Helophorus sibiricus

Description:

Description: English: Figures 5–9. Helophorus sibiricus (Motschulsky, 1860) 5 habitus of a recent specimen (Mongolia, Baga-Tenger, coll. National Museum, Prague) 6–7 detail of mentum, the arrow indicates a characteristic emargination on the anterior margin of mentum (6 fossil specimen, SEM micrograph 7 recent specimen, view from inside) 8–9 detailgranulation of head and pronotum, SEM micrographs (8 recent specimen 9 fossil specimen). Date: 24 September 2011. Source: Fikácek, Martin (2011-09-24). "A long-living species of the hydrophiloid beetles: Helophorus sibiricus from the early Miocene deposits of Kartashevo (Siberia, Russia)". ZooKeys 130: 239–254. DOI:10.3897/zookeys.130.1378. ISSN 1313-2970. Author: Martin Fikáček.