Cadoderus

Yunakov, Nikolai, 2012, 3535, Zootaxa 3535, pp. 1-104 : 7

Key to Embrithini genera allied to Cadoderus (modified after Marshall 1942)

1 Epistome U-shaped, its posterior margin forming arcuate carina; frons not declivous or weakly declivous; subocular row consisting of 2–3 (rarely 4–6) setae; pronotum without anterior transverse setal fringe; ventrites densely squamose; antennifer entirely visible in dorsal view; pronotum strongly transverse [PL/PW: 0.71–0.89]; aggonoporium of internal sac with ventral process, if ventral process absent then lobes curved.......................................................... 2

- Epistome very narrow, linear, without carina; frons vertical, linear; subocular row consists of 5–8 (rarely 2) setae; pronotum with (rarely without) anterior setal fringe; ventrites with scattered scales and short hairs; antennifers half-visible; funicular segment 1 more or less longer than 2; pronotum transverse or as long as wide [PL/PW: 0.81–1]; aggonoporium of internal sac consisting of two stick-shaped lobes connected proximally by transverse bridge, without ventral process...................................................................................................... Sphrigodellus Marshall

2 Eyes weakly convex, not surrounded by wide glabrous ring; transverse sulcus not concealed by scales; Internal sac with aggonoporium long, consisting of straight lobes; subscutellar callosity weakly developed............ Cadoderus Marshall

- Eyes flat, surrounded by wide glabrous ring; transverse sulcus completely concealed by scales; subscutellar callosity strongly developed........................................................................................... 3

3 Metanepisternal suture complete; anterior portion of epifrons roundly dilated; rostrum and vertex covered with dense matted curled, erect setae.................................... Plocometopus Marshall [ P. scutellatus (Hustache) 4–4.5 mm]

- Metanepisternal sutures obsolete behind; anterior portion of epifrons parallel-sided; rostrum and vertex squamose........ 4

4 Body size larger than 4 mm; pronotum covered with round recumbent, overlapping flat scales; elytra with dense entire round scales; setae on elytra weakly erect, spatulate, shorter and obtuse; rostrum as long as wide or slightly elongate [RL/RW: 1–1.1]; pronotum of equal width at anterior and posterior edge; eyes larger, flat; subscutellar callosity large, without tubercles; hind coxae reaching elytra.................................................................. Oncophyes Marshall

- Body size 2.7–3.5 mm; pronotum covered with umbrella-shaped erect scales (natively coated by soil particles); elytra with dense multiply excised round scales; setae on elytra strongly erect, slender, very long and acute; rostrum 2 x as long as wide; pronotum much narrower at anterior than posterior edge; eyes small, strongly convex; subscutellar callosity tiny, with two sharp tubercles; hind coxae narrowly separated from elytra............. Stenorrhamphus Marshall [ S. crinitus (Marshall) ]