Distribution of the genera Brachyiulus (purple), Cyphobrachyiulus (green), Colchiobrachyiulus (black), Iraniulus (blue) Megaphyllum (brown), and Svaniulus (red) in the Caucasus: Brachyiulus jawlowskii (open square), B. lusitanus (ring), Cyphobrachyiulus (Diaxylus) litoreus (drop), C. (Grusiniulus) redikorzevi comb. nov. (star), Colchiobrachyiulus dioscoriadis comb. nov. (cross), C. montanus sp. nov. (diamond), I. tricornis sp. nov. (triangle pointing down), Megaphyllum hercules (pentagon), M. spathulatum (filled circle), S. ryvkini gen. nov., sp. nov. (filled square), and S. waltheri gen. nov., sp. nov. (triangle pointing up); solid line representing the approximate south border of the distribution range of Byzantorhopalum rossicum rossicum.