Key to species of genus Acinopus Dejean, 1821 of Iran

1 Right mandible with excision at dorsal edge (subgenus Acinopus)...............................................2

- Right mandible without excision at dorsal edge............................................................. 4

2 Excision of dorsal edge of right mandible situated close to base (Fig. 7). Anterior angles of clypeus as a rule with two setiferous pore punctures each. 10–17 mm. W Europe to Near East and Iran ................... A. (s.str.) picipes (Olivier, 1795)

- Basal angle of excision distinctly distant from base (Figs 5, 6). Anterior angles of clypeus with one setiferous pore puncture each................................................................................................ 3

3 Basal angle somewhat to distinctly behind level of apical margin of clypeus (Fig. 6). Macropterous species. 11–17 mm. From Greece to north-western China and Kashmir................................... A. (s.str.) laevigatus Ménétriés, 1832

- Basal angle somewhat anterior to level of apical margin of clypeus (Fig. 5). Brachypterous species, elytra fused at suture. 13– 17.1 mm. Southern Zagros Mts...................................................... A. (s.str.) zagrosensis sp. n.

4 Clypeus not strongly emarginate, tarsi smooth above......................................................... 5

- Clypeus strongly emarginate. Tarsi densely covered with hairs above, 12–17 mm. From Greece to north-western China and Kashmir..................................................... A. (Oedematicus) megacephalus (A. Rossi, 1794)

5 Right mandible at dorsal edge basally slightly incurved and strongly crenulate in apical half, surface of mandibles distinctly coarsely furrowed. Elytra with deepened striae, interval 3 without pore puncture, surface matt by strong reticulation. Body wide and slightly flattened, larger, 18–28 mm. Distributed from Italy to Middle Asia...................................................................................................... A. (Osimus) ammophilus Dejean, 1829

- Right mandible at dorsal edge not incurved and not crenulate in apical half, surface of mandibles finely furrowed. Elytra with very fine striae, interval 3 as a rule with pore puncture in apical third, surface shiny by very weak reticulation. Body short-oval, convex, and smaller, 14–19 mm. From Armenia, Azerbaidjan, and Iran to Middle Asia, Afghanistan und north-western China................................................................. A. (Haplacinopus) striolatus Zoubkoff, 1833