Dilar weiningensis, Li & Liu, 2025

Dilar weiningensis sp. nov.

Fig. 8 Common name. 威宁栉角蛉 View Figure 8

Diagnosis.

The new species is characterised by the forewing with many brown spots connected with each other as discontinuous stripes (Fig. 8 A View Figure 8 ) and by the inflated male gonocoxite 10 subdistally forming an additional blade-like lobe (Fig. 8 C, G View Figure 8 ).

Description.

Male. Body length 5.0 mm; forewing length 9.2 mm, hindwing length 7.4 mm.

Head generally brown, with pale brown setose tubercles; vertex brown. Compound eyes blackish-brown. Antenna brown, scapus slightly darker, but pedicellus paler and pedicellus dark brown; flagellum pectinate, medial branches longer than those branches at base, longest branch nearly 5.0 times as long as corresponding flagellomere, distal several flagellomeres damaged.

Thorax brown; pronotum with a pair of yellow ovoid tubercles at middle; mesonotum dark brown on mesoscutellum, as well as along anterior and lateral margins; metanotum paler than mesonotum. Legs pale brown, tibiae and each tarsomere dark brown at tip. Wings slightly pale brown (Fig. 8 A View Figure 8 ). Forewing 2.2 times as long as wide, brown spots, which are mostly connected with each other and arranged as discontinuous stripes; markings darker on base and costal space; two nygmata respectively present at base and middle, median nygma surrounded by a small brownish spot; longitudinal veins pale yellow, interrupted by many brown spots; crossveins pale brown. Hindwing 2.2 times as long as wide, almost immaculate.

Abdomen brown. Tergum 9 in dorsal view with an arcuate incision, a nearly U-shaped posterior incision, leaving a pair of hemitergites, which are obtuse distally and densely setose. Sternum 9 almost half as long as tergum 9, convex posteriad (Fig. 8 C, G View Figure 8 ). Ectoproct in dorsal view nearly trapezoidal, with an arcuately anterior incision; posterodorsally with a pair of unguiform projections (Fig. 8 B, F View Figure 8 ), posteroventrally with a pair of digitiform projections and a pair of unguiform projections (Fig. 8 C, G, I View Figure 8 ). Gonocoxite 9 inflated at middle, with small and obtuse base, distal 1 / 3 bifurcated, with an incurved, unguiform projection and a shorter, pointed projection directed posterolaterally (Fig. 8 B, F View Figure 8 ). Gonocoxite 10 slightly inflated, almost as long as gonocoxite 9, with narrow, incurved base, subdistally forming an additional blade-like lobe (Fig. 8 C, G View Figure 8 ). Fused gonocoxites 11 nearly beam-shaped, strongly anteriorly convex, laterally connecting to bases of gonocoxites 9 (Fig. 8 C, F View Figure 8 ). Hypandrium internum large, nearly trapezoidal, with lateral margins slightly arcuate (Fig. 8 C, G View Figure 8 ).

Materials examined.

Holotype ♂, China • Guizhou Province, Weining County, Zhejue Town, Huangshan Nature Reserve [威宁县哲觉镇黄杉保护区场], 18. VIII. 2020, Tao Li ( CAU) .

Etymology.

The specific epithet “ weiningensis ” refers to the type locality of the new species, i. e. Weining County, Guizhou Province, China.

Distribution.

China ( Guizhou).

Remarks.

The new species cannot be assigned to any of the known species-groups characterised. It is distinctly different from the other species of Dilar , based on the male genital characters, the flattened male gonocoxite 9 distal 1 / 3 bifurcated, with an incurved, unguiform projection and a shorter, pointed projection directed posterolaterally (Fig. 8 F View Figure 8 ) and the male gonocoxite 10 subdistally forming an additional blade-like lobe (Fig. 8 C, G View Figure 8 ).