East European Platform Russia
Geological Time: Carboniferous Mississippian
the drawings are published in the book cited below
View of a specimen of Spirillina sp. ---
length about 640µm
cross section
The identification is based upon:
Mjatliuk. E.V., 1953: Fossil foraminifera of the USSR. Spirillinidae, Rotalliidae, Epistominidae and Asterinidae. V.N.I.G.R.I. 11 271 pp. Plate 1-1, Fig. 2
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