Key to females of the described species of Gonatocerus (Gahanopsis)

1 Funicle 7-segmented .................................................................................................................................................... 2

- Funicle 8-segmented .................................................................................................................................................... 3

2(1) F3 and F5 each with 3 mps and more or less subequal to F2, F4, F6, or F7 (Fig. 163) ................................................. .............................................................................................................. G. (Gahanopsis) deficiens (Ogloblin) comb. n.

- F3 and F5 without mps and much shorter than F2, F4, F6, or F7 (Fig. 158).................................................................. ..................................................................................................................... G. (Gahanopsis) arkadak Triapitsyn sp. n.

3(1) Forewing disc densely setose between marginal vein and cubital row of setae (Fig. 153); F3 usually with at least one mps; longest marginal seta a little more than 0.14x maximum wing width .... G. (Gahanopsis) aethalionis (Ogloblin)

- Forewing disc with at least a small bare area between marginal vein and cubital row of setae; F3 without mps; longest marginal seta at least 0.3x maximum wing width ................................................................................................ 4

4(3) F4 without mps; clava about as long as combined length of F6–F8 ............ G. (Gahanopsis) acanophorae (Ogloblin)

- F4 with 1 or 2 mps; clava about as long as combined length of F7 and F8 ............. G. (Gahanopsis) pusilus Ogloblin