Yunnantettix Zheng, 1995

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 : 212-213

Genus Yunnantettix Zheng, 1995

Yunnantettix Zheng, 1995: 344 ; Liang, Zheng, 1998: 36; Zheng, 2005: 34; Liang et al., 2009: 258.

T y p e s p e c i e s: Yunnantettix bannaensis Zheng, 1995 , by original designation.

R e d e s c r i p t i o n. Body of moderate size, robust ( fig. 14, 15 ). Head not protruding above pronotum in lateral view (((fig fig fig... 1 1 1 )))... A ntenna fili form, 15 -segmented ( fig. 5 ), 1.3 – 1.4 times as long as fore femur; antennal socket situated at level of lower margin of eye ( fig. 4 ). E ye s ubglobular, n ot p rotruding a bove v ertex i n l ateral v iew ( fig. 1 ). Fa stigium of vertex in dorsal view between eyes considerably broader than width of eye, anterior margin of fastigium broadly rounded or angularly protruded in middle part; median fastigial carinula visible anteriorly, lateral fastigial carinula broadly rounded, supraocular lobe distinct ( fig. 3 ); in lateral view fastigium protruded anteriorly about half or less of eye diameter ( fig. 1 ). F rontal r idge i n l ateral v iew w ith t wo s hallow e xcisions, o ne n ear lateral ocellus and another below antennal socket ( fig. 1 ). Frontal ridge between bases of antennae 2.5 times as wide as fi rst antennal segment; lateral ocellus placed near midlength of eye (fi g. 4, 5). Apical segments of maxillary palp not widened. Pronotum in dorsal view with straight anterior margin; posterior pronotal process reaching abdominal apex or farther, but not apex of hind femur; posterior process apex excised or rounded ( fig. 17, 19 ). Disc of pronotum depressed behind prozona and behind shoulders; prozona and area between shoulders convex; pronotal process with thick callosities and rugosities ( fig. 15 ). Median carina of pronotum in lateral view rather low, lamellate, smooth in anterior half and sinuous posteriorly ( fig. 1 , 16, 18 ); prozonal lateral carina elevated; humero-apical carina short, internal lateral carina reaching apex of pronotal process; external lateral carina almost straight or arch-like in anterior half; interhumeral carina distinct but short. Hind margin of lateral lobe of pronotum bisinuate, tegminal (upper) sinus shallow; lower sinus deep (fi g. 1, 2, 3); lower part of lateral lobe directed downward (typical for Cladonotinae ), with rounded or obliquely truncate apex. Tegmen elongated, narrow, width of visible part of tegmen considerably less than width of mid femur; hind wing absent. Fore and mid femora with slightly sinuate lower carina ( fig. 7 ); hind femur stout, 2.3–2.6 times as long as wide ( fig. 6 ). Basitarsus of hind leg considerably longer than third tarsal segment (without claws) ( fig. 8 ). Male epiproct long, lingua-like ( fig. 10 ). Male subgenital plate short, triangular in lateral view ( fig. 9 ), ventral side with distinct median carinula ( fig. 11 ). Female subgenital plate with angularly rounded posterior margin, median carinula weak ( fig. 13 ). Valves of ovipositor narrow, dentate ( fig. 12 ). Colour of body dark brown or ferruginous.

C o m p a r i s o n. The genus Yunnantettix is similar to Epitettix Hancock, 1907 with twelve species occurring in Malaysia (Borneo), Indonesia (Java), PapuaNew Guinea, Vietnam, India and Madagascar (Storozhenko, 2012; Storozhenko, Dawwrueng, 2014; Eades et al., 2015), Pseudepitettix Zheng, 1995 , with six species from China and Thailand (Zheng, 1995; Zheng, 2005; Storozhenko et Dawwrueng, 2014; Eades et al., 2015), and monotypic Aspiditettix Liang, 2009 from China (Liang et al., 2009). Yunnantettix is similar to Pseudepitettix and Epitettix in the moderately widened frontal ridge and low median carina of pronotum but differs from the latter by the presence of a narrow tegmen and a shallow but distinct tegminal sinus on the lateral lobe of the pronotum (in Epitettix and Pseudepitettix the tegmen is absent and the lateral lobe of the pronotum with lower sinus only). Yunnantettix is the most similar to Aspiditettix in the general appearance, the rugose disc of the pronotum, and the bisinuate lateral lobe of the pronotum but differs from it by the completely reduced hind wing and the position of the antennal socket (in Aspiditettix , the hind wing almost reaches the apex of the pronotum and the antennal socket is situated distinctly below the lower margin of the eye).

The genera Epitettix , Yunnantettix , Pseudepitettix , and Aspiditettix form a group of similar genera in the tribe of Cladonotini , but the actual phylogenetic relationships of the species included in these four genera need an additional study based on a critical examination of all the described species.

The genus Yunnantettix includes three species occurring in India, China and Thailand. The description of the new species, a list of the species of genus, and a key to species are given below.

Figures

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

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. 16–20. Yunnantettix bannanensis, male (16–17) and Y. elytratus, female (18–20): 16, 18 — head and pronotum, lateral view; 17 — body, dorsal view; 19 — head and pronotum, dorsal view; 20 — head, frontal view (16–17 after Zheng, 1995; 18–19 after Günther, 1939, with modification; 20 after Shishodia, 1991).