Pseudosmittia palauensis (Tokunaga)

Ferrington Jr, Leonard C. & Saether, Ole A., 2011, A revision of the genera Pseudosmittia Edwards, 1932, Allocladius Kieffer, 1913, and Hydrosmittia gen. n. (Diptera: Chironomidae, Orthocladiinae) 2849, Zootaxa 2849 (1), pp. 1-314 : 188

Pseudosmittia palauensis (Tokunaga)

( Fig. 69 D–G )

Smittia palauensis Tokunaga, 1964: 520 , pro parte.

Pseudosmittia palauensis (Tokunaga) , Cranston & Martin 1989: 262, pro parte.

Material examined: PALAU (BELAU): Angaur Island , holotype male, 5.ii.1948, Dybas ( USNM 66537 ) . PALAU: Babelthuap Island , Ngaremlengui, light trap, paratype male, 1.vi.1957, C. W. Sabrosky; Ngiwal, Light trap, 1 male, 19 v 1957, C. W. Sabrosky ( BBM) ;

Diagnostic characters: The male imago can be separated from other species of the group by the short gonostylus (HR 3.04–3.06) with an apical crista dorsalis and the relatively large triangular anal point.

Male imago (n = 2–4)

All measurements and ratios within the range of P. forcipata (p. 298) with the following exceptions and additions: Wing ( Fig. 69 D ) length 0.78–0.82, 0.81 mm. Total length/wing length 1.80–2.05. Coloration dark brown. AR 0.98–1.02, 1.01; no strong apical seta. Tentorium 87–94 µm long. Third palpomere 46–50 µm long, with 7 scalpellate or pin-like sensilla clavata; fourth palpomere 46–57 µm long. VR 1.69–1.74, 1.72; VR 2 1.30–1.35 ( Fig. 69 D ). Cu 1 straight. Middle tibia with only 1 apical spine, LR 1 0.53, BV 1 3.67, BV 3 3.17, SV 1 3.46, SV 3 3.17. Anal point ( Fig. 69 G ; Tokunaga 1964 fig. 6c) 25–37 µm long, with setae and microtrichia to apex. Gonocoxite with narrowly triangular inferior volsella reaching to 0.88–0.94 gonocoxite length. Gonostylus 39–43 µm long, with preapical crista dorsalis, megaseta 3–5 µm long. HR 3.05–3.06; HV 3.74–3.91.

Female, pupa and larva

Unknown.

Distribution

This species is known only from Palau.

Figures

FIGURE 69. Pseudosmittia spp., imagines. A–C. P. xanthostola (Kieffer), male, female. A—hypopygium, left dorsal aspect, right ventral aspect; B—female genitalia, ventral view. C—female genitalia, dorsal view. D–G. P. palauensis (Tokunaga). D— wing; E—head; F—virga; G—hypopygium, left dorsal aspect, right ventral aspect.