Dilar lijiangensis, 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 : 480-482

Dilar lijiangensis sp. nov.

( Figs. 14 , 76–81 )

Diagnosis. This species is characterized by the sparsely spotted pale yellowish brown forewings, the ninth gonocoxite inflated on proximal half with incurved, unguiform tip, and the slenderly elongate tenth gonocoxite, which subbasally extends into an inflated and elongate lobe connecting to ninth gonocoxite.

Description. Male. Body length 5.8 mm; forewing length 11.2 mm, hindwing length 10.1 mm.

Head yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 28 segments, dark brown, pedicel with brown annular stripes, flagellum unipectinate on most flagellomeres, medial branches much longer than those on both ends, longest branch nearly 3.0 times as long as relevant flagellomere, but branch of 1st flagellomere short and dentate, distal six flagellomeres simple.

Prothorax pale yellow, pronotum yellowish brown, with anterior margin and posterolateral corners yellow, medially with a pair of ovoid markings; mesothorax yellowish brown, mesonotum dark brown on anterior and lateral margins; metanotum yellowish brown, slight darker on lateral margins. Legs brown, femora blackish brown at tip. Wings pale yellowish brown. Forewing ~2.1 times as long as wide, with no obviously markings; two nygmata present on proximal and median portion of forewing. Hindwing ~2.0 times as long as wide, pale yellow; one nygma present at middle. Veins pale brown. 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 yellowish brown, pregenital segments dorsally dark brown. Ninth tergite in dorsal view with an arcuate anterior incision, a nearly V-shaped posterior incision, leaving a pair of broad hemitergites, which are obtuse distally and densely haired ( Fig. 76 ); in lateral view broad ( Fig. 78 ), with straight ventral margin and arcuate posterior margin. Ninth sternite much shorter than ninth tergite, arcuately convex posteriad. Ectoproct posterolaterally with a pair of unguiform projections in dorsal view, posteroventrally with a pair of bifid unguiform projections, a pair of feebly sclerotized, digitiform projections, and a pair of nearly semicircular flattened projections. Ninth gonocoxite ( Fig. 76 ) inflated on proximal half, slenderly elongate, with tip incurved and unguiform; tenth gonocoxite slenderly elongate, incurved anteriorly, with spinous tip, subbasally extending into an inflated and elongate lobe connecting to ninth gonocoxite; gonarcus slender, W-shaped, laterally connecting to bases of ninth gonocoxites. Hypandrium internum nearly trapezoidal, with lateral margins slightly arcuate.

Female. Body length 8.0 mm; forewing length 14.8 mm, hindwing length 12.8 mm.

Seventh sternite in lateral view subtrapezoidal, in ventral view subtrapezoidal, with nearly truncate posterior margin. Eighth abdominal segment ventrally without subgenitale. Ninth tergite in lateral view much narrower than eighth tergum, directed posteroventrad. Bursa copulatrix with colleterial gland tubular and elongate, slightly sinuate; basal part of bursa copulatrix sac-like in lateral view, with an arcuate anterior incision in ventral view, laterally with a pair of sclerotized strips; bursal accessory gland not observed. Ectoproct small, ovoid.

Materials examined. Holotype ♂, CHINA: Yunnan Province, Lijiang [26°52′N, 100°13′E], 1935, H. Hǒne (MFN). Paratypes 2♂, CHINA: Yunnan Province, Lijiang, Gaoshan Botanical Garden [27°00′N, 100°11′E], 3260m, 2009. VI.18, Hongxiang Han, Chao Yang & Feng Qi ( IZCAS); 1♀, CHINA: Yunnan Province, Lijiang [26°52′N, 100°13′E], 1934, H. Hǒne (MFN).

Distribution. China (Yunnan).

Etymology. The specific epithet “ lijiangensis ” refers to the type locality Lijiang, Yunnan Province, China.

Remarks. Differentiation to the related species D. nobilis sp.nov. see under remarks there.

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 76 – 81. Dilar lijiangensis sp. nov. 76. Male genitalia, dorsal view; 77. Male genitalia, ventral view; 78. Male genitalia, lateral view; 79. Male ectoproct, caudal view. 80. Female genitalia, lateral view; 81. Female genitalia, ventral view. Scale bars: 0.5 mm.