Bradysia filigera, 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 : 30-32

Bradysia filigera sp. n.

Figs 4 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).

Description. Male. Head. Brown, antenna unicolorous paler brown, maxillary palpus very pale brown. Eye bridge 2 facets wide. Face, clypeus and maxillary palpus not clearly discernible in the specimen; surface of antennal flagellomeres rather smooth, body of flagellomere 4 ( Fig. 4 A) 3.4x as long as wide, the neck longer than broad, with sparse setosity, the longest setae longer than the width of flagellomere. Thorax. Brown, setae pale. Anterior pronotum with 1 seta. Episternum 1 with 5 setae. Scutum with long dorsocentrals, with some longer and shorter laterals, scutellum with 2 longer and some short setae. Wing. Hyalinous. Partly damaged in the specimen, length about 1.1–1.2 mm. Veins distinct. R1/R 0.30. c/w not measurable in the specimen. r-m shorter than bM. M, CuA, rm and bM non-setose. Legs. Yellow. Coxal setae pale. Apical part of front tibia ( Fig. 4 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. Hypopygium ( Figs 4 C, D). Brown, concolorous with abdomen. Gonocoxa narrow, longer than gonostylus, with sparse setosity. Gonostylus narrow, rather straight, very slightly narrowed towards apex, with the mesial side weakly impressed; with dense apical setosity, without an apical tooth, with 3–4 subapical megasetae. Tegmen longer than broad, with truncate apex, weakly sclerotized, aedeagal teeth not discernible in the specimen.

Discussion. In having a narrow gonostylus without an apical tooth and three or four gonostylar megasetae in one group, Bradysia filigera resembles B. spissa but differs in having all megasetae subequal in size, no single megaseta being much larger than the others, sparse (not dense) setosity on the basal part of the gonocoxa and very long and narrow antennal flagellomeres with sparse and long setosity ( Figs 4 and 12 ). In its narrow gonostylus with a few subapical megasetae and its long antennal flagellomeres, B. filigera can be placed in or near the B. hilaris group in the sense of Menzel and Mohrig (2000).

Etymology. The name is derived from the Latin word filum, thread, and the suffix – gera, bearing, referring to the long setae (sensilla) of the antennal flagellomeres.

Figures

FIGURE 4. Bradysia filigera sp. n. (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.

FIGURE 12. Bradysia spissa sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Part of hypopygium, ventral view. C. Gonostylus, ventral view. Scale 0.1 mm.