Trichosiopsis albescens
Ordo: Diptera
Familia: Sciaridae
Genus: Trichosiopsis
Name
Trichosiopsis albescens (Mohrig & Mamaev, 1987) – Wikispecies link – ZooBank link
- Trichosia (Leptosciarella) albescens Mohrig & Mamaev, 1987[1]: 574-575, fig. 3
- Leptosciarella (Leptosciarella) albescens (Mohrig & Mamaev, 1987)[2]: 77-78, fig. 26
Type material
Holotype: ♂, 13.06.1964, leg. Mamaev, PWMP 4027
Type locality
Russia, Tuva, Ishtii Khem
Description (male)
Head. Eye bridge 3–4 rows of facets. LW-index of 4th antennal flagellar segment 1.65–1.9; neck 0.26–0.36 of segment width; Transition of basal part to neck pronounced. Colour of neck unicolour. Antennal hairs shorter than segment width; dense; salient. Palps bright, or darkened; short; palpomeres 3. First palpomere of normal shape; with 3 bristles; with only some sparse sensillae. Second palpomere shortly oval. Third palpomere longer than first segment. Thorax. Colour bright brown, or reddish. Notum unicolour. Thoracic setae normal; bright. Mesonotum with some weaker central bristles. Posterior pronotum bare. Mesothoracic sclerites bare. Legs. Colour yellow. Hind coxae of same colour as femora. Hairs on fore coxae bright. Front tibia apically with a patch of setae. Front tibial organ dark. Front tibial organ not bordered. Tibial setae on hind legs weak, inconspicuous. Tibial spurs of equal length. Claws untoothed. Wings. Wings slightly darkened; of normal shape. Wing membrane without macrotrichia. Wing venation weak, with faint m-base. M-fork of normal shape. R1 inserting clearly before base of m-fork; posterior veins bare; bM bare; r-m bare; bM:r-M 0.71–0.85; st-Cu:bM 0.24–0.34; r1:r 0.9–1.2; C:w 0.45–0.55. Halteres dark; of normal length. Abdomen. Abdominal setae weak; dorsally white; ventrally white. Hypopygium concolour with abdomen; 0.74–0.85 × longer than wide. Base of gonocoxites bare, or with normal, weak hairs; gonocoxites forming an inverse V; inner margin of gonocoxites normally U-shaped; inner membrane of hypopygium scarcely setose; elongated setae on valves of hypopygium absent. Gonostylus elongate; 2.2–2.4 × longer than wide; Inner margin concave; apex equally rounded. Apical tooth present; 1.83–2 × longer than broad; normal. Awl-like setae short; on inner side of gonostyles absent, or apically present. Megasetae on inner part of gonostylus absent. Whiplash-hair absent. Tegmen 0.55–0.67 × longer than broad; trapezoid, or laterally emarginate; normal; Central process absent. Length of aedeagus/hypopygium 20–29 %; Aeadeagal apical structure present. Measurements. Body size 2–2.5 mm. Hind tibia 0.82–1 mm. Wing length 1.8–2.05 mm.
Diagnosis
Trichosiopsis albescens is one of the smallest species in the genus. By the white body hairs, the apically rounded gonostylus and the bare posterior wing veins it resembles the species around Trichosiopsis nudinervis and Trichosiopsis truncata. The species is easily distinguished by the small size and the very short and stout awl-like setae.
Discussion
The species is currently only known by the holotype.
Etymology
lat. albescens = getting white; making reference to bright colour of the body ant the hairs.
Distribution
Russia[1].
Images
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References
- ↑ 1.0 1.1 Mohrig, W.; Mamaev, B.; Krivosheina, N. 1987: Beiträge zur Kenntnis der Trauermücken der Sowjetunion (Diptera, Sciaridae) Teil XI. Neue Arten aus der zentral-asiatischen autonomen Sowjetrepublik Tuwa. Zoologische Jahrbücher, Abteilung für Systematik, Ökologie und Geographie der Tiere, 114(1), 91–104.
- ↑ Mohrig, W.; Menzel, F. 1997: Revision der paläarktischen Arten von Trichosia Winnertz sensu Tuomikoski, 1960 (Diptera, Sciaridae). – Teil II. Gattungen Leptosciarella Tuomikoski, 1960 und Trichodapus gen. nov. Studia dipterologica, 4(1), 41–98.
