Xya huidongensis Cao, Chen & Yin, 2025, sp. nov.
Creators: name: Cao, Cheng-Quan
name: Chen, Shen-Zhi
name: Yin, Zhan
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tridactylidae
Xya
Xya huidongensis

description: Xya huidongensis sp. nov.
(Fig. 1)
Holotype. ♀, paratypes 3 ♀♀, 5 ♂♂, China, Sichuan, Liangshan, Huidong County, 26°30′ N, 102°50′E, 1761m, 15.Feb.2017, collected by Mao Xiang-Min.
Female Head black, with longitudinal white line at inner margin of eye. Antennae black, slightly moniliform, 10 segments. Yellow line from lateral ocelli reaching to the hind margin of head. 3 ocelli yellow, placed near lower margin of eye. Pronotum black, with yellow broad stripe on both side and four yellow spots on the back, anterior two almost square, posterior two small. Profemur longer than protibiae. Procoxa black. Protrochanter light brown. Profemur dark brown with orange margins, ventral row of spines. Protibiae light brown, with four distal spines. Median femur dark, with a large yellow band in the middle and two small yellow at basal and apical part. Mesonotum and metanotum dark brown. Two tarsomeres, basitarsi ventrally with two structures ball-like. Middle legs longer than first pair legs. Mesofemur longer than mesotibiae, dark brown with orange band in the middle that reaches the apex, two small orange spots at base and apex. Mesocoxa black, mesotrochanter black, mesotibiae oblong, dark brown with a white longitudinal spot. Mesotarsal segments, basitarsus with two adhesive structures. Mestacoxa black, ventrally hyaline/white. Metafemur dark brown, with orange markings, dorsal and ventral band at first third of femur and at the second third, just before the medial lunar process, an inverted chek mark across the middle of the femur. Semilunar process dark brown. Hyaline ventral margin cover plat dark brown with a lack of pigmentation under the semilunar process and starting from the groove. Metatibiae light brown with white basal articulation, with 4 outer tibial lamellae and 3 inner lamellae, metatarsus absent. Subapical and apical spurs with small tooth. Apical spurs with distal inner setae. Tegmina short, reaching to the half of hind femur, dark brown with an orange spot along the anal margin, and a basal orange spot on both sides. Hind wing shorter than tegmen. Abdomen brown, subgenital plate rounded, with a wide notch, near notch light brown. Cerci 2 segnented, black. Brachium light brown, in lateral view with parallel sides. Epiproct pointed, tougue-shaped.
Male (Figs. 2–5) Head, pronotum and fore wings with luster. Head black with a narrow white band along inner margin of eye and with yellow stripe on both sides. Antennae black, moniliform, 10 segmented, length of joint almost equal to width. Ocellus small. Carinae from eye to vertex absent. Pronotum black with yellow stripe on both sides. Fore wing blackish-brwon, with two yellow spots on the base and apical part. Hind wing brown, reaching the end of abdomen. Fore leg and mid leg dark, with obscure white spots. Hind femur black with obvious yellow spot near the middle. Hind tibia dark brown, with a small white marking near base; tibial serrae small, with swimming plates and metatarsus absent. Cercus 2-segmented, black and anal appendages yellowish brown. Epiproct with a pair of small spines laterally directed on posterior angle, posterior margin curved.
Measurement (in mm): Length of body: ♂ 4.4–4.6, ♀ 5.6–5.7. Length of pronotum ♂ 1.1–1.2, ♀ 1.4–1.5. Length of tegmina: ♂ 1.2–1.3, ♀ 15–1.7. Length of hind wing: ♂ 2.1–2.2, ♀ 3.0–3.1. Hind femora: ♂ 2.6–2.8, ♀ 3.2–3.4.
Diagnosis. The new species is similar to Xya fujianensis Cao, et al, 2020. The major differences are listed in Table 1.
Etymology The specific epithet is named for the type locality Huidong.
description: Published as part of Cao, Cheng-Quan, Chen, Shen-Zhi & Yin, Zhan, 2025, A new species of the genus Xya Latreille, 1809 from China (Orthoptera, Trydctyloidea, Trydactylidae), pp. 289-293 in Zootaxa 5590 (2) on pages 289-291, DOI: 10.11646/zootaxa.5590.2.9, http://zenodo.org/record/14953124