A new bryozoan species Dianulites altaicus sp. nov. (order Esthonioporata) are described from the Sandbian, the Upper Ordovician, of the Teletskoe Lakeside in Gorny Altai. The bryozoan collection of the genus Dianulites Eichwald, 1829 from the Lower and Middle Ordovician of the Novaya Zemlya archipelago and Vaygach Island, Russian Arctic, is revised. The bryozoan species, recently identified as D. janischevskyi Modzalevskaya, 1953 from the Lower and Middle Ordovician of the Novaya Zemlya archipelago, is shown to belong to the species Dianulites altaicus sp. nov. There were two groups of species of the genus Dianulites in the Ordovician of the Russian Arctic; the first group of species had mesozooecia, the second group of species, to which the new species belongs, had no mesozooecia, but some of them had minutopores.
