The supplementary description of Liacarus neonominatus Subías, 2004 (Oribatida, Liacaridae) is presented, based on the material collected from soil and sand in a shrub-lichen tundra, Yamal Peninsula, Western Siberia, Russia. The main morphological traits of this species are summarized. The taxonomic status of some liacarid genera related with Liacarus is discussed, resulting in the following taxonomic proposals: Liacarus Michael, 1898 (= Dorycranosus Woolley, 1969 syn. nov., = Procorynetes Woolley, 1969 syn. nov., = Rhaphidosus Woolley, 1969 syn. nov.).