Key to Dominikon species

1. Larger, length of forewing: 27–30 mm; membrane usually less pigmented with brown, between Mp and CuA membrane transparent and no brown markings along distal part of R (Figs. 18a–d, 20b).............................. D. iranensis

- Smaller, length of forewing: 21–26 mm; membrane heavily pigmented with brown, between Mp and CuA with brown spots or a line.............................................................................................. 2

2. Membrane between Mp and CuA pale brown as well as along distal part of Rs1+Ma before pterostigma (Figs. 19a–d, 20c)............................................................................................. D. lagopus

- Membrane between Mp and CuA with brown line, no brown marks in distal part of Rs1+Ma before pterostigma (Figs. 16a–d, 20a).................................................................................. D. aspoecki sp. n.