Review of the Taiwanese Laccobius Erichson, 1837 (Coleoptera: Hydrophilidae) with description of a new species Author Liu, Hsing-Che Taiwanese Society of Insect Natural History, No. 8, Wufeng Rd., Hsinchu County 310, Taiwan. Author Fikáček, Martin 0000-0002-2078-6798 Department of Biological Sciences, National Sun Yat-sen University, No. 70 Lien-hai Rd., Kaohsiung City 80424, Taiwan. & Department of Entomology, National Museum, Cirkusová 1740, CZ- 19100 Praha 9 - Horní Počernice, Czech Republic. & Department of Zoology, Faculty of Science, Charles University, Viničná 7, CZ- 12844 Praha 2, Czech Republic. mfikacek @ gmail. com; https: // orcid. org / 0000 - 0002 - 2078 - 6798 mfikacek@gmail.com text Zootaxa 2021 2021-04-20 4963 3 587 599 journal article 7088 10.11646/zootaxa.4963.3.11 37bbbcdd-7455-4fd2-854c-49f010b3b27c 1175-5326 4704278 05C2E47F-426D-42EF-B07E-D586C63B6527 Laccobius ( Microlaccobius ) fragilis Nakane, 1966 Ḏ弱flǿ牙ḃ ( Fig. 18 ) Laccobius ( Microlaccobius ) fragilis Nakane, 1966: 57 . Laccobius ( Microlaccobius ) fragilis : Gentili (2003: 422) (records from Taiwan) . Material examined. No specimens were examined. Published record: Taitung ( Gentili 2003 ). Distribution. China ( Gansu , Liaoning , Shaanxi ), Japan (Honshu, Shikoku, Kyushu), Korea , Russia ,? Taiwan ( Gentili 2003 ; Nakajima et al . 2020 ; Przewoźny 2020 ). Comments. The first and so far the only record of this species from Taiwan is a male from Taitung (southern Taiwan) mentioned by Gentili (2003) . This species is very similar to L. formosus , and can be differentiated by the narrower median lobe of the aedeagus ( Fig. 18 ). We did not find any specimens of L. fragilis in this study, although we also examined specimens from Taitung . The occurrence of L. fragilis in Taiwan hence needs to be reconfirmed. However, more species usually co-occur at localities sampled by us in Taiwan and we hence cannot exclude that L. fragilis may be rare and hence unrecorded by us. Therefore, we still maintain L. fragilis as a member of Taiwanese fauna.