1.	Propodonotal region with 5 pairs of setae (vi absent)—Aulonastus	2
	Propodonotal region with 6 pairs of setae (vi present)	5
2.	Setae f2 twice as long as f1	Aulonastus fringillus
	Setae f2 3–4 times longer than f1	3
3.	Propodonotal shield punctate	Aulonastus loxius
	Propodonotal shield apunctate	4
4.	Setae c1 twice longer than d2	Aulonastus ritzerfeldi sp. n.
	Setae c1 1.2 times longer than d2	Aulonastus neotropicalis
5.	Leg setae dGII absent—Syringophiloidus	6
	Leg setae dGII present	10
6.	Medial branch of peritremes with 8 chambers	7
	Medial branch of peritremes with 2–3 chambers	8
7.	All propodonotal setae thick and enlarged basally. Hysteronotal shield punctate	Syringophiloidus serini
	All propodonotal setae thin and hair-like. Hysteronotal shield apunctate	Syringophiloidus carpodaci
8.	Setae d1 and e2 twice as long as d2	Syringophiloidus klimovi
	Setae d1, d2, and e2 subequal in length	9
9.	Lateral branch of peritreme with 8–9 chambers. Infracapitulum sparsely punctate. Length of stylophore 140–145 μm	Syringophiloidus coccothraustes
	Lateral branch of peritreme with 11–12 chambers. Infracapitulum densely punctate. Length of stylophore 170–195 μm	Syringophiloidus stawarczyki
10.	Aggenital setal series with more than 4 pairs—Torotrogla	11
	Aggenital setal series with 3 pairs	15
11.	Total body length 1360–1400 μm	Torotrogla coccothraustes
	Total body length less than 1100 μm	12
12.	Setae h1 distinctly longer than f1	13
	Setae f1 and h1 subequal in length	14
13.	Setae h1 210–295 μm long	Torotrogla gaudi
	Setae h1 445–495 μm long	Torotrogla enucleator sp. n.
14.	Propodonotal shield and coxal fields I–IV apunctate	Torotrogla janhafti sp. n.
	Propodonotal shield and coxal fields I–IV densely punctate	Torotrogla cardueli
15.	Apodemes I parallel and not fused to apodemes II—Aulobia	16
	Apodemes I divergent and fused to apodemes II—Syringophilopsis	18
16.	Each lateral branch of peritremes with 18–20 chambers	Aulobia cardueli
	Each lateral branch of peritremes with 10–13 chambers	17
17.	Hysteronotal shield absent	Aulobia ruppelae sp. n.
	Hysteronotal shield present	Aulobia leucostictus
18.	Hysteronotal shield absent	19
	Hysteronotal shield present	Syringophilopsis fringillae
19.	Setae si 315–355 μm long. Pygidial shield apunctate	Syringophilopsis euphonicus
	Setae si 195–220 μm long. Pygidial shield punctate	Syringophilopsis kirgizorum