Epexochus

Meregalli, Massimo & Talamelli, Fabio, 2009, Revision of the genus Epexochus Reitter, with description of three new species (Coleoptera: Curculionidae: Lixinae: Cleonini), Zootaxa 2011, pp. 47-68 : 50

Key to the species of Epexochus

1. Base of pronotum distinctly curved towards scutellum (Fig. 42); elytral scales very slender, lanceolate ( Fig. 37 ); southern Tajikistan.......................................................................................................................... E. korotyaevi sp. n.

– Base of pronotum nearly straight or weakly, very evenly arched (Fig. 18); elytral scales oval or oval-elliptical, aciculate ( Fig. 36 )............................................................................................................................................................... 2

2. All elytral intervals flat, also at base, elytra convex, sides broadened; apical lamella of aedeagus expanded, broadly rounded (Fig. 80); western Mongolia: Kobdo Aimak ................................................................... E. mongolicus sp. n.

– Elytral intervals 3, 5, 7 and 9 moderately but distinctly raised, at least at base; apical lamella of aedeagus short, acute or nearly so .................................................................................................................................................................. 3

3. Size> 15 mm; elytra convex, odd intervals only raised at base; elytral setae stiff, of variable length, sometimes relatively long but never longer than an interval width; apical lamella of aedeagus subacute ( Figs. 32–35 ); Kazakhstan, China (Xinjiang) .................................................................................................................... E. lehmanni (Ménétries)

– Size <15 mm; elytra flat, odd intervals slightly convex up to declivity; elytral setae long, hair-like, flexible; apical lamella of aedeagus shortly acute (Fig. 63); Uzbekistan..................................................................... E. voriseki sp. n.

Figures

FIGURES 21 – 39. Epexochus, genitalia, claws and scales. Female genitalia (21 – 23: specimen from Kzyl-Dzhar; 24 – 25: specimen from Aulie-ata). 21, 24, sternum VIII; 22, 25, spermatheca; 23, hemisternites. Claws. 26, specimen from Borokhoro. Aedeagus, dorsal and lateral views and detail of apex. 27, 30, 35, specimen from Koibun; 28 – 29, 32, specimen from Elton lake; 31, specimen from Dzharkentsk; 33, specimen from Betpak; 34, specimen from Borokhoro. Elytral scales. 36, holotype of E. lehmanni; 37, holotype of E. korotyaevi; 38, holotype of E. voriseki; 39, paratype of E. mongolicus. Scale bars: 21, 23 – 24, 27 – 31: 1 mm; 26, 32 – 35: 500 μm; 36 – 39: 100 μm.