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Leptostrophia
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Leptostrophiidae
Formal Genus Name and Reference:
Leptostrophia HALL & CLARKE , 1892, p. 288
Type Species:
Stropheodonta magnifica HALL, 1857, p. 54; OD
Images
(Click to enlarge in a new window)
Fig. 176, a–d. *L. (L.) magnifica (HALL), Oriskany Sandstone, Pragian; a, lectotype, internal mold of ventral valve, Schoharie County, New York, AMNH 34789, ×0.75; b, ventral interior, Cumberland, Maryland, AMNH 34794, × 1; c,d, internal mold, latex cast of dorsal valve, Schoharie County, New York, BMNH BC 13063, ×1 (new).——Fig. 176, e,f. L. (L.) magniventra (H ALL ), Oriskany Sandstone, Pragian, Schoharie, Schoharie County, New York; e, syntype, latex cast of mold of ventral valve, AMNH 34780, × 1; f, partly exfoliated dorsal valve, showing mold of cardinal process, AMNH 34782, ×1 (new).
Synonyms
Magniventra
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Semicircular outline; profile biplanate to gently concavoconvex; ornament usually unequally costellate; hinge line entirely denticulate; ventral valve with distinctive ventral process or tubular chamber; ventral muscle field with bounding ridges posterolaterally only, partitioned by low radial ridges; cardinal process lobes elongate to ponderous but separated at their base, ventrally to posteroventrally directed; socket plates small, situated posterolaterally, close to cardinal process lobes, often curved subparallel with lobes; dorsal musclebounding ridges may be present laterally, posteriorly; small central dorsal septum variably developed; dorsal subperipheral rim variably present.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Leptostrophiidae
Formal Genus Name and Reference:
Leptostrophia HALL & CLARKE , 1892, p. 288
Type Species:
Stropheodonta magnifica HALL, 1857, p. 54; OD
Images
(Click to enlarge in a new window)
Fig. 176, a–d. *L. (L.) magnifica (HALL), Oriskany Sandstone, Pragian; a, lectotype, internal mold of ventral valve, Schoharie County, New York, AMNH 34789, ×0.75; b, ventral interior, Cumberland, Maryland, AMNH 34794, × 1; c,d, internal mold, latex cast of dorsal valve, Schoharie County, New York, BMNH BC 13063, ×1 (new).——Fig. 176, e,f. L. (L.) magniventra (H ALL ), Oriskany Sandstone, Pragian, Schoharie, Schoharie County, New York; e, syntype, latex cast of mold of ventral valve, AMNH 34780, × 1; f, partly exfoliated dorsal valve, showing mold of cardinal process, AMNH 34782, ×1 (new).
Synonyms
Magniventra
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Semicircular outline; profile biplanate to gently concavoconvex; ornament usually unequally costellate; hinge line entirely denticulate; ventral valve with distinctive ventral process or tubular chamber; ventral muscle field with bounding ridges posterolaterally only, partitioned by low radial ridges; cardinal process lobes elongate to ponderous but separated at their base, ventrally to posteroventrally directed; socket plates small, situated posterolaterally, close to cardinal process lobes, often curved subparallel with lobes; dorsal musclebounding ridges may be present laterally, posteriorly; small central dorsal septum variably developed; dorsal subperipheral rim variably present.