Helops, Fabricius, 1775

Nabozhenko, M. V. & Keskin, B., 2017, Taxonomic review of the genus Helops Fabricius, 1775 (Coleoptera: Tenebrionidae) of Turkey, Caucasian Entomological Bulletin (Caucas. entomol. bull.) 13 (1), pp. 41-49 : 48

Key to species of the genus Helops of Turkey

1(2). Prothoracic hypomera with coarse irregular wrinkles. Elytra with strongly depressed coarse and dense transverse wrinkles, rarely without depressed wrinkles (population from Kartal Dağ, Konya). Frons strongly convex, transverse depression between frons and frontoclypeus divided into two lateral impressions by frons ........................................................... H. glabriventris

2(1). Prothoracis hypomera with coarse, sometimes merged punctures. Elytra without wrinkles or with weakly depressed wrinkles. Frons weakly convex, transverse depression between frons and frontoclypeus continuous.

3(7). Head with long recumbent reddish or white hairs.

5(6). Elytral interstriae flat. Scutellum with short recumbent setae. Pronotum with acute posterior angles ................. ............................................................ H. caeruleus stevenii

6(5). Elytral interstriae convex. Scutellum not setated. Pronotum with obtuse or right posterior angles ........... ................................................................................... H. rossii

7(3). Head only with very short fine setae.

8(9). Protrusion of mentum strongly elevated and distinctly visible at lateral view. Punctation of elytral interstriae fine and sparse, punctures at apical half 3–4 times shorter than strial punctures. Punctation of femora and tibiae moderately coarse, not dense, puncture diameter equal or less than interpuncture distance ...... ............................................................................. H. cyanipes

9(8). Protrusion of mentum strongly elevated and distinctly visible at lateral view. Punctation of elytral interstriae coarser and denser, punctures at apical half subequal to strial punctures. Punctation of femora and tibiae very dense and coarse, puncture diameter 2–3 times as long as interpuncture distance ........ H. punctatissimus sp. n.