Dilar yunnanus Yan

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 : 479-480

Dilar yunnanus Yan g

( Figs. 13 , 72–75 )

Dilar yunnanus Yang, 1986: 154 . Type locality: China (Yunnan: Ruili).

Diagnosis. This species is characterized by the forewings with many narrow, pale yellowish brown stripes, the strongly inflated male ninth gonocoxite with unguiform tip, and the slenderly elongate, strongly incurved male tenth gonocoxite.

Description. Male. Body length 3.5–4.0 mm; forewing length 7.0– 7.4 mm, hindwing length 5.8–6.3 mm.

Head pale yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 22 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 4.0 times as long as relevant flagellomere, but branch of 1st flagellomere short and dentate, distal seven flagellomeres simple.

Prothorax pale yellow, pronotum pale yellowish brown, with anterior margin and posterolateral corners yellow, medially with a pair of ovoid markings; mesothorax pale yellowish brown, mesonotum brown on anterior and lateral margins, scutellum brown; metanotum pale yellowish brown, slight darker on lateral margins. Legs pale yellow, but femora blackish brown at tip. Wings transparent, slightly yellowish brown. Forewing ~2.2 times as long as wide, with many pale yellowish brown and narrow stripes, proximal stripes slightly darker, arranging as transversely arcuate pattern; two nygmata present on proximal and median portions of forewing. Hindwing ~2.3 times as long as wide, much paler than forewing; one nygma present at middle. Veins pale brown, crossveins slightly darker than longitudinal veins. Forewing with trichosors present along wing margin between R and CuP; costal crossveins simple, but occasionally forked; Sc just touching R in pterostigmatic region, terminally leaving several weak veinlets; Rs with four main branches. Hindwing with trichosors present along wing margin between R and CuA; Rs with four main branches.

Abdomen yellow, pregenital segments dorsally pale brown. Ninth tergite in dorsal view with a nearly truncate or arcuate anterior incision and a nearly U-shaped posterior incision, leaving wide median portion and a pair of subtrapezoidal hemitergites, which are obtuse distally and densely haired ( Fig. 72 ); in lateral view broad ( Fig. 74 ), with straight ventral margin and arcuate posterior margin. Ninth sternite considerably shorter than ninth tergite, arcuately convex posteriad. Ectoproct in dorsal view truncate at tip, with medial portion serrate, posteroventrally with a pair of nearly semicircular and flattened projections, posterodorsally with a pair of bifid unguiform projections and a feebly sclerotized, digitiform projection. Ninth gonocoxite ( Fig. 72 ) strongly inflated, with unguiform tip; tenth gonocoxite slenderly elongate, incurved, which is connecting to ninth gonocoxite near base; gonarcus slendely beam-shaped, with media portion extrude posteriad, laterally connecting to bases of ninth gonocoxites. Hypandrium internum narrowly trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, CHINA: Yunnan Province, Ruili [24°04′N, 97°47′E], 1500 m, 4.V.1981, Chikun Yang ( CAU). Paratype 2♂, same data as holotype ( CAU); 1♂, CHINA: Yunnan Province, Ruili [24°04′N, 97°47′E], 1500 m, 4.V.1981, Fasheng Li ( CAU); 1♂, CHINA: Yunnan Province, Lincang, Gengma [23°32′N, 99°24′E], 1200 m, 5.V.1955, Tianrong Huang ( IZCAS).

Distribution. China (Yunnan).

Figures

FIGURES 13 – 15. Adults of Dilar spp. 13. D. yunnanus Yang, male holotype; 14. D. lijiangensis sp. nov., male holotype; 15. D. nobilis sp. nov., male holotype. Scale bars: 1.0 mm.

FIGURES 72 – 75. Dilar yunnanus Yang. 72. Male genitalia, dorsal view; 73. Male genitalia, ventral view; 74. Male genitalia, lateral view; 75. Male ectoproct, caudal view. Scale bars: 0.5 mm.