Larval morphology of the Japanese species of the tribes Acidocerini, Hydrobiusini and Hydrophilini (Coleoptera: Hydrophilidae) Author Minoshima, Yûsuke Author Hayashi, Masakazu text Acta Entomologica Musei Nationalis Pragae 2011 suppl. 2011-06-30 51 1 118 journal article 9575 10.5281/zenodo.4272324 28715dfb-d0e9-4da8-a9a7-6ee9d6ecd150 0374-1036 4272324 Genus Hydrochara Berthold, 1827 ( Figs. 2 A–B, 51A, 52–55, 64A–B, 65B, 67B) Diagnosis. This genus is distinguished from Japanese Hydrophilini by the following combination of characters: (1) frontal lines V-shaped ( Fig. 54A ); (2) nasale without distinct teeth, slightly serrate ( Figs. 52C , 55A ); (3) inner face of scape strongly serrate in first instar ( Fig. 53A ); (4) three setae (AN7–9) close to antennal sensorium (SE1) ( Fig. 53A ); (5) mandibles symmetrical, with two inner teeth ( Figs. 53 B–C, 55D–E); (6) abdominal segments with long setiferous projections on each side ( Figs. 2 A–B, 51A).