Species of the Genus Geissleria (Bacillariophyta) in Russia: Morphology, Taxonomy, and Distribution

Resumo

Materials from waterbodies and watercourses in West and East Siberia have been studied, new data on morphology of some representatives of the genus Geissleria have been obtained, and the systematic position of some species and forms of the genus Geissleria reported in the literature as species has been specified. The number of areolae in 10 µm and marginal structures are used as differential features. Findings of some representatives of the genus Geissleria (G. acceptata, G. declivis, G. decussis, G. mongolica, and G. thingvallae) in the studied water bodies in Russia make it possible to broaden our knowledge of their ranges. The following species that are new for science are described: G. davydovae sp. nov., G. moiseevae sp. nov., G. bondarenkae sp. nov., and G. gollerbakhii sp. nov.