Dilar lineatus Zhang, Liu & Winterton

Zhang, Wei, Liu, Xingyue, Winterton, Shaun L., Aspöck, Horst & Aspöck, Ulrike, 2016, A review of the pleasing lacewing genus Dilar Rambur (Neuroptera, Dilaridae) from Southeast Asia, Zootaxa 4105 (2), pp. 124-144 : 131

publication ID	https://doi.org/ 10.11646/zootaxa.4105.2.2
publication LSID	lsid:zoobank.org:pub:D9C808C8-3A4E-4710-9960-30BAF20FEBAD
DOI	https://doi.org/10.5281/zenodo.6091560
persistent identifier	https://treatment.plazi.org/id/CB4A87BE-FFF4-8574-A0EC-EBDBFE89FE8D
treatment provided by	Plazi
scientific name	Dilar lineatus Zhang, Liu & Winterton
status	sp. nov.

Treatment

Dilar lineatus Zhang, Liu & Winterton View in CoL , sp. nov.

( Figs. 3 View FIGURES 1 – 5 , 22–25 View FIGURES 22 – 25 )

Diagnosis. This species is characterized by the forewings with many regularly arranged dark stripes, and by the male gonocoxite 10, which is slightly longer than gonocoxite 9, anteriorly strongly incurved, and acutely pointed at tip.

Description. Male. Body length 5.1 mm; forewing length 10.8 mm, hindwing length 9.0 mm.

Head pale yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna pale yellowish brown, pedicel with brown annular stripes, flagellum unipectinate on most flagellomeres, longest branch nearly 8.0 times as long as relevant flagellomere.

Prothorax pale yellow, pronotum pale brown, with anterior margin and posterolateral corners yellow, medially with a pair of ovoid markings; mesothorax yellowish brown, mesonotum dark brown on anterior and lateral margins, scutellum with posterior half dark brown; metanotum pale yellowish brown, slightly darker on lateral margins. Legs pale yellow, femora blackish brown at tip. Wings hyaline, slightly smoky brown, with numerous dark stripes. Forewing ~2.0 times as long as wide, densely striped, proximal stripes slightly darker, arranging as transversely arcuate pattern. Hindwing ~2.0 times as long as wide, almost immaculate. Veins pale yellow, crossveins much darker than longitudinal veins.

Abdomen yellowish brown, pregenital segments dorsally dark brown. Tergum 9 in dorsal view with a shallowly arcuate anterior incision, a deeply U-shaped posterior incision and a short dorsoprocessus, leaving a wide median portion and a pair of sub trapezoidal hemitergites, which are obtuse distally and densely haired. Sternum 9 obviously shorter than tergum 9, slightly concave posteriad. Ectoproct in dorsal view nearly trapezoidal, posteroventrally with a pair of semicircular and flattened projections, posterodorsally with a pair of bifid unguiform projections, a pair of short, feebly sclerotized, digitiform projections and a pair of strongly sclerotized, pointed projections. Gonocoxite 9 in dorsal view broad on proximal half, with incurved, unguiform tip; gonocoxite 10 slightly longer than gonocoxite 9, strongly incurved anteriorly, with pointed tip; gonarcus slendely beamshaped, laterally connecting to bases of gonocoxites 9. Hypandrium internum narrowly trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, VIETNAM: Thua Thien Hue, Bach Ma National Park [16°11′36.2′′N, 107°51′15.4′′E], 1206 m, 2–17.VI.2000, B. Hubley ( CAU). Paratypes 1♂, VIETNAM: Thua Thien Hue, Bach Ma National Park [16°11′58.7′′N, 107°51′26.8′′E], 1450 m, 2–16.VI.2000, B. Hubley ( CAU).

Distribution. Vietnam (Thua Thien Hue).

Etymology. The specific epithet “ lineatus ” refers to the forewings with many regularly arranged dark stripes in the new species.

Remarks. The new species resembles D. abnormis Zhang, Liu & Winterton , sp. nov. and D. loeinensis Zhang, Liu & Winterton , sp. nov. from northern Thailand, but it can be distinguished from the other Vietnamese species, i.e. D. ohli and D. vietnamensis based on the wing marking patterns. In the latter two species the forewing brown markings are much darker and more regularly arranged as transverse stripes, while in the former three species the forewing brownish markings are more discrete. Based on the genitalia, the new species seems to be closely related to Dilar insularis Zhang, Liu & Aspöck, 2014 from Hainan and Taiwan in having similar male gonocoxites 9 and 10, but it can be distinguished from the latter species by the absence of the submedial projection of the male gonocoxite 10.