Subtribal, Generic And Subgeneric Composition Of Darkling Beetles Of The Tribe Helopini (Coleoptera: Tenebrionidae) In The Eastern Palaearctic Region Author Nabozhenko, Maxim Author Ando, Kiyoshi text Acta Zoologica Academiae Scientiarum Hungaricae 2018 2018-10-12 64 4 277 327 http://dx.doi.org/10.17109/azh.64.4.277.2018 journal article 10.17109/AZH.64.4.277.2018 2064-2474 12626311 Key to Palaearctic species of the genus Apterotarpela 1 Anterior margin of frontoclypeus widely emarginate. Elytral intervals without tubercles ( Fig. 3B ), coeloconic sensilla located on flattened surface of interstriae A. clypealis – Anterior margin of frontoclypeus straight. Elytral intervals bearing tubercles with coeloconic sensilla ( Figs 3A,C ) 2 2 Elytral interval VIII strongly convex, keel-shaped. Elytra with rounded lateral margins. Wings strongly reduced A. klapperichi