Trichosia (Trichosia) montaclaria, Sutou & Menzel, 2025

Trichosia (Trichosia) montaclaria sp. nov.

Fig. 10 A ‒ D View Figure 10

Type material.

Holotype. JAPAN • ♂; Honshu, Yamanashi Pref., Koshu, Hikawa-rindou ; 35°42'35"N, 138°49'42"E; alt. 1350 m; 26 June 2007; H. Kawai leg., sweep-net; NSMT. GoogleMaps

Description.

Male. Head: Eye bridge 4‒5 facets wide. Prefrons with setae and clypeus bare. Scape brown with 3 setae, pedicel brown with about 8 setae; flagellomeres brown; 4 th flagellomere 3.5 times as long as wide, neck portion about 1 / 13 of its whole length (Fig. 10 A View Figure 10 ), hairs yellowish brown and slightly shorter than width of flagellomere. Palpus brown, 3 - segmented with length ratio 1.5: 1.0: 2.3, 1 st segment with 7 setae and with indistinct sensory area bearing minute sensilla, 2 nd segment with 9 setae, 3 rd segment slender with 8 setae (Fig. 10 B View Figure 10 ). Thorax: Color predominantly dark brown; setae on mesonotum and scutellum consist of longer and shorter ones, scutellum with 5 long setae; posterior pronotum with setae. Legs predominantly brown; tibiae and basitarsi with differentiated spine-like short setae in ground setosity; fore tibial spur about 1.3 times as long as width of tibial apex. Wing with brownish anterior veins and light brownish posterior veins; wing membrane without macrotrichia but a macrotrichium is seen between M 1 and M 2 of left wing; R 5 and M 1 with both dorsal and ventral macrotrichia, bM with 3 dorsal macrotrichia, r-m with 7 dorsal macrotrichia, M 2, CuA 1, and CuA 2 with dorsal macrotrichia, stem of M with 14‒15 dorsal macrotrichia; length of R 1 = 1.2 R, c = 0.7w, r-m = 1.0 bM, stem of CuA very short, almost absent; R 1 ending slightly beyond level of branching point of M 1 and M 2; wing length 4.0 mm. Halter brown, knob and distal 1 / 3 of stalk with setae. Abdomen: Tergites and sternites dark brown with dense dark brownish setae. Gonocoxite wider than long with U-shaped cleft in base (Fig. 10 C View Figure 10 ); gonostylus pyriform, left gonostylus with 6 spines and right gonostylus with 7 spines inside, 2 spines directed downward compared to the other ones (Fig. 10 D View Figure 10 ); tegmen nearly triangular but with arcuate base, and with rounded membranous appendage on upper portion (Fig. 10 C View Figure 10 ); aedeagus located beneath tegmen (Fig. 10 C View Figure 10 ). Body size: 3.9 mm.

Female. Unknown.

Remarks.

This new species resembles Palaearctic T. edwardsi and Nearctic T. cylindrica , but is distinguished from them by the shorter and more closely arranged spines of the gonostylus (Fig. 10 D View Figure 10 ). The clearly bordered U-shaped cleft of the base of the gonocoxite is also characteristic for this species (Fig. 10 C View Figure 10 ). Only one male of this species was collected at a high altitude locality (1350 m). The name of this new species is derived from the montane habitat where it was collected and its clear (bare) wing membrane contrasting with the dark brownish body.