Colchiobrachyiulus montanus sp. nov., paratypes (ZMUM) A–C ♂ from near Arkhyz, Russia A left flange of pleurotergum 7, ventro-lateral view B penis, caudal view C right gonopods, oral view D–H ♂ from Mount Mussa-Achitara, Russia D right promere, caudal view E distal part of left opisthomere, mesal-oral view F right opisthomere, caudal view G apical part of left opisthomere, with the flagellum remained in its channel, oral view H branches of apical outgrowth of basoposterior process I ♀ from Mount Mussa-Achitara, Russia left vulva, caudal view. Scale bars: 0.2 mm (A–C, I), 0.1 mm (D, F), 0.05 mm (E, G), 0.01 mm (H). Abbreviations: ap anterior process, ao apical outgrowth, bpp basoposterior process, ct central tube, dmg distomesal groove, dmp distomesal process, f flagellum, fc flagellum channel, hp hyaline protrusions, mg median groove, mr median ridge, p promere, pa posterior ampulla, pt posterior tube, s solenomere, sf spiniform filaments.