1	Inner gonostylus with rod-like outgrowth behind anterior beak (Fig. 14G)	T. eleniya sp. nov.
–	Without such an outgrowth behind anterior beak on the inner gonostylus (Fig. 14F, I–K)	2
2	Wedge-shaped projection posteriorly on inner gonostylus (Fig. 14F)	T. caucasica Riedel, 1920
–	Without such a wedge-shaped projection posteriorly on inner gonostylus	3
3	Anterior (dorsal) margin of gonocoxite with sharp dentate projection in addition to smaller more ventral tooth (Fig. 14 I, J). Adminiculum and paired apical appendage of sternite 9 as in Figure 7K or 9K	4
–	Anterior (dorsal) margin of gonocoxite with only traces of a projection at most (Fig. 14K). Apical appendage of sternite 9 narrowed distally, bearing tassel of long golden setae (Fig. 11K, L)	T. talyshensis Savchenko, 1964
4	Tergite 9 at apex with four projections, central notch between middle projections small and shallow (dorsal view) (Fig. 14D). Paired appendage of sternite 8 with thick yellow setae on base covering space between. Setal arrangement on vertex as in Figure 13 D. Adminiculum and paired apical appendages of sternite 9 as in Figure 9K	T. quadridentata Savchenko, 1964
–	Tergite 9 at apex with only two projections, central notch between quite wide and deep (dorsal view) (Fig. 14C). Gap between paired appendage of sternite 8 usually exposed, not masked by setae. Arrangement of setae on vertex as in Figure 13C. Adminiculum and paired apical appendage of sternite 9 as in Figure 7K	T. paupera Savchenko, 1964