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Aksarinaia
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Obolidae
Formal Genus Name and Reference:
Aksarinaia KONEVA, 1992, p. 92
Type Species:
A. triquetra, OD
Images
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Fig. 13, 3a-f. *A*. triquetra, Amgaian, Kyrshabakty River, $a$, ventral valve exterior, x13.8$, $b$, lateral view, x16.7$, $c$, larval shell, RMS Br 136344, x50$, d, oblique view of ventral interior, RMS Br 136345, x75$, e, dorsal valve interior, x3 3 . 3, } f$, oblique view of dorsal interior, RMS Br 136347, X66.7 (new)."
Synonyms
Geographic Distribution
Kazakhstan (Malyi Karatau), Russia (eastern Siberia)
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Wuliuan
Fraction Up In Beginning Stage:
0
Beginning Date:
509
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
100
Ending Date:
497
Description
Shell subtriangular, flatly biconvex, pseudointerareas of both valves with flexure lines, ventral pseudointerarea orthocline with deep, subtriangular pedicle groove and strongly raised, narrow propareas, dorsal pseudointerarea moderately high, with broad median groove and narrow, elevated propareas, dorsal visceral area slightly thickened, extending anterior to midvalve, dorsal vascula media marginal, arcuate. Middle Cambrian: Kazakhstan (Malyi Karatau), Russia (eastern Siberia).