Eustrangalis (Eustrangalis) fuscisuturalis Wang & Xie & Wang 2024, sp. nov.
Creators: name: Wang, Yingqi
name: Xie, Guanglin
name: Wang, Wenkai
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Eustrangalis
Eustrangalis fuscisuturalis

description: Eustrangalis (Eustrangalis) fuscisuturalis sp. nov. ḃDz真AEħ牛
(Figs 2a, b, 3a, 4, 5a, c)
Description. Male. Body length 14.0–16.0 mm, humeral width 3.0– 3.5 mm. Body mostly yellowish-brown, with blackish-brown to black stripes and recumbent short yellowish-brown setae. Head mostly dull yellowish-brown, clothed with some yellowish-brown hairs on vertex; apex of labrum and half apex of mandibles blackish-brown; occiput with a broad black stripe that extends narrowly forwards along the margins of each upper eye lobe to the vertex, sometimes not extending forwards (Fig. 4c, d); vertex and occiput sometimes mostly blackish-brown (Fig. 4e, f). Antennae yellowish-brown, slightly lighter towards apex. Pronotum mostly yellowish-brown, clothed with a recumbent yellowish-brown seta in each punctation and provided with a conspicuous longitudinal black stripe on each side, the black stripe sometimes occupying the most of pronotum (Fig. 4e, f). Elytra slightly lighter in colour than head and pronotum; each elytron with a distinct blackish-brown longitudinal stripe from humeri extending backwards to apex, sometimes the strip gradually light chestnut in colour from behind the shoulder backwards to the apex (Fig. 4a–f); the suture entirely blackish-brown to chestnut, epipleuron behind basal fourth blackish-brown to chestnut; each punctation bears a recumbent short yellowish-brown seta. Abdominal ventral surface darker than that of head and thorax. Setae on ventral surface of meso- and metathorax denser and longer than those on abdominal ventral surface.
Head densely punctate, more sparsely and coarsely on clypeus, with a smooth, impunctate, subsemicircular region on the middle of the apical frons. Antennae slightly exceeding elytral apices; scape distinctly curved and thickened towards apex in lateral view, slightly shorter than antennomere III; antennomere V longest; relative lengths from antennomeres I to XI as follows: 27: 5: 28: 25: 34: 30: 29: 26: 25: 24: 26.
Pronotum densely punctate, slightly longer than basal width, deeply constricted at apical fifth and moderately so at basal fourth; disc convex above and roundly prominent laterally, with a smooth, glabrous, narrow central region; base distinctly bisinuate. Elytra about 3.1 times as long as humeral width, straightly convergent from humeri towards apex; disc longitudinally depressed along suture, with deep punctures which are coarser and sparser than those of head and pronotum, and becoming shallower towards apex; apex obliquely emarginate, with sharply toothed outer angle and pointed inner angle.
Metaventrite thick, strongly convex beneath, finely punctate and provided with a pair of longitudinally ridged small projections beside median line at posterior half. Abdomen sparsely and finely punctate; apical region of fifth ventrite triangularly depressed on centre, with slightly emarginate apical margin. Legs short and slender; metatibia inwardly thickened from about apical two-fifths; metatarsus with first tarsomere about 1.7 times as long as the next two combined.
Male genitalia. Tergite VIII (Fig. 5a) with both sides subparallel at basal half, then gradually curving towards apex; apex broadly rounded, clothed with short to medium straight setae on apical half except for a central glabrous triangular region. Tegmen yellowish brown, slightly bent in lateral view. Parameres (Fig. 5c) relatively short, moderately separated each other and slightly curved inward near apices; each one length 2.1 times as long as width, lateral edge partly dark brown, apex blunt rounded with several long setae.
Female. Unknown.
Material examined. Holotype (male), China: Hubei province, Yichang (đš), Dalaoling National Nature Reserve (kŧ岭), Zhucaogou (Bdz沟), alt. 1560 m, 1 May 2014, coll. Guanglin Xie. Paratypes: two males, same data as for the holotype; two males, China: Hubei province, Shengnongjia National Forest Park (ėƛ架), Yousongping (油松坪), 16 June 2022, coll. Weiwei Zhao; one male, China: Shaanxi province, Yangxian (洋县), Huayang town (华DDz), Hongshiyao (Ḧ石±), 33°38′24″N, 107°29′24″E, alt. 1270 m, 12 May 2018, coll. Lanbin Xiang; one male, China: Shaanxi province, Meixian (眉县), Yingtou town (üíDz), Honghegu National Forest Park (Ḧ河ĕ), 34°5′11″N, 107°45′23″E, alt. 1100 m, 5 May 2019, coll. Heng Xin. The holotype and paratypes are deposited in the Insect Collection, College of Agriculture, Yangtze University (YZU).
Distribution. China: Hubei, Shaanxi.
Etymology. The species name is a combination of the Latin word ‘fuscus’ and ‘sutura’, referring to the fuscous suture of the elytra.
Comments. The new species is similar to E. latericollis and E. distenioides. It differs from the former by the elytra with the distinct blackis-brown to chestnut longitudinal stripes from the humeri to apices, the suture and epipleuron blackish-brown to chestnut, the tergite VIII with more broadly rounded apex, parameres shorter (length/ width ratio about 2.1), while in E. latericollis, the elytra are black only on humeri, the suture is blackish-brown to black only a short distance after scutellum, the length/width ratio of the paramere is about 3.2. It is different from the latter by the antennae yellowish-brown, the pronotum with the black stripe extending to the base and apex and the abdomen entirely dull yellowish-brown.
The new species was captured on the flowers of Litsea ichangensis Gamble and Cornus alba Linnaeus, two of the currently known plants whose flowers are visited.
description: Published as part of Wang, Yingqi, Xie, Guanglin & Wang, Wenkai, 2024, New data on the genus Eustrangalis Bates from China (Coleoptera: Cerambycidae, Lepturinae), pp. 558-566 in Zootaxa 5453 (4) on pages 561-566, DOI: 10.11646/zootaxa.5453.4.6, http://zenodo.org/record/11239816