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Platystrophia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Plectorthoidea
Family:
Playstrophiidae
Formal Genus Name and Reference:
Platystrophia KING, 1850, p. 106
Type Species:
Terebratulites biforatus von SCHLOTHEIM, 1820, p. 265, OD
Images
(Click to enlarge in a new window)
Fig. 561, 1a. * P. biforata, Caradoc, Cincinnati, dorsal exterior, x2$ (Cocks, new)., ——Fig. 561, 1b-e. P. ponderosa Foerste, Ashgill, eastern North America, ventral, dorsal, posterior, anterior views of conjoined valves, X1 (Shimer & Shrock, 1944)., ——Fig. 561, 1f, g. P. laticosta (Meek), Ashgill, Ohio, $f$, ventral interior, X1.5, g, dorsal interior, X1.5 (Schuchert & Cooper, 1932).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Arenig)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
middle Silurian (Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Normally large, spiriferoid in outline with acute to mucronate cardinal extremities, strongly biconvex, costate and finely granulose, variably lamellose, ventral beak commonly resorbed with apical foramen, posterior pair of quadripartite dorsal adductor scars larger than anterior pair, ventral mantle canal system digitate.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Plectorthoidea
Family:
Playstrophiidae
Formal Genus Name and Reference:
Platystrophia KING, 1850, p. 106
Type Species:
Terebratulites biforatus von SCHLOTHEIM, 1820, p. 265, OD
Images
(Click to enlarge in a new window)
Fig. 561, 1a. * P. biforata, Caradoc, Cincinnati, dorsal exterior, x2$ (Cocks, new)., ——Fig. 561, 1b-e. P. ponderosa Foerste, Ashgill, eastern North America, ventral, dorsal, posterior, anterior views of conjoined valves, X1 (Shimer & Shrock, 1944)., ——Fig. 561, 1f, g. P. laticosta (Meek), Ashgill, Ohio, $f$, ventral interior, X1.5, g, dorsal interior, X1.5 (Schuchert & Cooper, 1932).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Arenig)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
middle Silurian (Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Normally large, spiriferoid in outline with acute to mucronate cardinal extremities, strongly biconvex, costate and finely granulose, variably lamellose, ventral beak commonly resorbed with apical foramen, posterior pair of quadripartite dorsal adductor scars larger than anterior pair, ventral mantle canal system digitate.