Osmylus verticalis Li, Zheng, Wang and Liu, 2025

Li, Zechuan, Zheng, Yuchen, Wang, Yongjie & Liu, Xingyue, 2025, A revision of the Osmylus hyalinatus species group (Neuroptera: Osmylidae), with description of seven new species, Journal of Natural History 59 (13 - 16), pp. 849-893 : 877-879

Osmylus verticalis Li, Zheng, Wang and Liu sp. n.

LSID: urn:lsid:zoobank.org:act:5D340748-732D-45C8-8FDC-778614895B83

( Figures 9 , 14E )

Diagnosis

Head yellow to yellowish brown; vertex dark brown, anteriorly with a pale transversal band. Pronotum reddish brown with some irregularly shaped dark brown markings. Fore wing gradate series area to apex with several dots, arranged along outer gradate series; distal MP and Cu area with brown dots. Male tergum 9 with a short triangular process, extended dorsad, nearly as long as wide in lateral view; male gonocoxites 9 with two pairs of tubercles, posterior pair larger than anterior pair, posterior pair is triangular while anterior pair is digitiform in lateral view; in ventral view forming a deep V-shaped structure, posterior pair of tubercles extended anterolaterally; gonocoxites 10 curved sharply.

Description

Head width 2.5 mm; fore wing length 27.7 mm; hind wing length 24.2 mm.

Head. ( Figure 9C ) Yellow to yellowish brown. Vertex dark brown, anteriorly with a pale transversal band, hairless. Ocelli distinct, relatively small, between antennae with a dark triangular marking. Scape brown, pedicel black; flagellum black, filiform. Frons and clypeus yellow, lateral margin with a pair of dark dots, covered with some yellowish-brown setae. Labrum with white markings. Mandibles basally brown, distally dark brown.

Thorax. ( Figure 9B ) Pronotum reddish brown with some irregularly shaped dark markings. Meso- and metanotum reddish brown with some dark markings, covered with many dark setae.

Legs. Long and slender, yellow, protibiae dark along outer margin, covered with short setae. Tibia nearly twice as long as femur,tarsomere 1 relatively longer,nearly as long as entire length of tarsomeres 2–4; pretarsal claws curved. Metatibia longer than that of fore- and midlegs.

Wings. Ovoid, hyaline, relatively broad. Fore wing gradate series area to apex with four dots, arranged along out gradate series; distal MP and Cu area with brown dots; costal space broad basally, subcostal veinlets basally connected by some short oblique crossveins; RP with 16 branches; RP1 originating near origin of RP, M fork close to origin of RP1; two distinct gradate series present; CuP with numerous crossveins; A1 and A2 with pectinate branches and crossveins. Hind wing subcostal veinlets without interlinked crossvein.

Abdomen. Yellowish brown to dark brown, covered with yellowish-brown setae. Male genitalia ( Figure 9D, E ): Tergum 8 long, scent gland large and ovoid. Tergum 9 with a short triangular process, extended dorsad, nearly as long as wide in lateral view. Gonocoxites 9 slightly sclerotised distally, with two pairs of tubercles, posterior pair larger than anterior pair, posterior pair is triangular in lateral view while anterior pair is digitiform; in ventral view forming a deep V-shaped structure, posterior pair of tubercles extended anterolaterally; gonocoxites 10 ( Figure 14E ) curved sharply. Female genitalia: Unknown.

Type material

Holotype ♂, CHINA: Xizang, Nyingchi, Medog County [墨脱县], Pelung Village [排龙村], 2036 m, 24 July 2018, leg. Xingyue Liu ( CAU).

Distribution

China (Xizang).

Etymology

This new species is named after the vertical process of male tergum 9.

Remarks

This new species is similar to O. atomatus . However, in O. verticalis sp. n., the fore wing dots are fewer and smaller; the process of male tergum 9 is short, triangular, and extends dorsad, the posterior tubercle of male gonocoxites 9 is triangular and the anterior tubercle is digitiform and more widely spaced. In O. atomatus , there are numerous larger fore wing dots; the process of male tergum 9 is long, triangular, and extends posterodorsally, and the tubercles of male gonocoxites 9 are digitiform and closely positioned in lateral view.

Figures

Figure 9. Osmylus verticalis Li, Zheng, Wang and Liu sp. n. A. habitus; B. head and thorax, dorsal view; C. head; D. male genitalia, lateral view; E. male genitalia, ventral view. Scale bars: A = 10.0 mm; B = 2.0 mm; C = 1.0 mm; D–G = 0.5 mm.

Figure 14. Male gonocoxites 10 and female spermatheca. A, J. O. atomatus; B, K. O. decoratus; C, L. O. flaviantennatus sp. n.; D, M. O. gaoligongensis sp. n.; E. O. verticalis sp. n.; N. O. trituberatus sp. n.; F. O. wenii sp. n.; G, O. O. xiaohongae sp. n.; H, P. O. qinlinganus sp. n.; I, Q. O. zheanus.