New data on the Eocene Radiolaria of the North Caucasus-Mangyshlak petroleum province
A complex of Radiolaria of zones <i>Cyrtophormis (?) Alta </i>and <i>Ethomosphaera (?) Polysiphonia</i>, which includes about 50 species belonging to 18 genera and 11 families has been identified in the Eocene sediments, Kuma formation of the North Caucasus-Mangyshlak petroleum province. A new type of <i>Hexacontium donicum </i>Sarkisova, sp. nov. Radiolaria of these units were found together with planktonic Foraminifera.