. Silurian (?upper Llandovery, Wenlock)-Middle Devonian (Eifelian): cosmopolitan.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Delthyris DALMAN, 1828, p. 99
Type Species:
*D. elevata Dalman, 1828, p. 120, SD SCHUCHERT, 1897, p. 206
Images
(Click to enlarge in a new window)
Fig. 1210, 1a-d. *D. (D.) elevata, Wenlock, Gotland, holotype, dorsal, ventral, lateral, and anterior views, X2 (Bassett & Cocks, 1974).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (?upper Llandovery, Wenlock)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Medium to large, ventribiconvex, equidimensional or transverse, ventral interarea apsacline, fold and sulcus smooth, flanks with few strong, simple plications, growth lamellae closely spaced, dental plates long, thin, subparallel to ventral median septum, crural plates present. Silurian (?upper Llandovery, Wenlock)-Middle Devonian (Eifelian). D. (Delthyris). Medium size, equidimensional or transverse, ventral interarea curved. Silurian (?upper Llandovery, Wenlock)-Middle Devonian (Eifelian): cosmopolitan.