Xya leshanensis, Cao, Cheng-Quan, Shi, Jian-Ping & Hu, Yu-Lin, 2017

Cao, Cheng-Quan, Shi, Jian-Ping & Hu, Yu-Lin, 2017, A new species of the genus Xya Latreille, 1809 (Orthoptera, Tridactyloidea, Tridactylidae) from Sichuan, China, Zootaxa 4247 (2), pp. 185-188 : 185-187

Xya leshanensis sp. nov. ( Figs. 1–7 )

Holotype ♂, paratypes 2♂, 1♀, Sichuan, Leshan, Luxin Park, 29°57´N, 103°77´E, 2016-8-11, collected by Cao Cheng- Quan.

Male Body without luster. Head black with a narrow yellowish-white band along inner margin of eye. Antennae black, 10-segmented, filiform, apical part of joint almost as same as basal part in width. Compound eyes black or light white. Three ocelli, white and small. Carinae from eye to vertex mostly absent. Width of pronotum 1.25 times its length. Fore wings blackish-brown. Hind wings yellowish-white, very long, extending over the end of abdomen distinctly. Fore legs and mid legs dark, with obscure white markings. Femur of hind legs black, with four yellowish-white spots near the middle, at the pre-knee and near the end separately. Tibia of hind leg dark with a small white marking near base, tibial serrae small, with three (inside) and four (outside) pairs of articulated lamellae. Cercus and stylus black. Epiproct with a pair of large spines laterally directed on posterior angle, apical half narrow distinctly. Every sternum ends with a distinct white stripe.

Female Body larger than male in size. Abdominal segments black, a notch on mesal posterior margin of 8th sternum absent. Epiproct rounded. Others as same as male.

Measurement (mm): Length of body: ♂ 4.0 – 5.28, ♀ 5.95 – 6.11. Length of fore wing: ♂ 1.04 – 1.36, ♀ 2.05 – 2.15. Length of hind wing: ♂ 3.17 – 3.60, ♀ 4.10 – 4.76. Length of hind femur: ♂ 2.62 – 3.20, ♀ 3.35 – 4.34.

Diagnosis. The new species is similar to Xya nitobei (Shiraki, 1913) . The major differences are listed in Table 1 .

Xya leshanensis sp. nov. figs. 1 – 7 Xya nitobei (Shiraki, 1913) figs. 8, 9 Bionomics. The new species lives on the river bank with humid and soft sand, having many plants, especially potential food sources such as algae and moss ( Fig 10 ), and can also live in the humid and soft land without water nearby. The adult can be found from May to October, especially in July and August. They can build arch nests in the habitat and are good jumpers from the ground and water.

Etymology. The specific epithet is named for the type locality Leshan city.

Figures

FIGURE 10 Landscape habitat of Xya leshanensis sp. nov. (Leshan, Sichuan, China).

FIGURES 1 – 7. Xya leshanensis sp. nov. 1. Head in frontal view Ƌ; 2. Body in dorsal view Ƌ; 3. Hind wing Ƌ; 4. End of abdomen in dorsal view Ƌ; 5. Hind leg in lateral view Ƌ; 6. Body in lateral view ♀; 7. End of abdomen in ventral view ♀; 8. Xya nitobei (Shiraki, 1913) Body in dorsal view Ƌ; 9. Xya nitobei (Shiraki, 1913) Epiproct Ƌ (figs. 8, 9 after Murai, 2005).

Tables

TABLE 1. Comparison of Xya leshanensis sp. nov. and Xya nitobei (Shiraki, 1913)

Joint of antennae	Apical part almost as same as basal part in width	Apical part larger than basal part in width
Pronotum	Width 1.25 times length	Width 1.10 times length
Hind wing	Very long, distinctly extending over the end of abdomen.	Not reaching the end of abdomen
Hind femur	With four small yellowish-white spots on upper side	With a large yellowish-white spot on upper side
Epiproct	With a pair of large spines laterally directed on posterior angle, apical half distinctly narrow.	With a pair of small spines laterally directed on posterior angle, apical half not narrow.