Description of the Larva of Laccophilus yoshitomii Watanabe and Kamite, 2018 (Coleoptera: Dytiscidae: Laccophilinae)

Abstract The larva of Laccophilus yoshitomii Watanabe and Kamite, 2018 from Japan is described for the first time, with an emphasis on the chaetotaxy analysis of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi. The larva of L. yoshitomii is characterized as follows: setae MX5 and MX6 curved posteriorly, seta FE5 longer than FE6, setae TI1 and TI7 approximately the same length, seta AB11 longer than AB15, setae UR2–4, 7 long (instar I), and each posterolateral margin of PA with 2 secondary setae (instar II–III). Wild individuals tend to be darker than reared individuals, probably owing to the lightness and color of the surrounding environment.