1	Opisthomere of gonopod with a rod (Fig. 3D, F, G, I)	(genus Amblyiulus) 2
–	Opisthomere of gonopod without rod	(genus Syrioiulus) 3
2	Head without frontal setae, collum and metazonae of body rings without setae (Fig. 2A–C). Promere relatively wide, with two apical denticles (Fig. 3B, E)	A. georgicus
–	Head with 1+1 frontal setae, collum and metazonae of body rings with whorls of setae at caudal margin (Fig. 4A–C). Promere narrow, without apical denticles (Fig. 5B, H)	A. hirtus sp. nov.
3	Eyes present	4
–	Eyes absent	5
4	Larger: width > 2.0 mm. Eyes well-developed, black, oval, each composed of 19–23 ommatidia (Fig. 9A)	S. continentalis
–	Smaller: width < 1.3 mm. Eyes present, but very small and unpigmented, each composed of 3–7 ommatidia (Fig. 6B)	S. adsharicus
5	Head without frontal setae (Fig. 11A–C)	S. taliscius
–	Head with 1+1 frontal setae (Fig. 13A–C)	S. armeniacus sp. nov.