Dilar miralobatus, Li & Aspöck & Aspöck & Liu, 2020

Li, Di, Aspöck, Horst, Aspöck, Ulrike & Liu, Xingyue, 2020, A review of the pleasing lacewing genus Dilar Rambur (Neuroptera, Dilaridae) from South Asia, Zootaxa 4743 (2), pp. 200-216 : 206-207

Dilar miralobatus sp. nov.

( Figs 4 , 20–23 )

Diagnosis. The new species is characterized by the forewing with numerous pale brown markings, arranged as inconspicuous transverse stripes, the male genital sclerites with gonocoxite 9 bifurcated, subdistally with an additional swollen lobe and distally with elongate spinous apex, the gonocoxite 10 slenderly elongate and incurved at a right angle on distal half, and the fused gonocoxites 11 nearly U-shaped.

Description. Male. Body length 2.9–3.2 mm; forewing length 5.4–5.7 mm, hindwing length 4.6–4.9 mm.

Head brown, with pale brown setose tubercles. Vertex dark brown. Frons pale brown. Compound eyes blackish brown. Antenna brown, flagellum pectinate on most flagellomeres, medial branches much longer than those on both ends, longest branch nearly 3.0 times as long as corresponding flagellomere, distal seven flagellomeres simple.

Pro-, meso- and metathorax brown, pro- and metanotum yellowish brown, mesonotum brown, darker on posterior. Legs pale brown, femora and tibiae dark brown at their tips. Wings hyaline, slightly pale yellow. Forewing 2.1 times as long as wide, with dense pale brown spots, arranged as transverse stripes; longitudinal veins pale yellow, interrupted by numerous brown spots; crossveins pale brown. Hindwing 2.0 times as long as wide, almost immaculate.

Abdomen pale brown. Tergum 9 in dorsal view with an arcuate anterior incision, a nearly U-shaped posterior incision, leaving a pair of broad hemitergites, which are obtuse distally and densely haired. Sternum 9 ( Fig. 21 ) subtrapezoidal, membranous, only half of the length of tergum 9. Ectoproct subtriangular ( Figs. 20–21, 23 ), in dorsal view with an arcuate anterior incision, posteroventrally with a pair of nearly semicircular and flattened projections ( Fig. 21 ); posterodorsally with a pair of subtriangular projections ( Fig. 20 ). Gonocoxite 9 ( Fig. 20 ) inflated on proximal half, bifurcated, narrowed and slenderly elongated on distal half, subdistally with an additional swollen lobe directed medially, distally with spinous tip directed posteriad. Gonocoxite 10 ( Fig. 21 ) almost as long as gonocoxite 9, inflated on proximal half, slenderly elongate and incurved at a right angle on distal half. Fused gonocoxites 11 ( Fig. 20 ) nearly U-shaped, laterally connecting to proximal half of gonocoxites 9 and 10. Hypandrium internum absent.

Female. Unknown.

Materials examined. Holotype ♂, Ceylon, Anu [radhapura] Dist [rict]. Irrigation Bungalow Padaviya, 180 ft [55 m], 27.II–9.III.1970, Davis & Rowe (PCWH) . Paratype 2♂, Ceylon, Anu [radhapura] Dist [rict]. Wildlife Soc. Bungalow Hunuwilagama, Wilpattu, 200 ft [61 m], 10–19.III.1970, Davis & Rowe (PCWH) .

Distribution. Sri Lanka (North Central).

Etymology. The specific epithet “ miralobatus ” refers to the male gonocoxite 9 subdistally with an additional swollen lobe directed medially.

Remarks. Dilar miralobatus sp. nov. can be distinguished from the other Dilar species by the male with the bifurcated gonocoxite 9, distally with spinous apex and subdistally with an additional medially directed swollen lobe ( Fig. 19 ); the gonocoxite 10 incurved at a right angle on distal half ( Fig. 20 ), and the fused gonocoxites 11 nearly U-shaped ( Fig. 19 ). In the other seven Dilar species from south Asia, the gonocoxite 9 has no additional lobes.

Figures

FIGURE 4. Dilar miralobatus sp. nov., male holotype, habitus. Scale bar: 2.0 mm.

FIGURES 20–23. Dilar miralobatus sp. nov., male holotype. 20. genitalia, dorsal view; 21. genitalia, ventral view; 22. genitalia, lateral view; 23. ectoproct, caudal view. e: ectoproct; gx9: gonocoxite 9; gx10: gonocoxite 10; gx11: fused gonocoxites 11; S9: sternum 9; T9: tergum 9. Scale bar: 0.2 mm.

FIGURES 16–19. Dilar clavatus sp. nov., male holotype. 16. genitalia, dorsal view; 17. genitalia, ventral view; 18. genitalia, lateral view; 19. ectoproct, caudal view. e: ectoproct; gx9: gonocoxite 9; gx10: gonocoxite 10; gx11: fused gonocoxites 11; S9: sternum 9; T9: tergum 9. Scale bar: 0.2 mm.