Key to the species of Sarothrogammarus -group from the Pamir region

1. Pereopod IV with filtrative setae................................................ Comatogammarus ferghanensis

- Pereopod IV with no filtrative setae...................................................................... 2

2. Second article of outer ramus in uropod III vestigial.......................................................... 3

- Second article of outer ramus in uropod III distinct........................................................... 4

3. Outer ramus of uropod III slender........................................................ Barnardiorum ruffoi

- Outer ramus of uropod III extended..................................................... Barnardiorum shadini

4. Eyes absent..................................................................... Sarothrogammarus yiiruae

- Eyes present......................................................................................... 5

5. Antenna I peduncle with long setae on ventral margin.................................. Sarothrogammarus trichiatus

- Antenna I peduncle with short setae on ventral margin........................................................ 6

6. Antenna I accessory flagellum with two segments........................................................... 7

- Antenna I accessory flagellum with three or four segments.................................................... 8

7. Gnathopod II palm very oblique.................................................. Sarothrogammarus afghanus

- Gnathopod II palm not oblique.................................................... Sarothrogammarus asiaticus

8. Pereopod III with filtrative setae......................................................................... 9

- Pereopod III with no filtrative setae...................................................................... 10

9. Male pereopod III with filtrative setae on merus, carpus and propodus.......... Sarothrogammarus miandamensis sp. nov.

- Male pereopod III with filtrative setae on merus, but few on carpus and propodus... Sarothrogammarus kalamensis sp. nov.

10. Both male and female pereopod III with rows of long setae.......................... Sarothrogammarus multipennatus

- Female pereopod III without long setae............................................ Sarothrogammarus lindbergi