Docosia blagoderovi, 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 : 30-32

Docosia blagoderovi sp. nov.

Figure 4 .

Type material. Holotype. 3, TURKMENISTAN, Kugitang Mts., 50 km NE Carsanga, 1500 m a.s.l. sweeping, 28.iv.1989 (V. Blagoderov leg.) [ BMNH, glued to a triangular card point]. Paratype. 3, same as holotype except 29.iv.1989 (V. Blagoderov leg.) [ BMNH, glued to a triangular card point].

Description. Male. Body length 3.2–3.3, 3.23 [3.3] mm (n=2).

Head black, 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 brown with two apical segments yellow. Scape dark brown, pedicel somewhat lighter, flagellomeres brown and with short pale setae. Flagellomeres cylindrical, median flagellomeres about 2.6 times as long as broad, apical flagellomere cylindrical, 3.7 times as long as broad at base.

All parts of thorax black with yellowish white bristles and setae. Mesonotum slightly pruinose. Scutellum with numerous setae, including two pairs of marginal bristles, one of them considerably stronger 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 and other pleural parts bare. Halteres yellow.

Legs. All coxae yellow with basal thirds brown. All trochanters brown. Forefemur yellow except ventral margin narrowly brown. Mid- and hind femora yellow. All tibiae yellow. First tarsal segments yellowish, successive tarsal segments seem more brownish because of dense setae. Midtibia with 4 d, 4 a and 6–7 pv. Hind tibia with 7–10 d, 12 a, and 3 av. Ratio of femur to tibia for fore-, mid- and hind legs: 1.15–1.16, 1.16 [1.16]; 0.93–0.97, 0.95 [0.93]; 0.78–0.93, 0.86 [0.78]. Ratio of tibia to basitarsus for fore-, mid- and hind legs: 1.19–1.27, 1.23 [1.19]; 1.27–1.40, 1.34 [1.27]; 1.46–1.76, 1.61 [1.46].

Wing hyaline, length 3.36–3.75, 3.56 [3.75] mm (n=2). Costa, radial veins and r-m brown, other veins paler and M-stem faint. Sc, R4, bM-Cu, M-stem, basal half of cu-stem and basal third of A1 bare; C, R1, R5 and r-m setose on both surfaces; M1, M2, apical half of cu-stem, CuA1, CuA2 and apical two third of A1 setose on dorsal surface. Costa reaches 0.24–0.27, 0.26 [0.27] from R5 to M1. Sc distinctly ends in R, at the middle of bM-Cu. Anterior fork begins slightly before the level of R4. Posterior fork begins before anterior fork at level of origin of r-m. R1 2.3–2.5, 2.4 [2.3] times as long as r-m, which is about as long as M-stem.

Abdomen brown with pale setosity, sternites somewhat lighter. Terminalia ( Fig. 4 ) dark yellow. Tergite 9 slightly elongated with almost straight apical margin lacking basal incision. Ventroapical margin of the gonocoxite with a basally wide and tapering medial process bearing apically bifid megasetae, and with lateral narrow extensions. The gonostylus with a geniculate subapical spine and with four spines on a common basal body on the ventral surface. Cercus with 13 combs of retinacula.

Female. Unknown.

Biology. Unknown.

Etymology. The species is named in honour of Dr. Vladimir Blagoderov (BMNH, United Kingdom), the collector of the type material: genitive form.

Discussion. Docosia blagoderovi resembles D. turkmenica in the outline of the ventroapical margin of gonocoxite. Both species have a ventromedial projection with bifid megasetae. However, the projection of D. blagoderovi is basally wider and the ventrolateral extensions of gonocoxite are much narrower than in D. turkmenica . These two species belong to a group of almost indistinguishable Docosia species having a bare laterotergite and mostly yellow legs. The structure and peculiar setation on the posterior margin of the gonocoxites suggest their possible relationships with D. distributa sp. nov. and related Western Palaearctic species (see discussion under D. distributa ).

Figures

FIGURE 4. Docosia blagoderovi sp. nov., male terminalia. a, lateral view; b, posterior view; c, ventral view of gonostylus; d, dorsal view of tergite IX; e, dorsal view of cerci; f, ventral view of aedeagal complex; g, lateral view of aedeagal complex. Scale bar = 0.1 mm.