Dilar puerensis, Li & Liu, 2025

Dilar puerensis sp. nov.

Fig. 5 Common name. 普洱栉角蛉 View Figure 5

Diagnosis.

The new species is characterised by the forewing with many brown stripes (Fig. 5 A View Figure 5 ) and by the bifurcated male gonocoxite 10, with a spinous mesal lobe directed medially and a falcate lateral lobe directed laterally (Fig. 5 C, G View Figure 5 ).

Description.

Male. Body length 5.6 mm; forewing length 8.2 mm, hindwing length 7.0 mm.

Head generally brown, with pale brown setose tubercles; vertex brown. Compound eyes blackish-brown. Antenna generally brown, but scapus and pedicellus dark brown; flagellum pectinate, medial branches longer than those branches at base, longest branch nearly 3.5 times as long as corresponding flagellomere, distal seven flagellomeres simple.

Thorax brown; pronotum with a pair of yellow ovoid tubercles at middle; mesonotum dark brown at middle, as well as along anterior, posterior and lateral margins; metanotum much paler than mesonotum. Legs pale brown, tibiae and each tarsomere dark brown at tip. Wings hyaline, slightly pale brown (Fig. 5 A View Figure 5 ). Forewing 2.3 times as long as wide, with many transversely arcuate stripes, a small immaculate area present distad median nygma, markings darker on base; two nygmata present at base and middle, nygmata respectively surrounded by 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, with each pregenital segment dark brown dorsally. Tergum 9 in dorsal view with an arcuate incision, a nearly V-shaped posterior incision, leaving a pair of triangular hemitergites, which are obtuse distally and densely setose. Sternum 9 almost half as long as tergum 9, convex posteriad (Fig. 5 G, H View Figure 5 ). Ectoproct in dorsal view nearly rectangular, with a deeply anterior incision; posterodorsally arcuately concaved medially, laterally with a short digitiform and a unguiform projections (Fig. 5 B, F View Figure 5 ); posteroventrally with a bifid digitiform projection and a pair of bifid unguiform projections (Fig. 5 E, I View Figure 5 ). Gonocoxite 9 slender elongated, proximal 1 / 3 inflated, nearly rectangular, distal 2 / 3 slender elongated, blade-like, with laterally directed tip (Fig. 5 B, F View Figure 5 ). Gonocoxite 10 almost as long as gonocoxite 9, submedially with a sclerite connecting to gonocoxite 9, medially bifurcate, with a spinous mesal lobe directed medially and a falcate lateral lobe directed laterally (Fig. 5 C, G View Figure 5 ). Fused gonocoxites 11 nearly beam-shaped, laterally connecting to bases of gonocoxites 9 (Fig. 5 B, F View Figure 5 ). Hypandrium internum nearly trapezoidal, with lateral margins slightly arcuate (Fig. 5 B, F View Figure 5 ).

Materials examined.

Holotype ♂, China • Yunnan Province, Puer, Dachunhe [普洱大椿河], 1400 m alt., 22. V. 2021, Yuchen Zheng ( CAU) . Paratypes • 16 ♂, same data as holotype ( CAU) .

Etymology.

The specific epithet “ puerensis ” refers to the type locality of the new species, i. e. Puer City, Yunnan Province, China.

Distribution.

China ( Yunnan).

Remarks.

The new species should be a member of the D. lijiangensis species-group, based on the slender elongate male gonocoxite 9, which is inflated at base and the male gonocoxite 10 submedially bifurcated. Amongst the species of the D. lijiangensis species-group, the new species appears to be closely related to D. nobilis from Yunan, China, in having similar characters, for example, the forewing with many dark spots connected with each other, the male ectoproct posterodorsally with two pairs of lateral projections, the slender elongate male gonocoxite 9 inflated at base and the slender elongate male gonocoxite 10 bifurcated at the middle. However, the new species can be clearly distinguished from the latter species by the male gonocoxite 9 not strongly incurved in dorsal view (Fig. 5 B, F View Figure 5 ), the bifid male gonocoxite 10 with slightly longer, straight inner lobe and relatively shorter, falcate outer lobe (Fig. 5 C, G View Figure 5 ). In D. nobilis , the male gonocoxite 9 is strongly incurved in dorsal view and the bifid male gonocoxite 10 has a shorter, laterally curved inner lobe and relatively longer, digitiform outer lobe ( Zhang et al. 2015: fig. 83).