Bradysia torosa, Vilkamaa & Suuronen, 2019

Vilkamaa, Pekka & Suuronen, Anna, 2019, Definition of the Bradysia luctifica group (Diptera, Sciaridae), with the description of five new species, Zootaxa 4576 (1), pp. 151-161 : 158-160

Bradysia torosa sp. n.

Fig. 7

Material studied. Holotype male. PAPUA NEW GUINEA, Bismarck Archipelago, New Britain, Yalom , 4°25’ S, 151°45’ E, 1000 m, 22.V.1962, Noona Dan Exped. 61-62. (in ZMUC) . Paratypes. Same data as holotype, 5 males (3 in ZMUC, 2 in MZH) .

Description. Male. Head. Face and antenna concolorous pale brown, maxillary palpus very pale brown. Eye bridge 3–4 facets wide. Face with 50–67 short and fine setae. Clypeus with 8–12 setae. Maxillary palpus with 3 segments; 1 st segment as long as 2 nd segment, 3 rd segment longest; 1 st segment with 9–12 setae, with welldemarcated, small dorsal patch of sensilla; surface of antennal flagellomeres smooth, densely setose, body of 4 th flagellomere 1.7x as long as wide, the neck shorter than wide, the longest setae shorter than the width of flagellomere. Thorax. Dark brown, setae dark and fine. Anterior pronotum with 13–17 setae. Proepisternum with 15–17 setae. Scutellum with 4 slightly longer and some short setae. Wing. Fumose. Length 3.0 mm. Width/length 0.50. Anal lobe large. Veins distinct. stM equally long as fork of M. R1/R 0.75–0.80. c/ w 0.6 –0.7. r-m as long as bM. bM non-setose, r-m non-setose or rarely with 1 seta. Halter yellow and short. Legs. Coxae brown, setae dark. Tibiae and tarsi brown. Fore tibial organ with pale vestiture forming a row. Fore tibial spur longer than the tibial width. Claws without teeth. Abdomen. Brown, setae dark and rather long and strong. Hypopygium ( Fig. 7 ). Dark brown, concolorous with abdomen. Intergonocoxal area rather long, with some long setae, with sclerotized medial stripe. Gonocoxae narrow, basally united (U-shaped), longer than gonostylus, with long and sparse setosity, medial margin sparsely setose, slightly sclerotized, membraneous part with short setae and with microtrichia. Gonostylus narrow, subbasally slightly widened, slightly curved, richly setose, dorsally distinctly excavated, medially with some long setae, apex roundish, with numerous blunt setae, subapically with a dorsal row of spine-like megasetae, without apical tooth. Tegmen conical, laterally sclerotized, with subapical sclerotized structures and apicalsubapical hyalinous tooth-like structures, dorsally without hyalinous apical part, with straight, strongly sclerotized basal apodemes, with large area of strong aedeagal teeth. Aedeagal apodeme short.

Discussion. Bradysia torosa sp. n. differs in some characters from the other species of the group (dark colour, large size, shorter wing vein c) but shares with them the basic structure of the hypopygium, including the dorsally excavated gonostylus, sclerotized medial structures of tegmen, long apodemes of gonocoxa and of tegmen, and we place it tentatively to this group.

Etymology. The name is Latin, torosa , muscular, referring to the robust habitus of the species.

Figures

FIGURE 7. Bradysia torosa sp. n. (A paratype, B, C, holotype). A. Apical part of gonostylus, dorsal. B. Gonostylus, ventral. C. Part of hypopygium, ventral. Scale 0.10 mm.