Haliplus (Liaphlus) eximius Clark, 1863

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

Haliplus (Liaphlus) eximius Clark, 1863

Figs 15 , 19A Japanese name: Kiiro-kogashira-mizumushi

Haliplus eximius Clark,1863: 418. Kamiya 1936: 42; Satô 1985: 181; Nakane 1985: 63; 1987: 29; Matsui 1992: 2; Vondel 1995: 121; Dejima 2007: 84; Matsuo and Fukagawa 2016: 52; Mitamura et al. 2017: 141; Hayashi and Kadowaki 2019: 25; Nakajima et al. 2020: 23; Watanabe and Ohba 2022: 34.

Haliplus (Liaphlus) eximius : Satô 1984: 2; Vondel 1991: 97; 1993: 299; 2003a: 31.

Haliplus hiogoensis Kano & Kamiya, 1931: 1. Kamiya 1936: 44. [synonymized by Satô 1984]

Material examined.

1 ex., Ehime Prefecture: Ôshima, 13.VIII.1997, H. Nakanishi leg. (EUMJ). Other specimens examined in this study are listed in Suppl. material 1.

Measurements

(n = 10). TL 3.26-4.71 (4.38) mm; HW 0.70-0.78 (0.75) mm; CED 0.27-0.33 (0.30) mm; PL 0.69-0.75 (0.73) mm; PW 1.33-1.54 (1.46) mm; EL 2.10-2.53 (2.36) mm; EW 1.66-1.94 (1.85) mm; BT 1.31-1.51 (1.44) mm; HW/CED 2.23-2.70 (2.49); PW/PL 1.89-2.08 (2.03); EL/EW 1.24-1.32 (1.27).

Biology.

This species typically inhabits ponds, and the adults were collected by sweep nets over shallow water ( Nakajima et al. 2020). The larvae eat Characeae algae ( Yamazaki et al. 2020).

Immature stages.

The color photograph was shown by Kitano and Sano (2011).

DNA barcodes.

The COI (Cox1) gene sequence of one Japanese specimen were deposited in DDBJ ( Hayashi and Ooi 2022): Shimane Prefecture (LC633207).

Distribution.

Japan: central to west Honshu, Shikoku, Kyushu, Oki, Hiro-shima in Kagawa, Geiyo-shoto ( Ôshima: new record), Tsushima, Iki, Hirado-jima, Goto-retto, Amakusa-shoto, Nansei shoto (Yonaguni-jima); Korea, China, SE Asia.

Figures

Figure 15. Haliplus eximius 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 19. Distribution maps based on specimens examined A Haliplus eximius B Haliplus ovalis C Haliplus sharpi.