A New Species of the Genus Plagiotropis (Bacillariophyta) from the River Burundeika (Tyumen oblast)

This light and scanning electron microscopy study investigates the valve morphology of a diatom of the genus Plagiotropis from the phytobenthos of the Burundeika (Tyumen oblast). The species is similar to P. lepidoptera var. proboscidea in the valve shape, quantitative characteristics and the raphe structure in internal view, but differs from this variety in the structure of the raphe in external view (the raphe fissure is not interrupted in the middle of the valve), the shape of areolae in internal view (round, but not oblong). Has shown that this is a new species to science—Plagiotropis incognitus sp. nov.