Svalbardia from Givetian of Central Russia (Voronezh Region): leaf morphology and spores from sporangium

Abstract

The new combination Svalbardia furcihasta (Krassilov et al.) Jurina, comb. nov. from Givetian of Voronezh region of Central Russia is described. Micro–and megaspores isolated from the sporangia of this plant, along with the taxa of dispersed miospores are discussed. The characters which are important for species diagnosis of the genus Svalbardia are discussed and the stratigraphic position of certain species of Svalbardia is clarified.