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Strophonella
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Strophonellidae
Formal Genus Name and Reference:
Strophonella HALL, 1879, p. 153
Type Species:
Strophomena semifasciata HALL, 1863b, p. 210, OD
Images
(Click to enlarge in a new window)
Fig. 193, 2b–e. S. (S.) punctulifera (CONRAD), Lochkovian; b,c, dorsal, lateral views of partly exfoliated dorsal valve, lowe rHelderberg Group, Port Colburn, Ontario, Canada, AMNH 33070, ×1; d, internal mold of ventral valve, lower Helderberg Group, Schoharie, New York, BMNH B 9290, × 1; e, dorsal interior, BMNH B 74973, ×1 (new).
Synonyms
Costistrophonella, Strophoprion
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (Wenlock)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Ornament variably costellate, hinge line denticulate over most of valve width, no dental plates, ventral muscle field subquadrate, usually with well-developed muscle-bounding ridges except anteriorly at valve center, cardinal process lobes short, swollen, directed posteroventrally, dorsal muscle field weakly impressed
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Strophonellidae
Formal Genus Name and Reference:
Strophonella HALL, 1879, p. 153
Type Species:
Strophomena semifasciata HALL, 1863b, p. 210, OD
Images
(Click to enlarge in a new window)
Fig. 193, 2b–e. S. (S.) punctulifera (CONRAD), Lochkovian; b,c, dorsal, lateral views of partly exfoliated dorsal valve, lowe rHelderberg Group, Port Colburn, Ontario, Canada, AMNH 33070, ×1; d, internal mold of ventral valve, lower Helderberg Group, Schoharie, New York, BMNH B 9290, × 1; e, dorsal interior, BMNH B 74973, ×1 (new).
Synonyms
Costistrophonella, Strophoprion
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (Wenlock)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Ornament variably costellate, hinge line denticulate over most of valve width, no dental plates, ventral muscle field subquadrate, usually with well-developed muscle-bounding ridges except anteriorly at valve center, cardinal process lobes short, swollen, directed posteroventrally, dorsal muscle field weakly impressed