1	Antennomere II distinctly longer than antennomere III	Anexodus Pascoe, 1886
–	Antennomere II shorter than antennomere III	2
2	Body slender, narrow, parallel-sided; BL/BW = 3.5; tibial spurs 1-1-2; elytral apex truncate; elytral tubercles only at apical half (females unknown)	Pantilema Aurivillius
–	Body more robust, mostly broadly oval; BL/BW = 2.4–3.1; tibial spurs 0-0-2 or 2-2-2; elytral apex rounded; elytral tubercles distributed along whole elytral length and/or forming distinct ridges	3
3	Antennomere III shorter than antennomere XI; antennomere II 0.4–0.7 times as long as antennomere III; antennomere III 1.7–2.4 times longer than wide	4
–	Antennomere III longer than antennomere XI; antennomere II 0.2–0.3 times as long as antennomere III; antennomere III 3.2–4.1 times longer than wide	6
4	Body larger (BL 14.3 mm); genae parallel-sided at frontal view (Fig. 43); surface of scape smooth; elytra with distinct ridges without individual tubercles (Fig. 40); outer margin straight at lateral view (Fig. 41)	(Eurystyrax gen. n.) Eurystyrax nemethi sp. n.
–	Body smaller (BL 9.0–10.5 mm); genae convex at frontal view (Figs 30, 36); surface of scape slightly distorted; elytra with rows of individual tubercles (Figs 27, 34); outer margin curved at lateral view (Figs 28, 35)	(Microdolichostyrax gen. n.) 5
5	Body pubescence darker, chestnut brown; antennomere II 0.7 times as long as antennomere III; spermatheca with apex rounded; sclerotized part of spermathecal duct very long, strongly coiled (Fig. 33)	Microdolichostyrax hefferni sp. n.
–	Body pubescence paler, yellowish brown; antennomere II 0.5 times as long as antennomere III; spermatheca with apex tapered; sclerotized part of spermathecal duct short, curved (Fig. 39)	Microdolichostyrax minutus sp. n.
6	Mandibular apex bidentate (Fig. 52); elytra with tubercles forming distinct ridges (Figs 48, 60); tibial spurs 0-0-2 in male; protibiae and mesotibiae apically with distinct protrusions in male (Fig. 54); terminal maxillary and labial palpomeres widened, flattened and truncate in male (Fig. 53); metatarsomere III 0.8–1.0 times as long as metatarsomere I	(Borneostyrax gen. n.) Borneostyrax cristatus sp. n.
–	Mandibular apex unidentate (Fig. 6); elytra with rows of individual tubercles (Figs 1, 13); tibial spurs 2-2-2 in male; protibiae and mesotibiae apically without distinct protrusions in male; terminal maxillary and labial palpomeres fusiform in male (Fig. 7); metatarsomere III 1.2–1.5 times as long as metatarsomere I	(Dolichostyrax Aurivillius) 7
7	Apex of scape thickened moderately (Fig. 5); tegmen basally without distinct strut; parameres with sparse long setae at apex only (Fig. 11)	Dolichostyrax moultoni Aurivillius
–	Apex of scape thickened substantially, forming distinct bulge (Figs 16, 24); tegmen basally with short strut; parameres with dense long setae at apical half (Fig. 19)	Dolichostyrax longipes Aurivillius