Hydrosmittia tenuistylata, 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 : 111

Hydrosmittia tenuistylata sp. n.

( Fig. 37 )

Type material: Holotype male, TANZANIA: Tanga, West Usambara Mountains, Mazumbai , xi 1990, ZMBN's Tanzania Expedition ( ZMBN Type No. 437).

Diagnostic characters: The reduced inferior volsella and the attenuate Gonostylus together with the apical teeth on the phallapodeme will separate the male imago from other members of the genus.

Etymology: From Latin, tenuis, slender, stylus, style, and – atus, equipped with, referring to the attenuate gonostylus.

Male imago (n = 1)

All measurements and ratios within the range of variation of H. soelii with the following exceptions and additions: AR 1.12; hypopygium ( Fig. 37 E ) with anal point folded, but apparently not pointed; tergite IX with 8 setae; virga ( Fig. 37 D ) 27 µm long, 0.4 times as long as gonostylus; gonocoxite 114 µm long; phallapodeme with two apical teeth resembling those in H. togadistalis Sasa , but barely sclerotized; inferior volsella weak, slightly hooked, reaching to 0.68 gonocoxite length; accessory lobe reaching to 0.80 gonocoxite length.

Distribution

The species is only known from the type locality, near a mountain stream in Tanzania .

Figures

FIGURE 37. Hydrosmittia tenuistylata sp. n., male. A—wing; B—head; C—antepronotum; D—virga; E—hypopygium, left dorsal aspect, right ventral aspect.