Dilar ohli Zhang, Liu, Aspöck & Aspöck, 2016

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 : 135-137

Dilar ohli Zhang, Liu, Aspöck & Aspöck , sp. nov.

( Figs. 7 , 34–37 )

Diagnosis. This species is characterized by the forewings with numerous brown stripes, and by the short and broad male gonocoxite 10, submedially with a long, spinous projection.

Description. Male. Body length 4.0 mm; forewing length 9.1 mm, hindwing length 7.5 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 5.0 times as long as relevant flagellomere.

Prothorax pale yellowish brown, pronotum yellowish brown, with anterior margin and posterolateral corners slightly paler, medially with a pair of ovoid markings; mesonotum yellowish brown, slightly darker on anterior and lateral margins; metanotum pale yellowish brown, slightly darker on lateral margins. Legs pale yellowish brown, femora blackish brown at tip. Wings hyaline, slightly smoky brown, with numerous brownish stripes. Forewing ~1.9 times as long as wide, with a number of browanish stripes, which are present as transversely arcuate pattern and slightly darker proximally, an immaculate area present distal to median nygmata. Hindwing ~2.0 times as long as wide, slightly paler than forewing, almost immaculate. Veins pale brown.

Abdomen yellowish brown, pregenital segments dorsally dark brown. Tergum 9 in dorsal view with a deeply arcuate anterior incision and a deeply V-shaped posterior incision, leaving rather narrow median portion and a pair of subtrapezoidal hemitergites, which are obtuse distally and densely haired. Sternum 9 obviously shorter than tergum 9, subtriangular. Ectoproct in dorsal view posteriorly with a pair of decurved unguiform projections and a short, bifurcated median projection, in ventral view medially with a pair of bifid unguiform projections and a pair of short, feebly sclerotized, digitiform projections. Gonocoxite 9 proximally inflated, with a narrowed and ventromedially curved apex; gonocoxite 10 short and broad, submedially with a long, spinous projection, which is laterally curved distad; gonarcus slenderly beam-shaped, laterally connecting to bases of gonocoxites 9. Hypandrium internum nearly trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, “ Tonkin, Montes Mauson [a locality in Lang Son Province, Vietnam, 19°45'N, 107°45'E], 2000–3000’ [609–914 m], April, Mai, H. Fruhstorfer/ Rexavius nietneri ” (MFN). Paratype 1♂, same as holotype (MFN).

Distribution. Vietnam (Lang Son).

Etymology. The new species is dedicated to Dr. Michael Ohl who kindly helped us for the examination of the collection of Dilaridae in MFN.

Remarks. The new species resembles another Vietnamese species, D. vietnamensis , in having similar wing marking patterns. However, the male genitalia between these two species are quite different. In D. ohli Zhang, Liu, Aspöck & Aspöck , sp. nov. the male gonocoxite 9 is posteriorly curved with spinous apex, and the male gonocoxite 10 is short and broad, submedially with a long spinous projection. However, in D. vietnamensis the male gonocoxite 9 is straightly directed with rounded apex, and the male gonocoxite 10 is slenderly elongated, without any additional projection. Actually, we could not find any species closely related to this peculiar new species based on the characteristics of the male genitalia.

Figures

FIGURES 6 – 10. Adults of Dilar spp. 6. D. marmoratus (Banks), male holotype; 7. D. ohli Zhang, Liu, Aspöck & Aspöck, sp. nov., male holotype; 8. D. rotundatus Zhang, Liu & Winterton, sp. nov., male holotype; 9. D. sumatranus Zhang, Liu, Aspöck & Aspöck, sp. nov., male holotype; 10. D. zimmermannae Zhang, Liu, Aspöck & Aspöck, sp. nov., male holotype. Scale bars: 1.0 mm.

FIGURES 34 – 37. Dilar ohli sp. nov. 34. Male genitalia, dorsal view; 35. Male genitalia, ventral view; 36. Male genitalia, lateral view; 37. Male ectoproct, caudal view. Scale bars: 0.5 mm.