Dilar wuyianus 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 : 469-471

Dilar wuyianus Yan g

( Figs. 7 , 44–49 )

Dilar wuyianus Yang, 1999: 95 . Type locality: China (Fujian: Nanping).

Diagnosis. This species is characterized by the forewings with many brown spots arranging as transversely arcuate pattern, the slenderly elongate male ninth gonocoxite proximally broadened and bearing unguiform tip, and the tenth gonocoxite which is slightly longer than ninth gonocoxite and strongly incurved anteroposteriorly.

Description. Male. Body length 5.5 mm; forewing length 9.6 mm, hindwing length 7.9 mm.

Head pale yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 30 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 eight flagellomeres simple.

Prothorax pale yellow, pronotum pale yellow, with lateral margins and posterolateral corners brown, medially with a pair of ovoid markings; mesothorax pale yellow, mesonotum dark brown on anterior and lateral margins, scutellum with posterior half dark brown; metanotum pale yellow, slight darker on lateral margins. Legs pale yellowish brown, but femora blackish brown at tip. Wings transparent, slightly smoky brown, with numerous dark spots. Forewing ~1.9 times as long as wide, densely spotted, proximal spots slightly darker, arranging as transversely arcuate pattern, an immaculate area present distal to median nygma; two nygmata present on proximal and median portion of forewing, median one much larger than the other near wing base. Hindwing ~2.0 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 CuP; costal crossveins simple, but occasionally forked; Sc just touching R in pterostigmatic region, 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 brown, pregenital segments dorsally dark brown. Ninth tergite in dorsal view with a V-shaped anterior incision and a shallowly arched posterior incision, leaving slightly narrow median portion and a pair of subtriangular hemitergites, which are obtuse distally and densely haired ( Fig. 44 ); in lateral view broad ( Fig. 46 ), with truncate ventral margin and arcuately convex posterior margin. Ninth sternite much shorter than ninth tergite, slightly arcuately convex posteriad. Ectoproct in dorsal view subtrapezoidal, with a shallowly arched anterior incision, posteroventrally with a pair of short, flattened and subsemicircular projections, posterodorsally with a pair of subsemicircular projections which are serrate at tip, a pair of bifid unguiform projection and a pair of short, feebly sclerotized, digitiform projections. Ninth gonocoxite ( Fig. 44 ) in dorsal view broad at base, slenderly elongate, with unguiform tip; tenth gonocoxite slenderly elongate, slightly longer than ninth gonocoxite, strongly incurved anteroposteriorly, with a projection on anterior end connecting to ninth gonocoxite; gonarcus slendely beam-shaped, which is nearly U-shaped, laterally connecting to base of ninth gonocoxites. Hypandrium internum subtrapezoidal, with lateral margins slightly arcuate.

Female. Body length 6.5 mm; forewing length 12.1 mm, hindwing length 10.5 mm.

Seventh sternite in lateral view nearly trapezoidal, in ventral view subtrapezoidal, with truncate posterior margin. Eighth abdominal segment with a sclerotized subgenitale, which is slightly angulately prominent in lateral view. Ninth tergite in lateral view very broad ventrally, directed posteroventrad. Bursa copulatrix with colleterial gland tubular and elongate, strongly curved; basal part of bursa copulatrix presents as a ventrally curved sac in lateral view and oval in ventral view; bursal accessory gland not observed. Ectoproct small, ovoid.

Materials examined. Holotype ♂, CHINA: Fujian Province, Nanping, Mt. Wuyishan Dazhulan [27°41'N, 117°38'E], 8.VIII.1946, Xiufu Zhao ( CAU). CHINA: 2♂, Fujian Province, Nanping, Mt. Wuyishan Sangang [27°44'N, 117°37'E], 4.VII.2009, Xiushuai Yang ( CAU); 1♀, Fujian Province, Nanping, Mt. Wuyishan Sangang [27°44'N, 117°37'E], 6.VII. 2009, 940 m, Xiushuai Yang ( CAU).

Distribution. China (Fujian).

Figures

FIGURES 7 – 9. Adults of Dilar spp. 7. D. wuyianus Yang, male holotype; 8. D. dulongjiangensis sp. nov., male holotype; 9. D. guangxiensis sp. nov., male holotype. Scale bars: 1.0 mm.

FIGURES 44 – 49. Dilar wuyianus Yang. 44. Male genitalia, dorsal view; 45. Male genitalia, ventral view; 46. Male genitalia, lateral view; 47. Male ectoproct, caudal view. 48. Female genitalia, lateral view; 49. Female genitalia, ventral view. Scale bars: 0.5 mm.