Dilar jiquanyui, Li & Liu, 2025

Dilar jiquanyui sp. nov.

Fig. 2 Common name. 季权宇栉角蛉 View Figure 2

Diagnosis.

The new species is characterised by the forewing with many short, arcuate stripes throughout which is darker on the proximal 1 / 4 (Fig. 2 A View Figure 2 ) and by the largely triangular male gonocoxite 9 (Fig. 2 B, F View Figure 2 ) and male gonocoxite 10 with an additional slender elongated, spinous lateral projection at middle (Fig. 2 C, G View Figure 2 ).

Description.

Male. Body length 6.0 mm; forewing length 8.5 mm, hindwing length 7.2 mm.

Head generally brown, with yellow setose tubercles, tubercles surrounded by dark brown markings; vertex brown. Compound eyes blackish-brown. Antenna brown; flagellum pectinate, medial branches longer than those branches at base, longest branch nearly 4.0 times as long as corresponding flagellomere, distal seven flagellomeres simple.

Thorax brown; pronotum with a pair of pale brown ovoid tubercles at middle, tubercles surrounded by dark brown markings; mesonotum darker at middle, as well as along anterior, posterior and lateral margins; metanotum much paler than mesonotum. Legs generally pale brown, but protibiae entirely brown, femora, tibiae and each tarsomere dark brown at tip. Wings pale brown (Fig. 2 A View Figure 2 ). Forewing 2.3 times as long as wide, with many short, arcuate stripes throughout, which is darker on the proximal 1 / 4; two nygmata present at base and middle, median nygma surrounded by a brown spot; longitudinal veins pale yellow, interrupted by many brown spots; crossveins pale brown. Hindwing 2.1 times as long as wide, almost entirely pale brown, with less markings than forewing.

Abdomen brown. Tergum 9 in dorsal view with an arcuate incision, a nearly V-shaped posterior incision, leaving a pair of subtriangular hemitergites, which are obtuse distally and densely setose. Sternum 9 approximately half as long as tergum 9, convex posteriad (Fig. 2 G View Figure 2 ). Ectoproct in dorsal view nearly trapezoidal, with a slightly arcuate anterior incision; posterodorsally with a pair of unguiform projections laterally (Fig. 2 F View Figure 2 ), posteroventrally with a pair of digitiform projections and two pairs of tiny, unguiform projections (not clearly visible in ventral view, but distinct in caudal view) (Fig. 2 E, I View Figure 2 ). Gonocoxite 9 slender elongate, nearly triangular in dorsal view, proximal half with a longitudinal sclerite at middle connecting to gonocoxite 10, the proximal 1 / 3 with a spinous projection on lateral margin, distally strongly sclerotised and spinous (Fig. 2 B, F View Figure 2 ). Gonocoxite 10 slightly shorter than gonocoxite 9, with thin, strongly incurved base and lamellar tip, and the proximal 1 / 3 producing a strongly sclerotised, spinous lateral projection, which curving medially (Fig. 2 C, G View Figure 2 ). Fused gonocoxites 11 nearly beam-shaped, laterally slightly curved anteriorly, connecting to bases of gonocoxite 9 (Fig. 2 B, F View Figure 2 ). Hypandrium internum large, nearly trapezoidal, with lateral margins slightly arcuate (Fig. 2 C, G View Figure 2 ).

Material examined.

Holotype ♂, China • Yunnan Province, Dali, Baizu State , Heqing County [白族自治州鹤庆县], 26.236614°N, 100.170742°E, 2401 m alt., 26. V. 2023, Quanyu Ji ( CAU) GoogleMaps .

Etymology.

The new species is dedicated to Mr. Quanyu Ji, who collected the type specimen.

Distribution.

China ( Yunnan).

Remarks.

The new species resembles D. cangyuanensis in having similar male genital characters, for example, the trapezoidal ectoproct, the large subtriangular gonocoxite 9 with inflated base and spinous tip, the gonocoxite 10 with slender, strongly incurved base, the fused gonocoxites 11 with lateral ends angulately curved towards anteriad. However, the new species can be distinguished from the latter by the inconspicuous immaculate area distad to the median nygma (Fig. 2 A View Figure 2 ) and the gonocoxite 9 and 10, respectively producing a spinous projection on lateral margin at the proximal 1 / 3 (Fig. 2 B, C, F, G View Figure 2 ). However, in D. cangyuanensis , the forewing has a broad immaculate area present distad from the median nygma ( Li et al. 2021: fig. 1 A) and there are no additional lateral projections of male gonocoxites 9 and 10 ( Li et al. 2021: fig. 4).