Docosia rameli Kurina & Ševčík, 2011, sp. nov.
Creators: name: Kurina, Olavi
name: Ševčík, Jan
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mycetophilidae
Docosia
Docosia rameli

description: Docosia rameli sp. nov.
Figures 1 a, 1b, 3a–3f, 4b, 4d, 4f.
Type material. Holotype. 3, GREECE, Central Macedonia, Kerkini lakes area, village Neo Petritsi, Midway site, 41°18’49,8”N 0 23°16’35,6’’E, 750 m. a.s.l., Malaise trap, 26.v–1.vi.2008 (G. Ramel leg.) [IZBE, mounted from alcohol]. Paratypes. 1433 same as holotype; 13, same as holotype, except 12–18.v.2008; 433 5ƤƤ same as holotype, except 2–8.vi.2008; 233 2ƤƤ same as holotype, except 9–15.vi.2008; 233 same as holotype, except 16–22.vi.2008; 13, GREECE, Central Macedonia, Kerkini lakes area, village Kerkini, Krousia Mts., 41°11’32,4”N 0 23°03’59,5’’E, 190 m. a.s.l., Malaise trap, 6–12.vi.2007 (G. Ramel leg.) [233 1Ƥ in SMOC, 233 in BMNH, 2033 6ƤƤ in IZBE, mounted from alcohol]
Description. Male (Fig. 1 a). Body length 2.22–2.61, 2.38 [2.38] mm (n=5).
Head blackish brown with numerous pale setae. Three ocelli, with laterals separated from eye margins by a distance less than their own diameter. Clypeus dark brown, with setae pale. Mouthparts light brownish. Palpus with all segments pale yellow. Scape dark brown, pedicel slightly lighter, all flagellomeres brown. Pedicel with dorsoapical bristle of 2.5 its length. Flagellum with short pale setae. Flagellomeres cylindrical, median flagellomeres about as long as broad, apical flagellomere slightly conical, about twice as long as broad.
Mesonotum blackish brown, pleural parts of thorax brown; bristles and setae on them yellowish white except for two strong brown bristles above the wing bases. Scutellum with two strong brown marginal bristles and with several weaker and paler bristles along the margin. Antepronotum and proepisternum with bristles and setae. Upper part of antepronotum with a strong bristle crossing the neck and with additional weaker bristle, lower part of proepisternum with three strong bristles. Laterotergite with setae, other pleural parts bare. Halteres pale yellow.
Legs. Mid and hind coxae brown, fore coxa brownish at basal fourth to third, otherwise yellow. Fore and mid femora with slight brown markings apicodorsally. Apical third to half of hind femur brown. All trochanters brown. Fore tibia yellow, mid and hind tibiae brown because of numerous dark setae. Basitarsi and successive tarsal segments yellow with numerous brown setae. Mid tibia with 4–5 a, 4–6 d, 1 ad, 2–3 av, 2–3 p and 2–4 pv. Hind tibia with 11–12 a, 9–13 d, 1–3 av. Mid and hind tibiae with two apical black spinules between spurs. Ratio of femur to tibia for fore, mid and hind legs: 1.07–1.30, 1.22 [1.30]; 1.03–1.15, 1.09 [1.14]; 0.78–0.85, 0.83 [0.78]. Ratio of tibia to basitarsus for fore, mid and hind legs: 1.11–1.56, 1.31 [1.11]; 1.45–1.65, 1.54 [1.65]; 1.84–2.14, 1.96 [1.88].
Wing hyaline, length 2.07–2.35, 2.22 [2.21] mm (n=5). Radial veins and r-m brown, other veins paler while mstem and basis of median fork extremely faint. Sc, R4, bM-Cu, m-stem and basal third of cu-stem asetose; C, R1, R5 and r-m setose on both surface; M1, M2, apical two third of cu-stem, CuA1, CuA2 and A1 setose on dorsal surface. Costa reaches 0.41–0.46, 0.44 [0.42] from R5 to M1. Sc ends distinctly in R, before the level of beginning of mstem. Anterior fork begins at the level of R4. Posterior fork begins before anterior fork at level of middle of r-m. R1 1.51–1.91, 1.69 [1.60] times as long as r-m, which is 0.75–1.05, 0.93 [0.95] times as long as m-stem.
Abdomen brown with first two or three segments lighter, nearly yellow, sometimes also fourth segment basally lighter. Terminalia (Fig. 3) light brown. Tergite 9 rounded with deep basal and broad apical incision. Gonocoxite with dark spinules along ventroapical margin, and with two black blunt spines and a digitate process, situated laterally and medially of them, respectively. Gonostylus with two lobes: ventral lobe apically pointed and sclerotized; dorsal lobe apically rounded, wide and curved with strong bristles at lateral margin. Cercus with 7 combs of retinacula.
Female (Fig. 1 b). Body length 2.42–3.20, 2.88 mm (n=5).Coloured as male except that some specimens have posterior part of mid coxa yellowish at apical half and abdomen entirely light brown. Length of wing 2.23–2.63, 2.50 mm (n=5). R1 1.59–1.78, 1.70 times as long as r-m, which is as long as m-stem. Costa reaches 0.40–49, 0.44 from R5 to M1. Ratio of femur to tibia for fore, mid and hind legs: 1.21–1.45, 1.34; 1.11-1.22, 1.16 and 0.84–0.97, 0.90. Ratio of tibia to basitarsus for fore, mid and hind legs: 1.04–1.35, 1.25; 1.35–1.50, 1.43 and 1.77–2.09, 1.92. Terminalia as in figure 4 b, d, f.
Biology. Unknown.
Etymology. The species is named in honour of Mr. Gordon Ramel, who kindly provided us with the fungus gnats collected from the Kerkini Lake of northern Greece: genitive form.
Discussion. Following the key by Laštovka & Ševčík (2006), this species runs to D. sciarina (Meigen, 1830) because of the pubescent laterotergite, Sc ending in R, hind femur partly yellow and coxae mostly dark. However, the male terminalia are completely different from those of D. sciarina but resemble those of D. carbonaria Edwards, 1941. Docosia rameli differs markedly from D. carbonaria in the shape of the ninth tergite, which has an apical incision. The ventral lobe of the gonostylus is pointed and apically sclerotized but without apical spines in D. rameli, while it’s blunt, not sclerotized and bears apical spines in D. carbonaria. Moreover, the ventroapical margin of the gonocoxite has extra strong blunt spines laterally and a digitate median process in D. rameli, both of which are missing in D. carbonaria.
description: Published as part of Kurina, Olavi & Ševčík, Jan, 2011, Three new species of Docosia Winnertz from central and southern Europe (Diptera: Mycetophilidae), pp. 26-36 in Zootaxa 2810 on pages 30-33, DOI: 10.5281/zenodo.203329