A taxonomic review of the Oriental Laccophilus javanicus species group (Coleoptera: Dytiscidae) Author Hájek, Jiří Department of Entomology, National Museum, Cirkusová 1740, CZ- 193 00 Praha 9 – Horní Počernice, Czech Republic jiri_hajek@nm.cz Author Brancucci, Michel Naturhistorisches Museum, Basel, Switzerland text Raffles Bulletin of Zoology 2015 2015-08-06 63 309 326 journal article 55750 10.5281/zenodo.5385198 c7f95b94-53f8-420d-97c5-4e27d7c211bf 2345-7600 5385198 AC7F1491-CD89-4F10-9D61-55354B55E368 Laccophilus tonkinensis Brancucci, 1983 ( Figs. 16 , 34 ) Laccophilus tonkinensis Brancucci, 1983: 258 (original description); Hájek, 2003: 120 (new records). Type locality. Tonkin , Hoa Binh [= Vietnam , Hoa Binh Province ] . Material examined. 17 specimens . CHINA : Hainan : 4 ex. , Limushan Mts. , exposed pools along road, partly connected with stream, 19°9.1–2′N, 109°45–46′E, 550–750 m , coll. M. Fikáček & S. Zhao ( NMPC , ZSMG ) ; 1 male , Jianfengling Mts. , Tianchi Lake env., rd from Tianchi vill. To “sector 5”, pools in shaded drying-up stream in primary forest, 18°43.6–44.1′N, 108°52.1–5′E, 820–950 m , 10 May 2011 , coll. M. Fikáček & S. Zhao ( NMPC ) . LAOS : Attapeu Province : 3 males , road No. 18, km 80 E Attapeu , stream near the road, 17°48.6′N , 107°23.4′E , ca. 665 m , 29 April 2010 , coll. J. Hájek ( NMPC ) . Khammouan Province : 1 male 4 females , Nakai-Nam Theun NPA, Ban Navang env., 17°57–59′N, 105°13–16′E, 600–750 m , 18–21 May 2012 , NHMB Basel Expedition Laos 2012, M. Brancucci , M. Geiser , K. Phanthavong , S. Xayalath ( NHMB ) . V IETNAM : 4 ex. , Tonkin , coll. de Cooman ( IRSNB ) . Diagnosis. Medium sized, elongate oval species (body length 3.8–4.1 mm ). Elytra with subbasal testaceous band broad, more or less connected with elytral base ( Fig. 16 ). Apical part of median lobe in lateral view with distinct bulge on dorsal side; apex elongate with pointed tip ( Fig. 34 ). Habitat. In Hainan, Laccophilus tonkinensis was collected in pools in shaded drying up stream in primary mountane forest. In southern Laos , it was collected in a pool in a small forest stream with a clay bottom and a layer of decaying leaves ( Fig. 39 ). Distribution. A species described from northern Vietnam and subsequently recorded from Hainan Island, China ( Brancucci, 1983 ; Hájek, 2003 ). Here we present the first records from central and southern Laos ( Fig. 40 ).