Pseudosmittia siamensis, Ferrington Jr & Saether, 2011

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 : 200-201

Pseudosmittia siamensis sp. n.

( Fig. 75 A–E )

Type material: Holotype male, THAILAND: Pattaya , xii.1991, W. Schacht ( ZSM).

Diagnostic characters: The male imago can be distinguished from P. triangula by having a slight apical projection on the anal point, and AR of about 0.9, 8 dorsocentrals and a costal extension of 7 µm.

Etymology: From Siam, the old name for Thailand, and the Latin - ensis, belonging to.

Male imago (n = 1)

All measurements within the range of variation or less than 4 µm different from the range in P. triangula , all ratios within 0.02 of the variation in P. triangula , with the following exceptions or additions: Wing length/length of profemur 2.95. AR 0.91, terminal flagellomere 242 µm long, no strong apical seta. Dorsocentral setae 8, scutellum with 4 setae. Costal extension ( Fig. 75 A ) 7 µm long, with false vein extending 160 µm long, postcubitus forked. Front femur 252 µm long, ta 1 of front leg 162 µm long, ta 2 63 µm long, ta 3 45 µm long; ta 1 of hind leg 189 µm long. BV 1 4.05, BV 2 3.76, SV 2 3.33. Anal point ( Fig. 75 E ) triangular with apical projection; tergite IX including anal point with 16 setae; laterosternite IX with 2 setae. Gonostylus 51 µm long. HR 2.18, HV 2.66.

Female, pupa and larva

Unknown.

Distribution

The species in known only from the type locality, a resort city in Thailand .

Figures

FIGURE 75. Pseudosmittia siamensis sp. n., male. A—wing; B—head; C—cibarial pump; D—virga; E—hypopygium.