Trichosia (Trichosia) comprimera, Sutou & Menzel, 2025

Trichosia (Trichosia) comprimera sp. nov.

Fig. 9 A ‒ C View Figure 9

Type material.

Holotype. JAPAN • ♂; Honshu, Kanagawa Pref., Yamakita, Kiridoshi-touge ; 35°25'30"N, 138°55'50"E; alt. 1070 m; 17 May 2008; H. Kawai leg., sweep-net; NSMT. GoogleMaps

Description.

Male. Head: Eye bridge 3‒4 facets wide. Prefrons with setae and clypeus bare. Scape brown with a seta, pedicel brown with about 12 setae; flagellomeres brown; 4 th flagellomere 2.1 times as long as wide, neck portion about 1 / 9 of its whole length (Fig. 9 A View Figure 9 ), hairs yellowish brown and shorter than width of flagellomere. Palpus yellowish brown and 3 - segmented; 1 st segment with 3‒4 setae mainly on its outside and without distinct brownish sensory area, 2 nd segment with about 10 setae, 3 rd segment slender with 10‒12 setae. Length ratio of segments of palpus is unclear because it is preserved obliquely. Thorax: Color predominantly dark brown; setae on mesonotum and scutellum mostly shed off in the holotype; posterior pronotum with setae. Coxae, femora, and tibiae predominantly yellowish brown, tarsi 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; R 5 with both dorsal and ventral macrotrichia, bM bare, r-m with 8 dorsal macrotrichia, M 1, M 2, CuA 1, and CuA 2 with dorsal macrotrichia, stem of M with about 20 dorsal macrotrichia; length of R 1 nearly equal to that of R, c = 0.7w, r-m = 1.5 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 3.1 mm. Halter yellowish brown, knob with setae. Abdomen: Tergites and sternites brown with dark brownish setae, membrane between tergites and sternites yellowish brown. Gonocoxite wider than long (Fig. 9 B View Figure 9 ); gonostylus nearly ovoid in shape with 5 spines and with dense setae above uppermost spine (Fig. 9 C View Figure 9 ), two lowest spines overlap at same level and look like one spine from ventral view; tegmen nearly triangular with minute denticles on lower part (Fig. 9 B View Figure 9 ); aedeagus Y-shaped with dark brownish base (Fig. 9 B View Figure 9 ). Body size: 3.6 mm.

Female. Unknown.

Remarks.

This new species resembles T. lengersdorfi and T. edwardsi , but is distinguished from them by smaller body size, short flagellomeres (Fig. 9 A View Figure 9 ), and dense and long setae on the upper part of the inside of the gonostylus (Fig. 9 C View Figure 9 ). The name comprimera alludes to these dense (compressed) setae.