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Spinomarginifera
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Productoidea
Family:
Productellidae
Formal Genus Name and Reference:
Spinomarginifera Huang, 1932, p. 16
Type Species:
S. kueichowensis, OD
Images
(Click to enlarge in a new window)
Fig. 289, 1a-f. *S. kueichowensis, Permian Coal Series, Guizhou, China, $a-c$, ventral, posterior, lateral views, $\\mathrm{X}_{1}, d$, ventral view with remnants of long spines, $X_{1}$, exfoliated dorsal valve interior, $X_{1}, f$, internal mold of dorsal valve, $X_{1}$ (Huang, 1932).
Synonyms
Rugosomarginifera, Haydenoides
Geographic Distribution
China, Japan, Afghanistan, Middle East
Age Range
Beginning Stage in Treatise Usage:
upper Lower Permian (upper Roadian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
50
Beginning Date:
271.79
Ending Stage in Treatise Usage:
Upper Permian (Changhsingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Small to medium, with a wide hinge, weakly concavoconvex with a long ventral trail anterior to geniculation, dorsal trail short, ribbing absent, but elongate spine bases, rugae irregular, narrow, spines commonly densely spaced, fine, but in some widely spaced anteriorly, dorsal valve with variably developed fine spines (the type species reported as lacking dorsal spines), marginal ridges strong in both valves, but ventrally incomplete anteriorly.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Productoidea
Family:
Productellidae
Formal Genus Name and Reference:
Spinomarginifera Huang, 1932, p. 16
Type Species:
S. kueichowensis, OD
Images
(Click to enlarge in a new window)
Fig. 289, 1a-f. *S. kueichowensis, Permian Coal Series, Guizhou, China, $a-c$, ventral, posterior, lateral views, $\\mathrm{X}_{1}, d$, ventral view with remnants of long spines, $X_{1}$, exfoliated dorsal valve interior, $X_{1}, f$, internal mold of dorsal valve, $X_{1}$ (Huang, 1932).
Synonyms
Rugosomarginifera, Haydenoides
Geographic Distribution
China, Japan, Afghanistan, Middle East
Age Range
Beginning Stage in Treatise Usage:
upper Lower Permian (upper Roadian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
50
Beginning Date:
271.79
Ending Stage in Treatise Usage:
Upper Permian (Changhsingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Small to medium, with a wide hinge, weakly concavoconvex with a long ventral trail anterior to geniculation, dorsal trail short, ribbing absent, but elongate spine bases, rugae irregular, narrow, spines commonly densely spaced, fine, but in some widely spaced anteriorly, dorsal valve with variably developed fine spines (the type species reported as lacking dorsal spines), marginal ridges strong in both valves, but ventrally incomplete anteriorly.