Yunnantettix thaicus Storozhenko et Pushkar, 2015

Storozhenko, S. Yu. & Pushkar, T. I., 2015, Taxonomic Review Of The Genus Yunnantettix (Orthoptera, Tetrigidae) From The Oriental Region, Vestnik Zoologii 49 (3), pp. 211-218 : 213-216

Yunnantettix thaicus Storozhenko et Pushkar , sp. n., fig. 1–15

M a t e r i a l. Holotype ♂: Thailand: Province Nakhon Ratchasima , environs of National Park Khao Yai , 500–1000 m, 26.10– 4.11.2000 (A. V. Gorochov, L. N. Anisyutkin) . Paratype ♀: Th ailand: Province Loei, Phu Reua , 735 m, 26.05.2010 ( V. G. Bezborodov) ( ZISP) .

D i a g n o s i s. The new species differs from all the other species of this genus by the shallow excision on the apex of the posterior pronotal process and by the shape of the external lateral pronotal carina, which are arch-like and strongly curved upward above the tegmen.

D e s c r i p t i o n. Male. Fastigium of vertex in dorsal view between eyes 2.8 times as wide as eye, anterior margin of fastigium broadly rounded, reaching further than anterior edge of eye. Frontal ridge in lateral view with two shallow excisions: between lateral ocelli and below antennal socket; in frontal view, with distinctly divergent and smooth lateral carinae; frontal ridge between bases of antennae 2.5 times as wide as antennal socket; median furrow distinct above median ocellus. Median carina of frontal ridge 2.2 times as long as width of first antennal segment. Mid segments of antenna 4.5– 5.5 times as long as wide. Prozona 1.4 times as wide as long. Median carina of pronotum in lateral view almost straight in front of tegmen, but slightly concave near shoulders, and sinuous posteriorly. Prozonal lateral carina serrate; interhumeral carinae between shoulders short, parallel; external lateral carina almost reaching apex of pronotum and strongly curved upward above tegmen. Apex of posterior pronotal process in dorsal view shallowly excised. Tegmen narrow, its visible part 3.6 times as long as wide and 3.2 times narrower than maximal width of mid femur. Hind wing absent. Fore femur 3.3 times as long as wide, with slightly sinuate and finely dentate lower carina; mid femur 2.9 times as long as wide, with distinctly sinuate lower carina. Basitarsus of fore leg considerably shorter than second tarsal segment (without claws). Hind femur stout, 2.6 times as long as wide; upper and lower carina slightly granulated. Upper margin of hind tibia finely serrated, with 5–6 outer and 4 inner teeth. Basitarsus of hind leg 2.3 times as long as third tarsal segment (without claws); all basal pads of basitarsus almost equal. Epiproct narrow, 2.1 times as long as wide near base. Subgenital plate in ventral view 1.4 times as long as wide; in lateral view 1.4 times as long as tall, with slightly excised apex. Cerci conical with a narrowly rounded apex, 1.9 times as long as wide near base.

Рис. 1–13. Yunnantettix thaicus sp. n.: 1 — голова и переднеспинка самца, вид сбоку; 2 — передняя часть переднеспинки самки, вид сбоку; 3 — голова и передняя часть переднеспинки самца, вид сверху; 4 — голова самца, вид спереди; 5 — усик самки, вид сверху; 6 — заднее бедро самца, вид сбоку; 7 — переднее бедро самца, вид сбоку; 8 — задняя лапка самца, вид сбоку; 9 — вершина брюшка самца, вид сбоку; 10 — то же, вид сверху; 11 — то же, вид снизу; 12 — вершина брюшка самки, вид сбоку; 13 — 7-й стернит и генитальная пластинка самки, вид снизу. Масштабные линейки 1 мм.

Рис. 14–15. Yunnantettix thaicus sp. n.: 14 — самец, общий вид сверху; 15 — самка, общий вид сбоку.

