Arrhopalitidae Stach 1956

Key to genera of the Caucasian Arrhopalitidae Stach, 1956 1 Seta FSa on tibiotarsi I and II present; dens with 3, 2, 1, 1 anterior setae; tenaculum with two setae; Ant II with 15 setae; prefurcal area of the great abdomen with 9 setae; trichobothria ABC form a very obtuse angle, with AB <BC................................................................................... Pygmarrhopalites Vargovitsh, 2009 - Seta FSa on tibiotarsi I and II absent; dens with 3, 2, 1, 1, 1 anterior setae; tenaculum with one seta; Ant II with 14 setae; prefurcal area with 8 setae; trichobothria ABC alignment otherwise............................................. 2 2 Trichobothria ABC form an approximately right angle, with AB> BC; dorsal valve of the female Abd VI with 10–11 + 2 axial setae per side; Ant IV with up to 7 subsegments.... Arrhopalites Börner, 1906 (caecus -group s. str. sensu Vargovitsh 2013) - Trichobothria ABC align in one line, with AB subequal to BC; dorsal valve of the female Abd VI with 7 + 2 axial setae per side; Ant IV with 13 subsegments........ Troglopalites Vargovitsh, 2012, one species: T. stygios Vargovitsh, 2012 (troglobiont)