Haliplus (Liaphlus) ovalis Sharp, 1884

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

Haliplus (Liaphlus) ovalis Sharp, 1884

Figs 16 , 19B Japanese name: Hime-kogashira-mizumushi

Haliplus ovalis Sharp, 1884: 440. Kamiya 1936: 46; Satô 1985: 181; Nakane 1963a: 55; 1985: 63; 1987: 30; Matsuo and Fukagawa 2016: 52; Hayashi and Kadowaki 2019: 25; Nakajima et al. 2020: 23.

Haliplus (Liaphlus) ovalis : Satô 1984: 3; Vondel 1991: 125; 2003a: 32.

Material examined.

3 exs., Kagoshima Prefecture : Amagi , Amagi-cho , Ôshima-gun, Tokuno-shima, 1.XI.2010, H. Iketake leg. (HIPC) ; 1 ex., Niigata Prefecture : Ohura , Aikawa-machi, Sadoga-shima, 27-30. V. 1989, Y. Abe & T. Abe leg. (KPMNH) ; 11 exs., Kagoshima Prefecture : Ontsukan, Okinoerabu-jima, 3.VIII.1958, S. Ueno & Y. Morimoto leg. (EUMJ) ; 3 exs., Kagoshima Prefecture : Minzuki-ike, Okinoerabu-jima, 16.VIII.1958, S. Ueno & Y. Morimoto leg. (EUMJ) ; 12 exs., Kagoshima Prefecture : Okinoerabu-jima, 4.VIII.1958, S. Ueno & Y. Morimoto leg. (EUMJ) .

Measurements

(n = 10). TL 3.80-5.97 (5.47) mm; HW 0.90-0.99 (0.95) mm; CED 0.37-0.43 (0.40) mm; PL 0.74-0.85 (0.80) mm; PW 1.57-1.75 (1.66) mm; EL 2.81-3.18 (3.06) mm; EW 2.10-2.38 (2.22) mm; BT 1.67-1.95 (1.79) mm; HW/CED 2.29-2.50 (2.44); PW/PL 1.99-2.16 (2.13); EL/EW 1.34-1.42 (1.39).

Biology.

This species typically inhabits ponds, and the adults were collected by sweep nets over shallow water and a light trap ( Nakajima et al. 2020).

Immature stages.

The larva was illustrated by Satô and Yoshitomi (2018).

Discussion.

Haliplus chinensis Falkenström, 1932 distributed in mainland China is closely similar to this species. van Vondel (1991) states that the distinguishing points of both species, H. ovalis and H. chinensis , are the distance between the eyes and the morphology of the apical curve of penis (smooth in H. chinensis and flexed in H. ovalis ). But some individuals from Ryukyu (Okinoerabu-jima and Tokunoshima), Shikoku (Ehime Prefecture), and Honshu (Niigata Prefecture) have a smooth apex of the penis. Further detailed comparisons of both species are necessary.

DNA barcodes.

The sequences of COI (Cox1) gene of Japanese specimens are deposited in DDBJ ( Hayashi and Ooi 2022): Shimane Prefecture (LC633208-LC633212).

Distribution.

Japan: Hokkaido, Honshu, Shikoku, Kyushu, Sado (new record), Oki, Goto-retto, Nansei shoto (Tokuno-shima, Okinoerabu-jima: new record).

Figures

Figure 16. Haliplus ovalis 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.