Dilar cornutus, 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 : 486-487

Dilar cornutus sp. nov.

( Figs. 17 , 94–97 )

Diagnosis. This species is characterized by the forewings with many brown spots irregularly patterned, the proximally spoon-shaped male ninth gonocoxite, and the male ectoproct posterodorsally with a pair of cornute projections.

Description. Male. Body length 5.4 mm; forewing length 9.8 mm, hindwing length 7.8 mm.

Head pale yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 23 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 3.0 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 dark brown on anterior and lateral margins, scutellum with posterior half brown; metanotum pale yellow, slight darker on lateral margins. Legs pale yellow, femora blackish brown at tip. Wings transparent, slightly yellow, with numerous small brown spots. Forewing ~2.3 times as long as wide, densely spotted, proximal spots slightly darker, irregularly arranged, an immaculate area present distal to median nygma; two nygmata present on proximal and median portion of forewing, a large brownish marking present around median nygma. Hindwing ~2.1 times as long as wide, much paler than forewing; one nygma present at middle. Veins pale yellow. Forewing with trichosors present along wing margin between R and CuA; 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 five main branches.

Abdomen pale yellow, pregenital segments dorsally pale brown. Ninth tergite in dorsal view with an arcuate anterior incision and a deeply V-shaped posterior incision, leaving a pair of subtriangular hemitergites, which are obtuse distally and densely haired ( Fig. 94 ); in lateral view broad ( Fig. 96 ), with arcuate posterior margin. Ninth sternite considerably shorter than ninth tergite, truncately posteriad. Ectoproct in dorsal view posterodorsally with a pair of cornute projections, medially with a subrectangular projection, posteroventrally with a pair of oblong and flattened projections and a pair of bifid unguiform projections. Ninth gonocoxite ( Fig. 94 ) slenderly elongate and slightly sinuate, with base spoon-shaped and with unguiform tip; tenth gonocoxite slenderly elongate, incurved at base, with truncate tip; gonarcus slendely beam-shaped, laterally connecting to bases of ninth gonocoxites. Hypandrium internum nearly trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, CHINA: Yunnan Province, Longling, Mt. Xiaoheishan [24°33′N, 98°49′E], 1800 m, 16.V.2006, Xingyue Liu ( CAU).

Distribution. China (Yunnan).

Etymology. The specific epithet “ cornutus ” refers to the male ectoproct posterodorsally with a pair of hornlike projections in the new species.

Remarks. This species can be distinguished from the other Dilar species from Yunnan Province by the bright wings with numerous small spots irregularly patterned and by the male gonocoxite complexes 9, 10 and 11 with both ninth and tenth gonocoxites slenderly elongate and almost being equal in length. Furthermore, this new species has a remarkable male ectoproct posterodorsally with a pair of horn-like projections.

Figures

FIGURES 16 – 18. Adults of Dilar spp. 16. D. montanus Yang, male; 17. D. cornutus sp. nov., male holotype; 18. D. lii sp. nov., male holotype. Scale bars: 1.0 mm.

FIGURES 94 – 97. Dilar cornutus sp. nov. 94. Male genitalia, dorsal view; 95. Male genitalia, ventral view; 96. Male genitalia, lateral view; 97. Male ectoproct, caudal view. Scale bars: 0.5 mm.