Bradysia quercina
Ordo: Diptera
Familia: Sciaridae
Genus: Bradysia
Name
Bradysia quercina Menzel & Köhler, 2014 – Wikispecies link – ZooBank link
- Bradysia quercina Menzel & Köhler, 2014[1]: 359, figs 1-5
Type material
Holotype ♂, canopy fogging, 2.7.2011, leg. K. H. Thunes in SDEI
Type locality
Norway, Telemark, Drangedal, Djupedal, Henseid, 59.053°N 09.222°E
Barcoded material studied
| Stadium | Country | Province | Locality | Habitat | Method | Date | Collector | Collection Number | Collection | Latitude | Longitude | Elevation (m) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 ♂ | Norway | Oppland | Sør-Aurdal, Moldberget E | netted | 03.06.2014 | Heller, K. | bf-sci-00194 | NHMO | 60.62 | 9.89 | 308 |
Description (male)
Head. Eye bridge 2–3 rows of facets. Antenna unicolour. LW-index of 4th flagellomere 1.4–2.2; neck 0.2–0.4 × segment width; Transition of basal part to neck pronounced. Colour of neck unicolour. Antennal setae shorter than segment width; of normal strength; dense. Sensillae present. Antennal setae salient. Palpus darkened; of normal length; palpomeres 3. First palpomere of normal shape; with 4–6 bristles; with delimited sensillary field. Second palpomere short, oval. Third palpomere as long as first segment. Thorax. Colour brown. Notum unicolour. Thoracic setae normal; brown. Posterior pronotum bare. Mesothoracic sclerites bare. Legs. Colour yellow, or yellow-brown. Hind coxa of same colour as femora. Hairs on fore coxa bright. Front tibia apically with a distinct, delimited comb. Front tibial organ bright. Tibial comb undivided. Tibial comb with 6–7 bristles. Front tibial organ not bordered. Tibial setae on hind legs weak, inconspicuous. Tibial spurs of equal length. Claws untoothed. Wing. Wing slightly darkened; of normal shape. Wing membrane without macrotrichia. Wing venation weak, with faint stM. M-fork of normal shape. R1 ending clearly before base of m-fork; posterior veins bare; bM bare; r-m bare; bM:r-M 0.95–1.15; st-Cu:bM 0.7–0.95; R1:R 0.65–0.85; c:w 0.66–0.76. Halter darkened; of normal length. Abdomen. Abdominal setae weak. Abdominal setae sparse. Tergal setae white; sternal setae white. Hypopygium concolour with abdomen; 0.55–0.67 × longer than wide. Base of gonocoxites with normal, weak hairs; gonocoxites narrowly separated; inner margin of gonocoxites normally U-shaped; inner membrane of hypopygium bare; elongated setae on gonocoxites absent. Gonostylus elongate; 2.95–3.2 × longer than wide; Inner margin straight; apex equally rounded. Apical tooth dorsally present; as long or longer than subapical megasetae; 3–4 × longer than broad; strong. Apical tooth without internal structure. Awl-like setae absent. Subapical megasetae present. Number of megasetae 9–11; megasetae thick; megasetae straight; megasetae in one group. Position of basalmost megaseta 16–26 % from top. Whiplash-hair absent. Tegmen 0.75–0.96 × longer than broad; equally rounded; without special features; Central process absent. Length of ejaculatory apodeme/hypopygium 9–15 %; Aeadeagal apical structure present. Field with aedeagal teeth absent. Measurements. Body size 2–2.5 mm. Hind tibia 0.76–0.95 mm. Wing length 1.8–2.5 mm.
Diagnosis
Bradysia quercina is similar to Bradysia bellstedti and Bradysia parvifinis. For a comparison see under the latter.
DNA Barcoding
The COI sequence is assigned to BIN BOLD:ACS3193 (n=1, K2P: 11.31%).
Discussion
The type series of Bradysia quercina is not homogenous with respect to the shape of the flagellomeres and the colour of the legs. The importance of even minor differences for the separation on of cryptic species might be a hint, that there are in fact more than one species involved. The only barcoded specimen from Norway is matching with the holotype and belongs to the variant with longer flagellomeres and brighter legs. Further barcoding of the other variant, fig. 7 in Heller et al. (2015)[2] and known from Sweden and Switzerland, must show, whether it is conspecific or not.
The nearest neighbours of B. quercina are Bradysia laurentia from Canada and Bradysia parvifinis at a distance of 11.66%.
Etymology
The species was named after the genus of the tree (Quercus), where the holotype was collected.
Distribution
Italy[1], Norway[1], Sweden[1], Switzerland[1].
Images
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References
- ↑ 1.0 1.1 1.2 1.3 1.4 Köhler, A.; Menzel, F.; Thunes, K.H.; Søli, G.E.E. 2014: Black Fungus Gnats (Diptera: Sciaridae) in oak canopies: description of Bradysia quercina Menzel & Köhler spec. nov. and new records for Norway. Studia dipterologica, 20(2), 325–331.
- ↑ Heller, K.; Hippa, H.; Vilkamaa, P. 2015: Taxonomy of Bradysia Winnertz (Diptera, Sciaridae) in the Northern Holarctic, with the description of four new species. European Journal of Taxonomy, 122. doi: 10.5852/ejt.2015.122.
