Dilar maculosus, 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 : 489

Dilar maculosus sp. nov.

( Figs. 19 , 102–107 )

Diagnosis. This species is characterized by the forewings with dark patches and many dark stripes mostly connected with each other and a big immaculate area present distal to the median nygma, the strongly inflated male ninth gonocoxite, and the slenderly elongate male tenth gonocoxite, which is incurved at base and outcurved at tip.

Description. Male. Body length 7.0 mm; forewing length 10.8 mm, hindwing length 8.4 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 6.0 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 anterior half brown, laterally with a pair of dark brown oblique stripes; metanotum pale yellowish brown, slight darker on lateral margins. Legs pale yellow, femora blackish brown at tip. Wings transparent, slightly brown. Forewing ~2.0 times as long as wide, with many dark patches, most patches connected with each other, proximal spots slightly darker, arranging as transversely arcuate pattern, a big immaculate area present distal to median nygma; two nygmata present on proximal and median portion of forewing and accompanied with a large brownish marking. Hindwing ~1.9 times as long as wide, much paler than forewing; 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 four main branches. Hindwing with trichosors present along wing margin between R and CuA; Rs with five main branches.

Abdomen yellow, pregenital segments dorsally pale yellowish brown. Ninth tergite in dorsal view with a shallowly arcuate anterior incision and a nearly U-shaped posterior incision, leaving a pair of broad hemitergites, which are obtuse distally and densely haired ( Fig. 102 ); in lateral view broad ( Fig. 104 ), with straight ventral margin and arcuate posterior margin. Ninth sternite much shorter than ninth tergite, arcuately convex posteriad. Ectoproct in dorsal view posterodorsally with a pair of unguiform projections curved downward, posteroventrally with a pair of bifid unguiform projections and a feebly sclerotized, digitiform projection. Ninth gonocoxite ( Fig. 102 ) strongly inflated, with unguiform tip curved outward; tenth gonocoxite slenderly elongate, incurved at base, with unguiform tip, submedially with a lobe connecting to ninth gonocoxite; gonarcus slendely beam-shaped, laterally connecting to bases of ninth gonocoxites. Hypandrium internum nearly trapezoidal, with lateral margins slightly arcuate.

Female. Body length 5.6 mm; forewing length 12.5 mm, hindwing length 10.8 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 ovoid in lateral view, with posterior half slightly narrowed, which is obvious in ventral view, anterior half laterally with a pair of sclerotized strips; bursal accessory gland paired, ovoid. Ectoproct small, ovoid.

Materials examined. Holotype ♂, CHINA: Yunnan Province, Baoshan, Nankang [24°49′N, 98°46′E], 1900 m, 14.V.2006, Xingyue Liu ( CAU). Paratype 1♀, CHINA: Yunnan Province, Baoshan, Nankang [24°49′N, 98°46′E], 1900 m, 14.V.2006, Xingyue Liu ( CAU).

Distribution. China (Yunnan).

Etymology. The specific epithet ‘ maculosus ’ refers to the forewings with a large number of dark brownish spots, most of which are connected with each other.

Remarks. This species resembles D. nobilis sp. nov. in having similarly particular forewing marking patterns, with many dark patches mostly connected with each other and with a big immaculate area distal to the median nygma. However, the new species should not be closely related to the latter species based on completely different male genitalia. Moreover, the new species differs from all other Dilar species by the male ninth gonocoxite, which is strongly inflated, with simply tapering and laterally curved tip, and by the slenderly elongate male tenth gonocoxite which is submedially with a lobe connecting to ninth gonocoxite.

Figures

FIGURE 19. Adults of Dilar spp. 19. D. maculosus sp. nov., male holotype. Scale bars: 1.0 mm.

FIGURES 102 – 107. Dilar maculosus sp. nov. 102. Male genitalia, dorsal view; 103. Male genitalia, ventral view; 104. Male genitalia, lateral view; 105. Male ectoproct, caudal view. 106. Female genitalia, lateral view; 107. Female genitalia, ventral view. Scale bars: 0.5 mm.