Dilar loeinensis 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 : 132-134

Dilar loeinensis Zhang, Liu & Winterton , sp. nov.

( Figs. 4 , 26–29 )

Diagnosis. This species is characterized by the forewings with numerous pale brown markings, and the male complexes of gonocoxites 9, 10, and 11 with strongly incurved gonocoxite 10, which submedially extended a pointy projection connecting to gonocoxite 9.

Description. Male. Body length 5.5 mm; forewing length 8.0 mm, hindwing length 6.5 mm.

Head yellowish brown, with pale yellowish brown setose tubercles. Compound eyes blackish brown. Antenna pale yellowish brown, pedicel with brown annular stripes, flagellum unipectinate on most flagellomeres, longest branch nearly 7.0 times as long as relevant flagellomere.

Prothorax brown, pronotum dark brown, 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, slight darker on lateral margins. Legs pale yellowish brown, femora blackish brown at tip. Wings hyaline, slightly smoky brown, with numerous pale brown spots. Forewing ~2.0 times as long as wide, densely spotted, proximal spots slightly darker, arranging as transversely arcuate pattern, an immaculate area present distal to median nygma. Hindwing ~2.2 times as long as wide, much paler than forewing, immaculate. Veins pale yellow, crossveins much darker than longitudinal veins.

Abdomen yellow, pregenital segments dorsally yellowish brown. Tergum 9 in dorsal view with a deeply arcuate anterior incision and a nearly V-shaped posterior incision, leaving a narrow median portion and a pair of subtrapezoidal hemitergites, which are obtuse distally and densely haired. Sternum 9 obviously shorter than tergum 9. Ectoproct in dorsal view with a deeply arcuate anterior incision, posteroventrally with a pair of short and flattened projections, a pair of bifid unguiform projections and a pair of short, feebly sclerotized, digitiform projections. Gonocoxite 9 slightly inflated proximally, with unguiform tip; gonocoxite 10 slenderly elongate, strongly curved, and submedially extended a pointy projection connecting to gonocoxite 9; gonarcus slenderly beam-shaped, slightly inflated on both ends, laterally connecting to bases of gonocoxites 9. Hypandrium internum trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, THAILAND, Loei, Phu Kradueng NP, Forest protection unit Loei. 5 (Phakbung) [16°50.493′N, 101°41.726′E], 25.II–1.III.2007, Malaise trap, Sonkgran Kamtue, T1506 ( CSCA). Distribution. Thailand (Loei).

Etymology. The specific epithet “ loeinensis ” refers to the type locality, i.e. Loei, in northern Thailand. Remarks. The new species seems to be somewhat related to the species of the D. guangxiensis group by the male gonocoxite 10 with submedial projection connecting to gonocoxite 9. However, the dorsoprocessus of the male tergum 9 that is present in all species of the D. guangxiensis group is absent in D. loeinensis Zhang, Liu & Winterton , sp. nov.

Figures

FIGURES 1 – 5. Adults of Dilar spp. 1. D. abnormis Zhang, Liu & Winterton, sp. nov., male holotype; 2. D. grandis (Banks), male holotype; 3. D. lineatus Zhang, Liu & Winterton, sp. nov., male holotype; 4. D. loeinensis Zhang, Liu & Winterton, sp. nov., male holotype; 5. D. macleodi Oswald & Schiff, male paratype.

FIGURES 26 – 29. Dilar loeinensis Zhang, Liu & Winterton, sp. nov. 26. Male genitalia, dorsal view; 27. Male genitalia, ventral view; 28. Male genitalia, lateral view; 29. Male ectoproct, caudal view. Scale bars: 0.5 mm.