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 wittmeri Brancucci, 1983 ( Figs. 17 , 35 ) Laccophilus wittmeri Brancucci, 1983: 260 (original description); Hájek, 2003: 120 (in part, new records). Type locality. Tonkin , Hoa Binh [= Vietnam , Hoa Binh Province ]. Material examined. 62 specimens . MYANMAR : 2 males 2 females , Shan state , road Kalaw – Thazi , km 23, 20°42.378′N 96°30.218′E , 720 m , 24 October 1998 , coll. H. Schillhammer ( NHMW , NMPC ) . THAILAND : Chiang Mai Province : 1 female , Doi Suthep , 950 m , 5 March 1987 , coll. P. Schwendinger ( LHCM ) ; 1 female , Doi Suthep , 5 November 1995 , coll. N. Nieser ( NBCL ) ; 2 males 1 female , Chiang Dao env., 21 May–4 June 1995 , coll. M. Snížek ( JSCL ) ; 1 female , 50 km N Chiang Mai , 2 August 2000 , coll. KROLL & L. Kratzerová ( NMPC ) . Loei Province : 8 ex. , Phu Hin Rongkla National Park , Huai Khamunoi waterfall, 1250 m , 25 December 1995 , coll. P. Mazzoldi ( PMCB ) . Mae Hong Son Province : 1 female , Ban Huei Po , 1600 m , 8–17 May 1992 , coll. S. Bílý ( NHMB ); 17 ex. , Road Mae Chem – Mae Hong Son , 4 km after Huai Boing , 1000 m , 29 December 1999 , coll. P. Mazzoldi ( NMPC , PMCB ) . LAOS : Bolikhamsay Province : 16 males , 9 females , Nam Kading NBCA, Tad Paloy campsite , forest stream , 18°23.17′N , 104°09.65′E , 300 m , 8–11 July 2010 , coll. M. Brancucci & M. Geiser ( NHMB ); 3 males 1 female , Nam Kading NPA, Tad Paloy campsite , 18°21–23′N, 104°09′E, 250–400 m , 24–28 May 2011 , coll. M. Geiser & D. Hauck ( NHMB , NMPC ). Khammouan Province : 1 male , Nakai-Nam Theun NPA, Ban Navang env., 17°57–59′N, 105°13–16′E, 600–750 m , 18–21 May 2012 , NHMB Basel, Laos 2012 Expedition, M. Brancucci , M. Geiser , K Phanthavong & S. Xayalath ( NHMB ). Louang Namtha Province : 2 ex. , ca. 10 km E Muang Sing , Ban Oudomsinh-B . Nam Det-B . Nam Mai env., 21°09–10′N, 101°13–15′E, 750–1400 m 14–20 May 2011 , coll. D. Hauck & M. Geiser ( NHMB ). Xieng Khouang Prov . : 4 males 2 females , 30km NE Phonsavan : Ban Na Lam → Phou Sane Mt. , 19°37–8′N 103°20′E, 1300–1500 m , 10–30 May 2009 , coll. M.Brancucci ( NHMB ). VIETNAM : 1 male , Deo Pha Din , 4 May 1995 , coll. M. Sâto ( EUMJ ) ; 1 male 3 females , Lai Chau , 18 May 1995 , coll. M. Satô ( EUMJ , NHMB ) . Diagnosis. Large broadly oval species (body length 4.5–5.1 mm ). Reticulation of elytra composed of shallowly impressed very large meshes. Ground colour of elytra dark, brownblackish; mediolateral spot present ( Fig. 17 ). Apical part of median lobe relatively shorter, with dorsal side lightly curved, and short and hooked apex; in lateral view with dorsal side almost straight ( Fig. 35 ). Distribution. Brancucci (1983) described the species from northern Laos and Vietnam . Later, Nilsson (1995) and Hájek (2003) published the species from southern China ( Yünnan ). The present records from Myanmar and northern Thailand extend the distributional area of Laccophilus wittmeri in the border area between the Palaearctic and Oriental zoogeographical regions ( Fig. 41 ).