Xya xishangbanna, Cao & Rong & Naveed, 2020
Cao, Chengquan, Rong, Hua & Naveed, Hassan, 2020, Two new species of the genus Xya Latreille, 1809 (Orthoptera, Tridactyloidea, Tridactylidae) from Yunnan with a key to all Xya species in China, ZooKeys 947, pp. 103-112: 103
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Holotype: China • ♂; Yunnan Province, Xishuangbanna, Mengla County, Wuxiangguangchang; 21.92N, 101.11E; 21-24 Mar. 2019; leg. Chao Tong and Shenzhi Chen.
China • 1♀, same data as holotype.
Male. Habitus with bright or shiny surface. Head black with brown band along inner margin of compound eyes. Antennae moniliform, black, 10 segments, length of each antennomere almost equal to width. Compound eyes dark brown to black, 2 times broader than longer, rounded in front. Ocelli grayish white. Gena black.
Thorax. Pronotum black, width about 1.25 times length, yellow on ventral margin. Forewings blackish-brown, with pair of basal and medial brown spots. Hindwings yellowish-white, extending beyond the end of abdomen distinctly. Fore and mid legs dark brown with yellow spots. Hind legs with femora dark brown, dorsal margin black, with yellowish-white spots; hind tibiae yellowish-brown, with three (inside) and four (outside) pairs of articulated lamellae.
Abdomen. Abdomen black, gray along posterior margin of each segment. Apex of every sternite with distinct transverse white stripe. Cerci black, paraproctal lobe slightly lighter in coloration than cerci. Epiproct with bottom of the middle “v-shaped” crack in the upper part shallow, and sides straight (Fig. 13A View Figure 13 ). Female. Body larger than male in size. Abdominal segments black with posterior margin gray for each segment. Epiproct rounded. Subgenital plate margin with a notch. Others same as male.
Length of body: ♂ 5.63, ♀ 7.16. Length of fore wing: ♂ 1.59, ♀ 2.37. Length of hind wing: ♂ 4.84, ♀ 6.28. Length of hind femur: ♂ 3.76, ♀ 4.50.
This species can be diagnosed by the shiny dark brown hind femora. It is most similar to X. leshanensis Cao et al. in the compound eyes with a narrow band along the inner margin. It can be distinguished from the latter by the body with dorsal surface not rough, but more shiny; the compound eyes with a prominent brown band along their inner margin on both sides; the hind femora dark brown, with a pair of white and yellow longitudinal spots; forewings with a pair of basal and apical brownish spots; the length of hind wing more than 4.0 mm; and the epiproct with shallow bottom of the middle “v-shaped” crack in the upper part, and straight sides. In X. leshanensis , the body surface is rough; the compound eyes bear a yellowish-white band along the inner margin; the hind femora are black, bearing four yellowish-white spots near the middle; the forewings have no spot; the length of hind wings is less than 4.0 mm; and the epiproct has deep “v-shaped” crack in the upper part with the sides curved (Fig. 13B View Figure 13 ). Major differences are listed in Table 1.
The specific epithet is named after Xishuangbanna, the type locality.
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