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Levenea
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Levenea Schuchert & COOPER, 1931, p. 246
Type Species:
Orthis subcarinata HALL, 1857, p. 43, OD
Images
(Click to enlarge in a new window)
Fig. 571, 4a-c. *L. subcarinata (HALL), Lochkovian, Tennessee, $a$, ventral interior, x1.5, b$, dorsal interior, x1 . 5, ~} c$, enlargement of posterior region, x3 . 5}$ (Schuchert & Cooper, 1932), Fig. 571, 4d-f. L. sp. cf. L. subcarinata, Lochkovian, Tennessee, ventral, dorsal, posterior views of conjoined valves, X1.5 (Schuchert & Cooper, 1932)
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
lower Silurian (Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Subcircular, ventribiconvex valves, ventral interior with short subpentagonal muscle field bisected by wide median ridge, dorsal interior with swollen, lobate myophore lacking well-developed shaft and brachiophores expanded medianly, deep sockets excavated into valve floor, fulcral plates rare. lower Silurian (Llandovery)Middle Devonian (Eifelian): cosmopolitan.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Levenea Schuchert & COOPER, 1931, p. 246
Type Species:
Orthis subcarinata HALL, 1857, p. 43, OD
Images
(Click to enlarge in a new window)
Fig. 571, 4a-c. *L. subcarinata (HALL), Lochkovian, Tennessee, $a$, ventral interior, x1.5, b$, dorsal interior, x1 . 5, ~} c$, enlargement of posterior region, x3 . 5}$ (Schuchert & Cooper, 1932), Fig. 571, 4d-f. L. sp. cf. L. subcarinata, Lochkovian, Tennessee, ventral, dorsal, posterior views of conjoined valves, X1.5 (Schuchert & Cooper, 1932)
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
lower Silurian (Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Subcircular, ventribiconvex valves, ventral interior with short subpentagonal muscle field bisected by wide median ridge, dorsal interior with swollen, lobate myophore lacking well-developed shaft and brachiophores expanded medianly, deep sockets excavated into valve floor, fulcral plates rare. lower Silurian (Llandovery)Middle Devonian (Eifelian): cosmopolitan.