Bradysia gibbosa, 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 : 33-34

Bradysia gibbosa sp. n.

Figs 6 A–D

Material studied. Holotype male. NEW CALEDONIA, Rivière Bleue N.P., 150 m, humid forest on alluvials, Malaise trap, 22.iv–6.v.1987, Bonnet de Larbogne, Chateau & Tillier (in MNHN). Paratypes. 2 males, same data as holotype (in MNHN); 3 males, Rivière Bleue N.P, humid forest, 15–29.ix.1986, Bonnet de Larbogne, Chateau & Tillier (in MZH, in SMNH, in MNHN); 2 males, Rivière Bleue N.P., (parc 6), rainforest, 20.i.1993, Bonnet de Larbogne, Chazeau & Guilbert (in PWMP and MNHN); 1 male, Rivière Bleue N.P., (parc 7), rainforest, 16.vii.1992, Bonnet de Larbogne, Chazeau & Guilbert (in MNHN); 3 males, same data but 21.vii.1992 (in MNHN); 3 males, Sud du Grand Lac, 22°16'31''S, 160°54'00''E, 240 m, maquis haut, 14.x.1985, Bouchet (in MNHN); 3 males, same data as previous but 280 m, maquis (in MNHN); 1 male, Mont Panié, 140 m, Malaise trap, 7–18.xii.1990, Baylac & Bourgoin (in MNHN).

Description. Male. Head. Brown, antenna unicolorous paler brown, maxillary palpus very pale brown. Eye bridge 2–3 facets wide. Face with 7–33 scattered longer and shorter setae. Clypeus with 2–4 setae. Maxillary palpus with 3 palpomeres; palpomere 3 longer than palpomere 1, palpomere 2 shortest; palpomere 1 with 2–3 setae, with a dorsal patch of sensilla in a shallow depression; surface of antennal flagellomeres rough, body flagellomere 4 ( Fig. 6 A) densely setose, 2.15–3.45x as long as wide, the neck shorter than broad, the longest setae much shorter than the width of flagellomere. Thorax. Brown, setae dark. Anterior pronotum with 2–5 setae. Episternum 1 with 3–10 setae. Scutum with long dorsocentrals, with some longer and shorter laterals, scutellum with 2 longer and some short setae. Wing. Hyalinous. Length 1.6–2.1 mm. Width/length 0.40–0.45. Veins distinct. R1/R 0.70–1.05. c/ w 0.65 –0.80. r-m and bM subequal in length. M, CuA, r-m and bM non-setose. Legs. Yellow. Coxal setae pale. Apical part of front tibia ( Fig. 6 B): tibial organ with pale vestiture forming a rather long row. Front tibial spur slightly longer than the tibial width. Claws without teeth. Abdomen. Setae dark and long. Hypopygium ( Figs 6 C, D). Brown, concolorous with abdomen. Gonocoxa longer than gonostylus, mesial margin and ventral side with rather rich setosity, basoventrally with mesial area of densely placed setae. Gonostylus ovale, strongly narrowed towards apex, with the mesial side weakly impressed; with a dense apical setosity, without an apical tooth, with three strong blunt apical megasetae. Tegmen apically truncate, weakly sclerotized, with a large area of large aedeagal teeth.

Discussion. Bradysia gibbosa might be placed in the B. hilaris group in the sense of Menzel and Mohrig (2000). The species differs from all other New Caledonian species of Bradysia in having a strongly towards the apex narrowed gonostylus with three long and blunt megasetae.

Etymology. The name is derived from the Latin word gibbosa , humped, referring to the bent margins of the gonostylus.

Figures

FIGURE 6. Bradysia gibbosa 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.