Taxonomic notes on Laccobius, subgenus Glyptolaccobius, with new records and description of four new species (Coleoptera: Hydrophilidae) Author Gentili, Elio Via San Gottardo 37, I- 21030 Varese-Rasa, Italy; e-mail: elio. gentili. 32 @ alice. it Author Fikaček, Martin Department of Entomology, National Museum, Kunratice 1, CZ- 148 00 Praha 4, Czech Republic; e-mail: mfikacek @ seznam. cz & Department of Zoology, Faculty of Science, Charles University in Prague, Viničná 7, CZ- 128 44 Praha 2, Czech Republic text Acta Entomologica Musei Nationalis Pragae 2009 2009-12-15 49 2 607 623 journal article 10.5281/zenodo.5321314 0374-1036 5321314 Laccobius ( Glyptolaccobius ) moriyai Kamite, Ogata & Hikida, 2007 ( Figs. 4 , 8 ) Type locality. Japan , Honshu Island, Yamagata Prefecture , Asahi-Mura, Arasawa. Type material (not examined). HOLOTYPE : J ( ELEU ): ‘Arasawa, Asahi-Mura, Yamagata Pref. , H. Moriya leg. 23-IX-2004 ’. PARATYPES : 4 spec. , same data as holotype. Length 2.30–2.50 mm ; width 1.40–1.50 mm . Additional material examined: JAPAN : HONSHU ISLAND: Yamagata Pref. , Arasawa-dam, Tsuruoka-shi, T. Ikeda leg. 16.viii.2008 , 1 J 1 ♀ ( MSNV , NMPC ). Differential diagnosis. Laccobius moriyai belongs to a group of species with curved hind tibiae, shining black elytra with longitudinal rows of punctures of which only the first one is sulciform. The combination of uniformly black dorsal colouration and apically strongly widened apex of the median lobe is not found in any other species of Glyptolaccobius . Distribution. Laccobius moriyai is the first representative of the subgenus Glyptolaccobius occurring in the Palaearctic Region. So far the species is known only from the environs of the Arasawa Dam in the Yamagata Prefecture in Japan (Honshu island).