Dilar maoershanensis, Zhang, Wei, Liu, Xingyue, Aspöck, Horst & Aspöck, Ulrike, 2015

Zhang, Wei, Liu, Xingyue, Aspöck, Horst & Aspöck, Ulrike, 2015, Revision of Chinese Dilaridae (Insecta: Neuroptera) (Part III): Species of the genus Dilar Rambur from the southern part of mainland China, Zootaxa 3974 (4), pp. 451-494 : 466-467

Dilar maoershanensis sp. nov.

( Figs. 4 , 32–35 )

Diagnosis. This species is characterized by the forewings with many dark spots mostly fused with each other, the strongly inflated ninth gonocoxite with forked tip, and the slenderly elongate male tenth gonocoxite which is much longer than the ninth gonocoxites.

Description. Male. Body length 6.8 mm; forewing length 10.7 mm, hindwing length 8.9 mm.

Head pale yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 28 segments, pale yellowish brown, pedicel with brown annular stripes, flagellum unipectinate on most flagellomeres, medial branches much longer than those on both ends, longest branch nearly 5.0 times as long as relevant flagellomere, but branch of 1st flagellomere short and dentate, distal seven flagellomeres simple.

Prothorax pale yellowish brown, pronotum nearly hexagonal, medially with a pair of ovoid markings; mesothorax pale 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 yellowish brown, femora blackish brown at tip. Wings transparent, slightly smoky brown, with numerous dark spots. Forewing ~2.3 times as long as wide, densely spotted, proximal spots slightly darker, arranging as transversely arcuate pattern, a big immaculate area present distal to the median nygma; two nygmata present on proximal and median portion of forewing, median one much larger than the other near wing base. Hindwing ~2.1 times as long as wide, slightly paler than forewing; one nygma present at middle. Veins pale yellow, crossveins much paler than longitudinal veins. Forewing with trichosors present along wing margin between R and CuA; costal crossveins simple, but occasionally forked; Sc terminally leaving several weak veinlets; Rs with five main branches. Hindwing with trichosors present along wing margin between R and CuA; Rs with five main branches.

Abdomen pale yellowish brown, pregenital segments dorsally brown. Ninth tergite in dorsal view with a shallowly arched anterior incision and a V-shaped posterior incision, leaving slightly narrow median portion and a pair of subtriangular hemitergites, which are obtuse distally and densely haired ( Fig. 32 ); in lateral view broad ( Fig. 34 ), with truncate ventral margin and arcuately convex posterior margin. Ninth sternite much shorter than ninth tergite, slightly arcuately convex posteriad. Ectoproct in dorsal view nearly trapezoidal, serrate at tip, posteroventrally with a pair of flattened projections, a pair of bifid unguiform projections, and a pair of short, feebly sclerotized, digitiform projections. Ninth gonocoxite ( Fig. 32 ) in dorsal view broad on proximal half, with strongly sclerotized and forked tip; tenth gonocoxite slenderly elongate, nearly 2.0 times as long as ninth gonocoxite, incurved anteriorly, with a projection on proximal end connecting to ninth gonocoxite; gonarcus slendely beam-shaped, which is U-shaped, laterally connecting to base of ninth gonocoxites. Hypandrium internum subtrapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, CHINA: Guangxi Province, Guilin, Mt. Maoershan, Antangping [25°53'N, 110°29'E], 18.VIII.1992, 1500 m, Yonglin Sun & Zhongwu Yang ( CAU).

Distribution. China (Guangxi).

Etymology. The specific epithet “ maoershanensis ” refers to the type locality, i.e. Mt. Maoershan, Guangxi Province, China.

Remarks. See remarks under D. longidens sp. nov.

Figures

FIGURES 4 – 6. Adults of Dilar spp. 4. D. maoershanensis sp. nov., male holotype; 5. D. stenopterus Yang, male holotype; 6. D. tianmuanus Yang, male holotype. Scale bars: 1.0 mm.

FIGURES 32 – 35. Dilar maoershanensis sp. nov. 32. Male genitalia, dorsal view; 33. Male genitalia, ventral view; 34. Male genitalia, lateral view; 35. Male ectoproct, caudal view. Scale bars: 0.5 mm.