The problem of genetic interpretation problematic Calcisphaera inсertae sedis (for example of Uper Devonian deposits of the Timan-Pechora Region)
A comprehensive study of the Upper Devonian problematic Calcisphaera was conducted. They were divided into three morphotypes, to which radiolarians, sponges, acritarchs, possible foraminifers, charophytes and green algae can be related. Main elements of Calcisphaera structure were revealed, which may be a basis for genetic classification of various groups of organisms.