Docosia bartaki, Kurina, Olavi & Ševčík, Jan, 2012

Kurina, Olavi & Ševčík, Jan, 2012, Notes on Docosia Winnertz (Diptera: Mycetophilidae), with description of six new species from Central Asia and the first generic record from the Afrotropical region, Zootaxa 3570, pp. 25-40 : 28-30

Docosia bartaki sp. nov.

Figure 3 .

Type material. Holotype. 3, UZBEKISTAN, Amankutan, pasture, 39.19 N 66.55 E, 1300 m a.s.l., 23.v.1989 (M. Barták leg.) [ SMOC, glued to a triangular card point]. Paratypes. 233, the same data as holotype [ IZBE, MBPC, glued to a triangular card point].

Description. Male. Body length 2.35–2.55, 2.45 [2.45] mm (n=3).

Head black, slightly pruinose with numerous pale setae. Three ocelli, with laterals separated from eye margins by a distance less than their own diameter. Clypeus brown, with pale setae. Mouthparts brown. Palpus light brown. Scape dark brown, pedicel brown with lighter apex, flagellomeres brown except first flagellomere basally lighter and all with short pale setae. Flagellomeres cylindrical, median flagellomeres about 1.6 times as long as broad, apical flagellomere conical, 2.6 times as long as broad at base.

All parts of thorax black with bristles and setae yellowish white. Mesonotum slightly pruinose. Scutellum with numerous setae, including a pair of marginal bristles and several weaker bristles along the margin. Antepronotum and proepisternum with bristles and setae. Upper part of antepronotum with two strong bristles, one of them crossing the neck. Laterotergite setose, other pleural parts bare. Halteres pale yellow.

Legs. All coxae entirely blackish brown. All trochanters brown. Forefemur yellow except basally slightly infuscated and dorsal and ventral margin narrowly brown. Mid- and hind femora light brown with laterally somewhat lighter. Foretibia yellow, apically thickened; mid- and hind tibiae brownish. Mid- and hind tibia with two apical black spinules between spurs. First tarsal segments yellowish, successive tarsal segments seem more brownish because of dense setae. Midtibia with 3 d, 3–4 a and 2–3 pv. Hind tibia with 14–16 d, 3–4 a, 5–6 av, 10 p and 4 pv. Ratio of femur to tibia for fore-, mid- and hind legs: 1.12–1.44, 1.27 [1.25]; 1.04–1.19, 1.3 [1.17]; 0.82–0.95, 0.9 [0.93]. Ratio of tibia to basitarsus for fore-, mid- and hind legs: 1.43–1.54, 1.45 [1.54]; 1.50–1.55, 1.53 [1.53]; 1.90–1.94, 1.92 [1.91].

Wing hyaline, length 2.52 mm (n=3). Costa, radial veins and r-m brown, other veins paler and M-stem very faint. Sc, R4, bM-Cu, M-stem and basal half of A1 bare; C, R1, R5 and r-m setose on both surfaces; M1, M2, cu-stem, CuA1, CuA2 and apical half of A1 setose on dorsal surface. Costa reaches 0.26–0.29, 0.283 [0.28] from R5 to M1. Sc ending in R, before the level of origin of M-stem. Anterior fork begins beyond the level of R4. Posterior fork begins before anterior fork at level of middle of M-stem. R1 2.29–2.43, 2.37 [2.29] times as long as r-m, which is 0.88 times as long as M-stem.

Abdomen brown with sternites somewhat lighter. Terminalia ( Fig. 3 ) dark brown. Tergite 9 subcircular, with deep basal incision. Ventroapical margin of gonocoxite deeply emarginated with a finger-like medial process and spines laterally. Gonostylus bifid: medially swollen ventral lobe bears an apical spine and medially bent dorsal lobe bears three short spines basally. Cercus with 8 combs of retinacula.

Female. Unknown.

Biology. Unknown.

Etymology. The species is named in honour of Prof. Miroslav Barták (Prague, Czech Republic) who collected the type material: genitive form.

Discussion. Within the Central Asian species D. bartaki forms a group with D. sogetensis and D. koyentagi because of the setose laterotergite. It resembles D. sogetensis in having entirely dark coxae and a bifid gonostylus. However, D. bartaki has the dorsal lobe of the gonostylus with basal spines on medial margin while D. sogetensis has a subapical tubercle. The medially swollen ventral lobe of the gonostylus has an apical spine while in D. sogetensis , it is without apical spine and bent posteriorly. The ventroapical margin of the gonocoxite in D. bartaki is deeply emarginated bearing spines while the margin is wavy with spines on submedial processes in D. sogetensis (cf. Kurina 2006: fig. 4b). In the key to European species ( Laštovka & Ševčík 2006), D. bartaki and D. sogetensis would run to D. carbonaria Edwards, 1941 , a mainly Mediterranean species which forms a group of several closely related species (cf. Chandler et al. 2006).

Figures

FIGURE 3. Docosia bartaki sp. nov., male terminalia. a, lateral view; b, posterior view; c, ventral view of gonostylus; d, dorsal view of tergite 9; e, dorsal view of cerci; f, ventral view of aedeagal complex; g, lateral view of aedeagal complex. Scale bar = 0.1 mm. Abbreviations: aed = aedeagus; gc = gonocoxite; gc vam = ventroapical margin of gonocoxite; gst vl = ventral lobe of gonostylus; gst dl = dorsal lobe of gonostylus; par = paramere; ret = combs of retinacula.