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Jakutoproductus
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Productoidea
Family:
Productellidae
Formal Genus Name and Reference:
Jakutoproductus KASCHIRTZEV, 1959, p. 28
Type Species:
Marginifera verchoyanica FREDERICKS, 1931, p. 211, OD
Images
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Fig. 300, 1 a-e. *J. verchoyanica (Fredericks), ?Sakmarian-Artinskian, northeastern Russia, Verkhoyan, $a, b$, lectotype, abraded ventral valve\nLanipustula Klets, 1983, p. 7571 *Pustula baicalensis Maslennikov, 1960, p. 341, OD. Similar to Levipustula, but with dense dorsal spines, cardinal ridges, buttress plates. Lower Carboniferous (?upper Viséan)-upper Upper Carboniferous: Russia, Transbaikal, Mongolia.--Fig. 300, 2a-d. $* L$. baicalensis (Maslennikov), Upper Carboniferous, Transbaikalia, $a$, neotype, ventral valve exterior, PIN $3979 / 1, \\times 1, b$, ventral valve internal cast, x2, c$, dorsal valve external mold, $X_{3}$, $d$, dorsal valve internal cast, x3$ (Klets, 1983)."
Synonyms
Geographic Distribution
northern Canada, Siberia, Mongolia, northern Asia
Age Range
Beginning Stage in Treatise Usage:
Lower Permian (Asselian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Lower Permian (Kungurian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
"Medium size, transverse, with well-differentiated ears, ventral disk weakly convex, dorsal disk almost flat, rugae irregular on corpus of both valves, commonly undulose, spine bases scattered ventrally, elongate posteriorly, rounded and concentrically arranged on trail, cardinal process pit separates median septum, lateral ridges in both valves, dorsally continuous as weak marginal ridge."