Pseudosmittia dupla (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 : 207-209

Pseudosmittia dupla (Tokunaga)

( Fig. 79 A, B )

Smittia dupla Tokunaga, 1964: 522 , pro parte.

Pseudosmittia dupla (Tokunaga) ; Cranston and Martin (1989: 262).

Material examined: MARSHALL ISLANDS: Ailinglapalap Island , Ailinglapalap Atoll , holotype male, 26.x.1953, J. W. Beardsley ( USNM 66538 )

Diagnostic characters: The male imago is separable from other members of the group by having a rounded accessory lobe partly underneath the inferior volsella and an AR of 0.30.

Male imago (n = 1)

All measurements and ratio within the range of variation of P. forcipata (p. 298) with the following exceptions and additions: Wing ( Fig. 79 A ) length 0.76 mm. Wing length/length of profemur 2.40. AR 0.30. Terminal flagellomere 101 µm long, without strong apical seta ( Tokunaga 1964 fig. 5b). Dorsocentrals 20. VR 1.73, VR 2 1.33. Cu 1 straight. Middle tibia with only one spur, hind tibia spurs 48 µm and 22 µm long; comb with 12 setae, 26– 48 µm long. BV 1 4.27, BV 3 3.12, BR 1 2.0, BR 2 2.3, BR 3 3.2. Anal point ( Fig. 79 B ; Tokunaga 1964 fig. 6d), 50 µm long, with about 12 lateral setae. Virga 11 µm long. Gonocoxite ( Fig. 79 B ) with triangular inferior volsella covering rounded accessory lobe, both reaching 0.83 gonocoxite length. HR 2.28.

Female, pupa and larva

Unknown.

Remarks

The female associated by Tokunaga (1964: 522) with Pseudosmittia dupla cannot belong to this species since it has only 5 dorsocentrals, no postcubital fork and quite different leg ratios. It is described above as Pseudosmittia tokunagai sp. n. (p 000).

Distribution

The species is known only from the Marshall Islands.

Figures

FIGURE 79. Pseudosmittia spp., male. A, B, P. dupla (Tokunaga). A—wing; B—hypopygium, left dorsal aspect, right ventral aspect. C. P. littoralis (Tokunaga), hypopygium. (C from Tokunaga 1936).