Bradysia gemellata, Vilkamaa, Pekka, Hippa, Heikki & Mohrig, Werner, 2012

Vilkamaa, Pekka, Hippa, Heikki & Mohrig, Werner, 2012, The genus Bradysia Winnertz (Diptera, Sciaridae) in New Caledonia, with the description of thirteen new species, Zootaxa 3489, pp. 25-44 : 32-33

Bradysia gemellata sp. n.

Figs 5 A–D

Material studied. Holotype male. NEW CALEDONIA, Rivière Bleue N.P., (parc 7), rainforest, 21.vii.1992, Bonnet de Larbogne, Chazeau & Guilbert (in MNHN). Paratypes. 11 males, same data as holotype (1 in MZH, 1 in SMNH, 1 in PWMP, 8 in MNHN); 1 male, Ouinné Valley, 730 m, 22°02' S, 166°28'E, humid forest with araucarians, 27–30.x.1984, Tillier & Bouchet (in MNHN); 1 male NEW CALEDONIA (no further data), 20.xii.1986, Bonnet de Larbogne & Chazeau (in MNHN).

Description. Male. Head. Brown, antenna slightly paler brown, unicolorous but in some specimens scapus and pedicellus yellowish, apical edge of flagellomeral necks slightly darkened, maxillary palpus very pale brown. Eye bridge 3 facets wide. Face with 8–16 scattered longer and shorter setae. Clypeus with 1 seta. Maxillary palpus with 3 palpomeres; palpomere 1 longer than palpomere 3, palpomere 2 shortest; palpomere 1 with 1 seta, with a dorsal patch of sensilla in a shallow depression; surface of antennal flagellomeres rough, body of flagellomere 4 ( Fig. 5 A) 1.65–2.05x as long as wide, the neck shorter than broad, the longest setae shorter than the width of flagellomere. Thorax. Brown, setae pale. Anterior pronotum with 2–5 setae. Episternum 1 with 3–10 setae. Scutum with long dorsocentrals, with some longer and shorter laterals, scutellum with 4 longer and some short setae. Wing. Hyalinous. Length 1.1–1.6 mm. Width/length 0.45–0.50. Veins distinct. R1/R 0.45–0.65. c/ w 0.70 –0.85. r-m and than bM subequal in length. M, CuA, r-m and bM non-setose. Legs. Yellow. Coxal setae pale. Apical part of front tibia ( Fig. 5 B): tibial organ with pale vestiture forming a short row. Front tibial spur slightly longer than the tibial width. Claws without teeth. Abdomen. Setae pale and fine. Hypopygium ( Figs 5 C, D). Brown, concolorous with abdomen. Gonocoxa narrow, longer than gonostylus, mesial margin with sparse setosity. Gonostylus narrow, rather straight, slightly narrowed towards apex, with the mesial side weakly impressed at apical fourth; without an apical tooth, with a pair of subapical megasetae. Tegmen subquadrangular, weakly sclerotized, with a large area of triangular aedeagal teeth.

Discussion. Bradysia gemellata belongs to the Bradysia hilaris group in the sense of Menzel and Mohrig (2000). It is unique among the New Caledonian species of Bradysia in having only two megasetae on the gonostylus. There is fairly wide variation in the size (wing length) of the specimens examined, but there is no doubt that they are conspecific. In its two rather long gonostylar megasetae, B. gemellata resembles the Palaearctic Bradysia bispinifera Mohrig & Krivosheina, 1983 (see Mohrig et al. 1983).

Etymology. The name is Latin, gemellata , doubled, referring to the pair of equal gonostylar megasetae.

Figures

FIGURE 5. Bradysia gemellata sp. n. (A, B paratype, C, D holotype). A. Antennal flagellomere 4, lateral view. B. Apical part of front tibia, prolateral view. C. Part of hypopygium, ventral view. D. Gonostylus, ventral view. Scale 0.1 mm.