Trichosiopsis alba
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BibTeX: @article{Heller2012VeröffentlichungendesMuseumsfürNaturkundeChemnitz35, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Heller2012Veröffentlichungen des Museums für Naturkunde Chemnitz35">{{Citation |
Ordo: Diptera
Familia: Sciaridae
Genus: Trichosiopsis
Name
Trichosiopsis alba (Heller, 2012) – Wikispecies link – ZooBank link
- Leptosciarella (Leptosciarella) alba Heller, 2012[1]: 97-98, fig. 3
Type material
Holotype ♂, no 7808 in SDEI, Malaise trap, leg. S. Blank & C. Kutzscher, 18.-28.08.1997
Type locality
Sweden, Pite lappmark, Moskosel, 65°54' N 19°13' E
Paratype
Sweden: 1 ♂ Hälsingland, Stensjön-Lomtjärn, pine forest near bog, Malaise trap, Swedish Malaise Trap Project, 11.-25.08.2004, PKHH 6769.
Further material studied
Austria: 1 ♂ Styria, National Park "Gesäuse", Schwarzlacken, 1.560 m, fountain, sweep netting, Haseke & Remschak, 20.10.2012, PKHH 8224.
Description (male)
Head. Eye bridge 5 rows of facets. LW-index of 4th antennal flagellar segment 2.4–2.6; neck 0.255–0.29 of segment width; Transition of basal part to neck pronounced. Colour of neck unicolour. Antennal hairs shorter than segment width; dense; salient. Palps darkened; long; palpomeres 3. First palpomere elongate; with 2–4 bristles; with only some sparse sensillae. Second palpomere elongate. Third palpomere as long as first segment. Thorax. Colour brown, or reddish. Notum unicolorous. Thoracic setae normal; bright. Mesonotum with some weaker central bristles. Posterior pronotum bare, or setose. Postpronotal setae 0–10; strong. Laterotergite bare. Legs. Colour yellow. Hind coxae of same colour as femora, or darkened. Hairs on fore coxae bright. Front tibia apically with a patch of setae. Front tibial organ bright. Front tibial organ not bordered. Tibial setae on hind legs normal, shorter than tibial width. 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 long and slender, or of normal shape. R1 inserting at or slightly before base of m-fork; posterior veins with macrotrichia; stM mainly with macrotrichia; cuA1 and cuA2 mainly with macrotrichia; bM setose; r-m mostly setose; bM:r-M 0.75–0.95; st-Cu:bM 0.45–0.6; r1:r 1.25–1.5; C:w 0.6–0.75. Halteres dark; of normal length. Abdomen. Abdominal setae strong and dense, or weak; dorsally white; ventrally white. Hypopygium concolour with abdomen; 0.6–0.8 × longer than wide. Base of gonocoxites with strong setae; gonocoxites broadly separated; inner margin of gonocoxites narrowly U-shaped; inner part of hypopygium scarcely setose, or densely setose; elongated setae on valves of hypopygium absent, or present. Gonostylus elongate; 2.6–2.8 × longer than wide; Inner margin straight; apex equally rounded, or with one obtuse angle. Apical tooth present; 1.5–1.85 × longer than broad; normal. Awl-like setae normal, or short; on inner side of gonostyles present apically. Megasetae on inner part of gonostylus absent. Whiplash-hair absent. Tegmen 0.6–0.9 × longer than broad; rectangular with rounded edges; normal, or with dark and strengthended edges; Central process absent. Length of aedeagus/hypopygium 20–30 %; Aeadeagal apical structure present. Measurements. Body size 3–3.6 mm. Hind tibia 1.75–1.88 mm. Wing length 3.1–3.4 mm.
Diagnosis
Leptosciarella alba might appear as a variant of Leptosciarella trochanterata (Zetterstedt, 1851). However, the currently known specimens significantly differ in some characters, so that the description as a distinct species seemed to be justified. Contrarily to Le. trochanterata Le. alba has completely white hairs on thorax and abdomen which is also extending to the tibial organ. Furthermore the setae at the hind tibiae are not conspicuously long as it is the case in Le. trochanterata, and the gonostyli are not elongate and less tapered apically. Leptosciarella subcoarctata is another species with completely white hairs. But that species can be distinguished by the shorter antennal segments and basally only slightly separated gonocoxites.
DNA Barcoding
The COI sequence is assigned to BIN BOLD:ACM3205 (n=1, K2P: 11.4%).
Etymology
albus lat. = white; referring to the bright body hairs.
Distribution
Austria, Sweden.
Images
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References
- ↑ Heller, K. 2012: Fünf neue europäische Arten von Trauermücken (Diptera, Sciaridae) aus dem Artenkreis um Leptosciarella pilosa. Veröffentlichungen des Museums für Naturkunde Chemnitz, 35, 91–102.
