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Mesoleptostrophia
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Leptostrophiidae
Formal Genus Name and Reference:
Mesoleptostrophia Harper & BOUCOT, 1978, p. 68
Type Species:
M. kartalensis, OD, nom. nov. pro Stropheodonta (Leptostrophia) explanata Paeckelmann & Sieverts, 1932, non SOWERBY, 1842 in 1840-1846, p. 40, Kartal-schichten (Emsian), Turkey
Images
(Click to enlarge in a new window)
Fig. 182, 2d,e. M. (M.) explanata SOWERBY, Coblenzian, Emsian; d, internal mold of ventral valve, Daun, BMNH B 42798, ×1; e, internal mold of dorsal valve, Grünbach, Germany, BMNH B 24570, ×1 (new).
Synonyms
Leptostrophiella, Mitchellella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (Telychian)
Beginning International Stage:
Telychian
Fraction Up In Beginning Stage:
0
Beginning Date:
438.59
Ending Stage in Treatise Usage:
Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Outline semicircular to subquadrate, profile biplanate to gently concavoconvex, ornament unequally parvicostellate to uniformly costellate, denticulate over most of valve width, small ventral process present, subtriangular to bilobed ventral muscle field with bounding ridges variably developed posterolaterally, variable, usually small, cardinal process lobes
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Leptostrophiidae
Formal Genus Name and Reference:
Mesoleptostrophia Harper & BOUCOT, 1978, p. 68
Type Species:
M. kartalensis, OD, nom. nov. pro Stropheodonta (Leptostrophia) explanata Paeckelmann & Sieverts, 1932, non SOWERBY, 1842 in 1840-1846, p. 40, Kartal-schichten (Emsian), Turkey
Images
(Click to enlarge in a new window)
Fig. 182, 2d,e. M. (M.) explanata SOWERBY, Coblenzian, Emsian; d, internal mold of ventral valve, Daun, BMNH B 42798, ×1; e, internal mold of dorsal valve, Grünbach, Germany, BMNH B 24570, ×1 (new).
Synonyms
Leptostrophiella, Mitchellella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (Telychian)
Beginning International Stage:
Telychian
Fraction Up In Beginning Stage:
0
Beginning Date:
438.59
Ending Stage in Treatise Usage:
Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Outline semicircular to subquadrate, profile biplanate to gently concavoconvex, ornament unequally parvicostellate to uniformly costellate, denticulate over most of valve width, small ventral process present, subtriangular to bilobed ventral muscle field with bounding ridges variably developed posterolaterally, variable, usually small, cardinal process lobes