Haliplus (Liaphlus) angustifrons Régimbart, 1892

Figs 12, 18E Japanese name: Usucha-kogashira-mizumushi

Haliplus angustifrons Régimbart, 1892: 112. van Vondel 1993: 292; Sheth et al. 2016: 361.

Haliplus kotoshonis: Vondel, 1991: 113 [misidentification]; Aoyagi 2014: 192 [misidentification].

Material examined.

2 exs., Kagoshima Prefecture: Amagi, Amagi-cho, Ôshima-gun, Tokuno-shima, 1.XI.2010, H. Iketake leg. (HIPC) ; 27 exs., Okinawa Prefecture: Ohgimi, Ohgimi-son [Okinawa-jima], 19.III.2014, R. Okano leg. (EUMJ) ; 1 ex., Okinawa Prefecture: Nakama, Onna-son [Okinawa-jima], 30.X.2011, H. Iketake leg. (HIPC) ; 1 ex., Okinawa Prefecture: Onna-dam, Sokei, Ginoza-son [Okinawa-jima], 30.X.2011, H. Iketake leg. (HIPC) ; 6 exs., Okinawa Prefecture: Nuuha, Ohgimi-son [Okinawa-jima], 8.I.1989, Y. Abe & T. Abe leg. (KPMNH) ; 1 ex., Okinawa Prefecture: Gima, Kumejima-cho, 19.V.2007, Y. Kamite leg. (EUMJ) ; 1 ex., Okinawa Prefecture: Kanegusuku, Kumejima-cho, 20.V.2007, Y. Kamite leg. (EUMJ) ; 6 exs., Okinawa Prefecture: Uehara, Taketomi-cho (24.40°N, 123.79°E) [Iriomote-jima], 14.III.2017, T. Iwata leg. (TIPC) ; 1 ex., Okinawa Prefecture: Ishigaki-jima, 5.VI.1970, T. Hozumi leg. (EUMJ) .

Measurements

(n = 10). TL 3.66-5.36 (4.98) mm; HW 0.80-0.87 (0.84) mm; CED 0.27-0.30 (0.28) mm; PL 0.76-0.82 (0.79) mm; PW 1.64-1.76 (1.68) mm; EL 2.67-2.86 (2.76) mm; EW 2.04-2.25 (2.14) mm; BT 1.48-1.69 (1.59) mm; HW/CED 2.85-3.07 (2.95); PW/PL 2.07-2.17 (2.12); EL/EW 1.27-1.32 (1.29).

Biology.

The above specimens were collected from small ponds.

Immature stages.

Unknown.

Discussion.

Haliplus angustifrons is widely distributed from south Asia to southeast Asia (van Vondel 1993; Sheth et al. 2016), but there are no records in east Asia. The pattern of dorsal marks, the shape of the prosternal process, and male genitalia are in agreement with the redescription of H. angustifrons (van Vondel 1993). The figures of " H. kotoshonis " given by van Vondel (1991, 1993) are not of true H. kotoshonis, and at least the records of Japanese specimens correspond to H. angustifrons .

Distribution.

Japan (new records): Nansei shoto (Tokuno-shima, Okinawa-jima, Iheya-jima, Kume-jima, Ishigaki-jima, Iriomote-jima); Pakistan, India, Sri Lanka, Nepal, Myanmar, Laos, Vietnam.