Formosatettix xiai, Zheng, Fang-Qiang, Shi, Jianping & Yin, Zhan, 2015

Zheng, Fang-Qiang, Shi, Jianping & Yin, Zhan, 2015, Discovery of a new species of Formosatettix Tinkham, 1937 (Orthoptera, Tetrigoidea, Tetrigidae) from China, Zootaxa 3994 (1), pp. 145-150 : 146-148

Formosatettix xiai sp. n.

( Figs. 1–10 )

Holotype: ♂, paratypes 4 ♂, 2 ♀, Zhejiang, Tianmushan, Qinglianfeng (N 30°06′, E 119°01′, 1600m), 2012-5-21, collected by Zhang Dezhi.

Male ( Figs 1–7 ) Body small in size. Head shorter than pronotum. Frons oblique, frontal costa distinctly concave before lateral ocelli in profile, frontal ridge with percurrent longitudinal groove, width of frontal ridge equal to width of basal joint of antenna, anteriorly protruding between the bases of antennae and arched ventrally in profile. Vertex broad, flat, maximum width 2 times as wide as diameter of eye, slightly protruding anteriorly between eyes in profile. Eye not protruding above pronotum. Antennae slender, located in lower margin of eyes, length of a segment in the middle of antennae is about 5.0 times of its width. Median carina of pronotum reaching anterior margin, dorsally distinctly arcuate in profile, lateral carinae in prozona nearly parallel, anterior margin of pronotum protruding into obtuse angle, almost reaching the posterior margin of eye, posterior margin of lateral lobe of pronotum with only one hollow, inferior edge of hind pronotal process produced arcuately, lateral carinae of metazona also straight, the apex of pronotum acutely angular, not bilobate, reaching distal 2/3 of hind femur. Wings absent. Lower margin of fore and mid femora straight. Upper keel of hind femur serrated, hind tibiae with 9 spines on outer side and 8 spines on inner side. Arolium of tarsus very small. Cercus conical, with basal part widened distinctly. Subgenital plate triangular, apex pointed. Epiphallus as seen in figure 3. Phallic complex as seen in figure 4.

Female ( Figs 8–10 ) Body larger than male. Ovipositor valves narrower, length of upper valve is 3.0 times its width. Subgenital plate oblong, posterior margin with a prominent median triangle. Otherwise same as male.

Coloration: body yellowish-brown. Pronotum with one black spot on each side.

Length of body: ♂ 8.1−11.4 mm, ♀ 9.9−12.3 mm.

Length of pronotum: ♂ 6.1−8.3 mm, ♀ 7.7−9.4 mm.

Length of hind femur: ♂ 4.2−6.6 mm, ♀ 6.0− 7.3 mm.

The new species is allied to Formosatettix wulaoshanensis Zheng & Xu, 2010 , the major differences are listed in Table 1 .

The new species is also allied to Formosatettix tianmushanensis Zheng & Li, 2001 , the major differences are listed in Table 2 .

Etymology The species is named in honor of Prof. Kailing Xia for his contribution to the studies of Chinese Orthoptera fauna.

Figures

FIGURES 1 – 10 Formosatettix xiai sp. n. 1. Antennae ♂; 2. Body in dorsal view ♂; 3. Epiphallus; 4. Phallic complex; 5. Frontal ridge ♂; 6. Head in dorsal view ♂; 7. End of abdomen in lateral view ♂; 8. End of abdomen in ventral view ♀; 9. Body in lateral view ♀; 10. Ovipositor valves in lateral view.

Tables

TABLE 1. Comparison of F. x i ai sp. nov. and F. wulaoshanensis Zheng & Xu, 2010

	F. xiai sp.n.	F. wulaoshanensis Zheng & Xu
Apex of pronotum	reaching distal 2/3 of hind femur	reaching the knee of hind femur
Width of frontal ridge	equals the width of basal segment of antenna	1.5 times of basal segment of antenna
Length of a segment in the middle of antennae	5.0 times of width	3.5 times of width
Length of upper ovipositor valve	3 times its width	4 times its width
Lower margin of fore and mid femora	straight	with slow undulation
Pronotum back	with one black spot on each side	without black spots on both sides

TABLE 2. Comparison of F. x i ai sp. nov. and F. tianmushanensis Zheng & Li, 2001

	F. x i a i sp.n.	F. tianmushanensis Zheng & Li
Apex of pronotum	reaching the distal 2/3 of hind femur	reaching distal 3/4 hind femur
Width of frontal ridge	equals the width of basal antennal segment	2 times the width of basal antennal segment
Length of upper ovipositor valve	3 times its width	2 times its width
Length of a segment in the middle of antennae	5.0 times of width	4.0 times of width
Pronotum back	with one black spot on each side	with two black spots on each side