Copelatus japonicus Sharp, 1884 Source of material. The four instar III larvae studied were associated with adults collected at the following locality: Taiwan. Taipei, Beitou, 24.VIII.1994; L.J. Wang leg. The identification is firm as C. japonicus is the only Copelatus species collected at this locality. Diagnosis (instar III). The third instar of Copelatus japonicus can easily be distinguished from that of the other species studied in this paper by the following combination of characters: HL = 0.90 mm; L3 1.50; GA/ MP1> 1.50; 1.30

Published as part of Alarie, Yves, Michat, Mariano C., Watanabe, Kohei, Shaverdo, Helena, Wang, Liang-Jong & Watts, Chris H. S., 2022, An outlook on larval morphology of Copelatinae diving beetles with phylogenetic considerations (Coleoptera: Adephaga, Dytiscidae), pp. 151-205 in Zootaxa 5175 (2) on pages 168-169, DOI: 10.11646/zootaxa.5175.2.1, http://zenodo.org/record/7003344