Helopini, Latreille, 1802

Purchart, Luboš, Nabozhenko, Maxim V. & Ras, Kola Scientific Centre, 2012, Figures 1 – 7. Habitus, Dorsal View. 1 In Revision Of The Genus Adelostoma (Coleoptera: Tenebrionidae). Part 1: Subgenus Zarudnionymus Semenov & amp; Bogatchev, 1947, Acta Entomologica Musei Nationalis Pragae 52, pp. 295-302 : 301

Key to subtribes and generic groups of the tribe Helopini based on larvae

[Modified key based on GILYAROV & SVETOVA (1963); NABOZHENKO & GURGENIDZE (2006); for authors and years of descriptions of the genera of Cylindrinotina see LÖBL et al. (2008)]

1. Abdominal segment 9 with small cylinder-shaped or cone-shaped protuberances at base of urogomphi. Subtribe Сylindrinotina ......................................................................... 2

– Abdominal segment 9 without small cylinder-shaped or cone-shaped protuberances at base of urogomphi. Subtribe Helopina ................................................................................... 3

2. Labrum with 8 marginal and 2 discal setae on dorsal side. ................................................ ..................................... Nalassus group of genera [ Nalassus , Zophohelops , Xanthomus ]

– Labrum with 10 marginal and 2 discal setae on dorsal side. .............................................. .................... Cylindrinotus group of genera [ Odocnemis (Heloponotus) , Cylindrinotus ]

3. Abdominal tergite 8 without spines or protuberances (hedyphanoid type). ....................... ........................................................................ Hedyphanes Fischer von Waldheim, 1820

– Abdominal tergite 8 with spines and protuberances (helopioid type). ............................ 4

4. Unpaired protuberance on abdominal tergite 8 with one distinct, strongly sclerotized apex. Surface of this protuberance bumpy. Large holes only on surface of abdominal tergite 8. Labrum with about 18–20 marginal and 6 discal setae. ........... Probaticus Seidlitz, 1896

– Unpaired protuberance on abdominal tergite 8 with two distinct apices or only somewhat bidentate apex. Surface of this protuberance smooth. ..................................................... 5

5. Whole surface of abdominal tergite 8 and partly surface of abdominal tergite 7 covered by large, deep and rounded holes. Labrum with 10 marginal and 4 discal setae. Large bifid protuberance of tergite 8 without spines. .................................... Helops Fabricius, 1775

– Only surface of abdominal tergite 8 covered by large deep rounded holes. Labrum with 8 marginal and 2 discal setae. Large protuberance of tergite 8 with 2 short spines. ............ .......................................................................................................... Deretus Gahan, 1900