Body ferruginous brown, with blackish spots. Antenna brown; apices of segments with narrow light rings. Posterior pronotal process with light brown area between internal and external lateral carinae. Visible part of tegmen dark brown without spots. Fore and mid tibiae light brown with two blackish rings. Fore tarsus blackish, second segment with broad whitish ring near middle; claws light brown. Hind femur ferruginous brown. Hind tibia brown with two light rings, one in basal third and another in apical third of tibia. Basitarsus of hind leg brown, second tarsal segment blackish, third segment also blackish, but with broad brown ring near middle; claws light brown. Lateral sides of tergites black with light brown longitudinal stripes. Sternites brown, except ninth sternite and subgenital plate blackish brown. Epiproct and cerci brown.

Female. Similar to male, but smaller. Fastigium of vertex in dorsal view between eyes 2.7 times as wide as eye. Frontal ridge same as in male; frontal ridge between bases of antennae 2.5 times as wide as antennal socket; median furrow distinct. Median carina of frontal ridge 2.0 times as long as width of first antennal segment. Mid segments of antenna 4.0–4.8 times as long as wide. Prozona 1.5 times as wide as long. Median carina, interhumeral carina and external lateral carina of pronotum as in male; prozonal lateral carina smooth. Visible part of tegmen 3.5 times as long as wide, and 3.0 times narrower than maximal width of mid femur. Hind wing absent. Fore and mid leg as in male, fore femur 3.0 times, mid femur 2.6 times, hind femur 2.5 times as long as wide. Upper margin of hind tibia with 6–7 outer and 3 inner teeth. Basitarsus of hind leg 2.2 times longer than third tarsal segment (without claws); basal pads of basitarsus as in male. Subgenital plate 1.1 times as wide as long. Cerci with narrowly rounded apex, 1.4 times as long as wide near base. Upper valve of ovipositor 3.0 times as long as maximum width. Lower valve of ovipositor 4.6 times as long as maximum width.

Рис. 16–20. Yunnantettix bannanensis , самец (16–17) and Y. elytratus , самка (18–20): 16, 18 — голова и переднеспинка, вид сбоку; 17 — общий вид сверху; 19 — голова и переднеспинка, вид сверху; 20 — голова, вид спереди (16–17 по: Zheng, 1995; 18–19 по: Günther, 1939, с изменениями; 20 по: Shishodia, 1991).

Coloured as male, but second segment of fore and mid tarsi, as well as third segment of hind tarsus with broad light brown ring near middle. Hind tibia brown with light ring in basal third. Subgenital plate, epiproct and ovipositor blackish brown.

M e a s u r e m e n t s. Length: body (from frontal ridge to apex of subgenital plate): ♂ 9.5, ♀ 9.3; pronotum: ♂ 8.1, ♀ 8.0; antenna: ♂ 2.5, ♀ 2.6; tegmen: ♂ 0.9, ♀ 0.7; fore femur: ♂ 2.0, ♀ 1.8; mid femur: ♂ 2.3, ♀ 2.1; hind femur: ♂ 5.7, ♀ 5.5; ovipositor 1.1.

D i s t r i b u t i o n. Thailand (Provinces Nakhon Ratchasima and Loei).

E t y m o l o g y. The new species is named thaicus (adjective masculine) after the type locality.

Figures

Fig. 1–13. Yunnantettix thaicus sp. n.: 1 — male head and pronotum, lateral view; 2 — female anterior part of pronotum, lateral view; 3 — male head and anterior part of pronotum, dorsal view; 4 — male head, frontal view; 5 — female antenna, dorsal view; 6 — male hind femur, lateral view; 7 — male fore femur, lateral view; 8 — male hind tarsus, lateral view; 9 — male apex of abdomen, lateral view; 10 — the same, dorsal view; 11 — the same, ventral view; 12 — female apex of abdomen, lateral view; 13 — female 7th sternite and subgenital plate, ventral view. Scale bars 1 mm.

Fig. 14–15. Yunnantettix thaicus sp. n.: 14 — male body, dorsal view; 15 — female, lateral view.