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Aulosteges
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Aulostegoidea
Family:
Aulostegidae
Formal Genus Name and Reference:
Aulosteges von Helmersen, 1847, p. 330-331
Type Species:
A. wangenheimi de Verneuil, 1845, p. 194, OD, =A. variabilis von HELMERSEN, 1847, p. 330
Images
(Click to enlarge in a new window)
Fig. 418, 1a-d. *A. wangenheimi DE Verneuil, Kazanian, Orenburg, Russia, $a-c$, shell viewed ventrally, dorsally, laterally, $\\mathrm{X}_{1}$, $d$, incomplete dorsal valve interior, x1$ (Muir-Wood & Cooper, 1960)."
Synonyms
Geographic Distribution
northern Eurasia, ?Australia
Age Range
Beginning Stage in Treatise Usage:
Upper Permian (Kazanian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Upper Permian (Kazanian)
Ending International Stage:
Roadian
Fraction Up In Ending Stage:
100
Ending Date:
269.21
Description
Medium size, variable to long, may be asymmetric, ventral interarea with elongate to subtrigonal outline, total profile weakly concavoconvex with variably developed cicatrix, concentric ornament weak or absent, spines densely distributed on both valves, of two sizes ventrally, dorsal interior with rhomboidal pit separating cardinal process from median septum
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Aulostegoidea
Family:
Aulostegidae
Formal Genus Name and Reference:
Aulosteges von Helmersen, 1847, p. 330-331
Type Species:
A. wangenheimi de Verneuil, 1845, p. 194, OD, =A. variabilis von HELMERSEN, 1847, p. 330
Images
(Click to enlarge in a new window)
Fig. 418, 1a-d. *A. wangenheimi DE Verneuil, Kazanian, Orenburg, Russia, $a-c$, shell viewed ventrally, dorsally, laterally, $\\mathrm{X}_{1}$, $d$, incomplete dorsal valve interior, x1$ (Muir-Wood & Cooper, 1960)."
Synonyms
Geographic Distribution
northern Eurasia, ?Australia
Age Range
Beginning Stage in Treatise Usage:
Upper Permian (Kazanian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Upper Permian (Kazanian)
Ending International Stage:
Roadian
Fraction Up In Ending Stage:
100
Ending Date:
269.21
Description
Medium size, variable to long, may be asymmetric, ventral interarea with elongate to subtrigonal outline, total profile weakly concavoconvex with variably developed cicatrix, concentric ornament weak or absent, spines densely distributed on both valves, of two sizes ventrally, dorsal interior with rhomboidal pit separating cardinal process from median septum