Toxorhina (Ceratocheilus) pianmica Xu, Lv & Zhang 2024, sp. nov.
Creators: name: Lv, Hanhuiying
name: Xu, Yuanyuan
name: Liu, Shulin
name: Li, Linghui
name: Lin, Kejian
name: Zhang, Xiao
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Toxorhina
Toxorhina pianmica

description: Toxorhina (Ceratocheilus) pianmica Xu, Lv & Zhang sp. nov.
Figs 4, 5
Type material.
Holotype. China • ♂; Yunnan Province, Lushui County, Pianma Town; 2123 m a. s. l.; 26.0142 ° N, 98.6272 ° E; 6 July 2013; Xuankun Li leg.; light trap; CAU. Paratypes. China • 3 ♂♂; same data as for holotype; CAU.
Diagnosis.
Prescutum and presutural scutum dark brown with edges of prescutal suture and both sides of caudal edge darker (Fig. 4 C). Pleuron dark brown. Wing with cell d open by absence of m-m. R 4 ending slightly before end of basal section of R 5, m-cu before fork of M by about 1 / 3 of its own length. Gonocoxite with 1 gonostylus. Gonocoxite dorsally with three brownish-black, stout preapical setae, and a blunt lobe at inside of base; the lobe with nine stout setae. Interbase elongated, rod-shaped. Tip of aedeagus bifid with arms short and divergent.
Description.
Male (Fig. 4 A). Body length 4.4–4.9 mm (excluding rostrum), wing length 4.5–5.0 mm, rostrum length 2.7–3.0 mm, halter length 0.6–0.7 mm.
Head (Fig. 4 B). Dark brown. Setae on head dark brown. Antenna with scape pale brown, pedicel and first flagellomere brown, remaining flagellomeres pale brown. Scape short cylindrical, with dark brown setae. Pedicel globular, with dark brown setae. First flagellomere oval, remaining flagellomeres cylindrical; terminal two flagellomeres longest with pale brown verticils. Rostrum about 3 / 5 of length of wing, brown with dark brown setae.
Thorax (Fig. 4 C). Pronotum brown. Prescutum and presutural scutum dark brown, with edges of prescutal suture and both sides of caudal edge darker. Postsutural scutum dark brown, paler in middle area. Scutellum dark brown with side and caudal edges black, paler in middle area. Mediotergite brown with side edges brownish-black. Pleuron dark brown (Fig. 4 A). Coxae yellow with bases brown; trochanters yellow; femora brown with bases paler; tibiae brown; base of fore tarsus brown, remaining tarsi missing. Setae on legs brown. Wing (Fig. 4 D) pale brown, without stigma. Veins brown. Venation: Sc ending slightly beyond origin of Rs; sc-r a great distance before tip of Sc; R 4 ending slightly before end of basal section of R 5; distal section of R 5 approach M 1 + 2 toward tip; CuP curved suddenly at middle; cell d open by absence of m-m; m-cu before fork of M by about 1 / 3 its own length. Halter yellow.
Abdomen (Fig. 4 A). Segments 1–6 brown with caudal edges darker, segments 7–8 dark brown.
Hypopygium (Fig. 5). Tergite 9 dark brown with dark brown setae, posterior margin with two large translucent areas on both sides (Fig. 5 A, E). Gonocoxite brown, conical with tip round (Fig. 5 A, B); dorsal face with a few sparse brown setae at outside, three brownish-black, stout preapical setae (Fig. 5 A, F), and a blunt lobe at inside of base, this lobe with nine stout setae (Fig. 5 A, G); ventral face with numerous brown setae at inside (Fig. 5 B). Gonostylus brownish-yellow, curved inwards at basal 1 / 3; the basal 1 / 3 stout with a longitudinal groove, distal 2 / 3 slender with tip round; outer side of basal 1 / 3 with outwardly curved spine (Fig. 5 A, B, H). Interbase pale brownish-yellow, elongated, rod-shaped, about 10 times as long as wide; tip inflated and round (Fig. 5 A – D). Parameres dark brown, medially arched fused, distally connecting to base of interbase (Fig. 5 C, D). Ejaculatory apodeme dark brown except pale base, rod-shaped (Fig. 5 C, D). Aedeagus dark brown, stout at base, tip bifid with arms short and divergent (Fig. 5 A – D, I).
Female. Unknown.
Etymology.
The species is named after the type locality, Pianma Town.
Distribution.
China (Yunnan).
Behavior.
The species can be attracted by light.
Remarks.
The new species is similar to T. (C.) simplicistyla Alexander, 1967 from India in having similar wing venation, but can be separated by the brown abdomen with segments 7–8 darker (Fig. 4 A), the gonostylus conspicuously curved with a spine at the basal 1 / 3 (Fig. 5 A, B, H), and the interbase with the tip inflated (Fig. 5 A – D). In T. (C.) simplicistyla, the abdomen is brownish-black, the gonostylus is very gently curved with a spine near the middle, and the tip of the interbase is not inflated (Alexander 1967).
description: Published as part of Lv, Hanhuiying, Xu, Yuanyuan, Liu, Shulin, Li, Linghui, Lin, Kejian & Zhang, Xiao, 2024, An updated review of the genus Toxorhina Loew, 1850 (Diptera, Limoniidae) from Yunnan, China with a description of a new species, pp. 191-204 in ZooKeys 1205 on pages 191-204, DOI: 10.3897/zookeys.1205.117807