Haliplus (Nipponiplus) japonicus Sharp, 1873

Hayashi, Masakazu, Iwata, Tomofumi & Yoshitomi, Hiroyuki, 2023, Revision of the family Haliplidae (Insecta, Coleoptera) in Japan, ZooKeys 1168, pp. 267-294 : 267

Haliplus (Nipponiplus) japonicus Sharp, 1873

Figs 4 , 18C Japanese name: Kubiboso-kogashira-mizumushi

Haliplus japonicus Sharp, 1873: 55. Kamiya 1936: 44; Satô 1985: 181; Nakane 1963a: 55; 1985: 62; 1987: 29; Matsui 1992: 2; Vondel 1995: 122; Tomisawa 2012: 42; Matsuo and Fukagawa 2016: 51; Mitamura et al. 2017: 138; Hayashi and Kadowaki 2019: 25; Nakajima et al. 2020: 20.

Haliplus (Haliplus) japonicus : Satô, 1984: 1; Vondel 2003a: 31; Vondel et al. 2006: 250.

Haliplus (Nipponiplus) japonicus : Vondel 2019: 22.

Haliplus brevior Nakane, 1963a: 55. Nakane 1985: 62; 1987: 29. [synonymized with H. minutus by Satô (1984) but with H. japonicus by van Vondel et al. (2006)]

Material examined.

Specimens examined in this study are listed in Suppl. material 1.

Measurements

(n = 10). TL 2.69-4.08 (3.79) mm; HW 0.62-0.69 (0.67) mm; CED 0.29-0.32 (0.30) mm; PL 0.55-0.66 (0.62) mm; PW 1.05-1.20 (1.12) mm; EL 1.99-2.20 (2.10) mm; EW 1.50-1.71 (1.60) mm; BT 1.12-1.28 (1.19) mm; HW/CED 2.12-2.35 (2.24); PW/PL 1.65-2.04 (1.76); EL/EW 1.25-1.34 (1.32).

Biology.

This species usually lives in fresh waters with abundant aquatic plants such as ponds, paddies, and streams ( Nakajima et al. 2020). The larvae eat Zygnemataceae algae ( Hayashi 2015). The adults were collected by sweep netting in shallow waters and are rarely attracted by light traps ( Hayashi 2015). The pupation in mud with a pupal chamber was accomplished by laboratory rearing ( Hayashi 2015).

Immature stages.

The color photographs were provided by Mitamura et al. (2017) and Nakajima et al. (2020).

Distribution.

Japan: Hokkaido, Honshu, Shikoku, Kyushu, Noto-jima, Oki, Goto-retto, Taka-shima, Amakusa-shoto; China, Far East Russia.

Figures

Figure 4. Haliplus japonicus A habitus B head C prosternal process D penis E left paramere F right paramere. Scale bars: 1.0 mm (A); 0.5 mm (B); 0.25 mm (C); 0.1 mm (D-F).

Figure 18. Distribution maps based on specimens examined A Peltodytes intermedius B Peltodytes sinensis C Haliplus japonicus D Haliplus kamiyai (circle), Haliplus morii (star), Haliplus regimbarti (square) E Haliplus simplex (black circle), Haliplus angustifrons (white circle) F Haliplus basinotatus (black circle), Haliplus kotoshonis (white circle).