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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

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Fossil Image
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

Schuchert & Cooper, 1932, Schuchert & Cooper, 1932