Docosia kerkini, Kurina, Olavi & Ševčík, Jan, 2011

Kurina, Olavi & Ševčík, Jan, 2011, Three new species of Docosia Winnertz from central and southern Europe (Diptera: Mycetophilidae), Zootaxa 2810, pp. 26-36 : 33-35

Docosia kerkini sp. nov.

Figures 1 e, 5a– 5f.

Type material. Holotype. 3, GREECE, Central Macedonia, Kerkini lakes area, village Vironia, Beles site, 41°17’19,5”N 0 23°12’18,4’’E, 590 m. a.s.l., Malaise trap, 11–17.iv.2005 (G. Ramel leg.) [ IZBE, mounted from alcohol].

Description. Male ( Fig. 1 e). Body length 3.38 mm (n=1).

Head dark brown with numerous pale setae. Three ocelli, with laterals separated from eye margins by a distance less than their own diameter. Clypeus brown, with setae pale. Mouthparts light brownish. Palpus with first two segments brownish and remaining segments pale yellow. Scape and pedicel dark brown, all flagellomeres brown. Flagellum with short pale setae. Flagellomeres cylindrical, median flagellomeres about 1.4 times as long as broad, apical flagellomere conical, three times as long as broad.

All parts of thorax brown, mesonotum slightly darker than pleural parts. All bristles and setae yellowish white. Scutellum with numerous setae, including marginal bristles; latter not arranged in distinct pairs. Antepronotum and proepisternum with bristles and setae. Laterotergite and other pleural parts bare. Halteres pale yellow.

Legs. Fore coxae brown at basal third, mid and hind coxae brown at basal half. Femora yellow, fore femur darkened dorsally and ventrally and hind femur apically. All trochanters brown. Tibiae and basitarsi yellow, successive tarsal segments seem more brownish because of dense setae. Mid tibia with 5 a, 4 d, 4 av and 3 p. Hind tibia with 12 a, 11 d, 3 av. Mid and hind tibiae with two apicoventral spinules between spurs. Ratio of femur to tibia for fore, mid and hind legs: 1.1; 1.19; 0.86. Ratio of tibia to basitarsus for fore, mid and hind legs: 1.15; 1.33; 1.87.

Wing hyaline, length 3.05 mm (n=1). Radial veins and r-m brown, other veins paler while m-stem faint. Sc, R4, bM-Cu, m-stem and basal half of cu-stem asetose; C, R1, R5 and r-m setose on both surface; M1, M2, apical half of cu-stem, CuA1, CuA2 and A1 setose on dorsal surface. Costa reaches 0.37 from R5 to M1. Sc distinctly ends in R, before the level of beginning of m-stem. Anterior fork begins a little before at the level of R4. Posterior fork begins before anterior fork at level of middle of r-m. R1 2.38 times as long as r-m, which is as long as m-stem.

Abdomen brown with second and third segments yellowish laterally and ventrally. Terminalia ( Fig. 5 ) brown. Tergite 9 very wide apically; apical margin broadly concave. Ventroapical margin of gonocoxite with flange bearing two submedian humps with black spine-like blunt bristles. Gonostylus simple with row of blunt teeth along medioventral margin. Cercus with 13 combs of retinacula.

Female. Unknown.

Biology. Unknown.

Etymology. The species is named after the type locality in the Kerkini Lake area in northern Greece: noun in apposition.

Discussion. Following the key by Laštovka & Ševčík (2006) the species runs to couplet 15, because of the bare laterotergite and the hind coxa with dark basal half. All three species included in the couplet, viz. D. nigra Landrock, 1928 , D. diutina Plassmann, 1996 and D. pannonica Laštovka & Ševčík, 2006 , have, however, different coloration and outline of the male terminalia. The new species resembles D. moravica Landrock, 1916 and D. pasiphae Chandler, Bechev & Caspers, 2006 in the simple gonostylus with blunt teeth, which are situated more distally in these species (cf. Laštovka & Ševčík 2006: Fig. 11; Chandler, Bechev & Caspers, 2006: Figs 36-39) while forming a row along medioventral margin of gonostylus in the new species ( Fig. 5 c). The spine-bearing hump along the ventroapical margin of the gonocoxite is unique feature and resembles somewhat that in species with combs within the margin, viz. D. lastovkai Chandler, 1994 , D. melita Chandler & Gatt, 2000 and D. cephaloniae Chandler, Bechev & Caspers, 2006 .

Figures

FIGURE 1. Habitus photos of new Docosia species. a, b, Docosia rameli sp. nov. (a = male, b = female); c, d, Docosia muranica sp. nov. (c = male, terminalia detached, d = female, terminalia detached); e, Docosia kerkini sp. nov. (male, terminalia detached). Scale bar = 1 mm.

FIGURE 5. Docosia kerkini 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. Scale bar = 0.1 mm.