Kansua diebua Liu

Liu, Chunxiang, 2015, New species from the genera Kansua and Anatlanticus (Orhtoptera: Tettigoniidae) in China, Zootaxa 3925 (2), pp. 291-300 : 292-293

Kansua diebua Liu sp. n.

( Fig. 1 ; Fig. 2 A, E, H; Fig. 3 A; Fig. 4A; Fig. 5A, E, I, K)

Holotype. Female, China: Gansu Province, Diebu County, Shuipogou, 2012. VII.4, Coll. Liu Chunxiang.

Paratype: 2 males, 1 female, same data as in holotype.

Diagnosis. A square area between extension of the first transverse sulcus and posterior margin of lateral lobes of pronotum not smooth, possessing numerous indefinite wrinkles ( Figs. 2 A, E, H).

Description. Holotype. Female. Head, vertex of frontis, vertex of fastiguim, compound eyes, occiput, and pronotum similar to that of Kansua hummeli . Tegmen extending behind middle, up to the seventh abdominal tergum, widened beyond the middle, with obliquely rounded apex; radial veins running along the subcostal vein in the middle; median veins running distantly from the radial veins from the middle to posterior margin ( Figs. 1 F,H, 2H). Hind wings rudimentary, about two thirds of length of tegmen. Fore femur with 5 small spines on interior ventral margin. Median femur with 5 small spines on both ventral margins. Hind femur with 8–9 small spines on both margins. Fore tibiae with 2–4 exterior on dorsal margins and 6 spines on both ventral margins. Median tibiae with 2 interior and 4 exterior spines on dorsal margins, and 6 spines on both ventral margins. Hind tibiae with 9 spines on both dorsal margins and 16 spines on both ventral margins. Subgenital plate slightly wider than long, approximately trapezoiform, with a sulcus along middle; caudal margin with an obtuse angular excision; lobes short, round. Ovipositor decurved, much longer than hind femur ( Figs. 1 F,H, 2H).

Male. Tegmen amplified, extending sixth abdominal tergum, with clear longitudinal and cross veins; dorsal plane broad in basal half, gradually narrowed distad; lateral plane broadened and deepened, deepest in apical one sixth, with wide rounded apical margin ( Figs. 1 E, 2A,E). 2/3 basal part of stridulatory file on underside of left tegmen with 31 distinct stridulatory teeth and 1/3 apical part with about 20 indistinct small teeth. These teeth are large-spaced arranged and gradually becoming larger centrad ( Fig. 3 A). Mirror on right tegmen large, much longer than wide; secondary mirror developed (Fig. 4A). Tenth abdominal tergum deeply divided into two lobes, with slightly pronounced apex, triangular apex of which overlapping (Fig. 5A). Cerci moderately long, robust, heavy of equal width to a robust internal tooth in middle, with slightly constricted and approximately wide apical half; apical tooth small, pointed, and apical margin inclined upwards (Fig. 5E). Subgenital plate possessing a distinct midline and lateral carinae; triangular notch shorter than styli (Fig. 5K). Titillator with one pair of arms (Fig. 5I).

Coloration ( Fig. 1 ). Generally green when alive. Compound eyes and maxillas yellow. Basal three segments of antennae blackish brown, and flagella reddish brown. Shoulder of lateral lobe of pronotum, and base of male tegmen brown. Dorsal plane of male tegmen with irregular brown cells and spots. Dorsal part of female tegmen dark brown with green veinlets. Tarsi whitish brown. Lateral margin of abdomen white with brown sparse spots. Female ovipositor brown.

Biology. The inverse second and last instars ( Figs. 1 A–D) are very similar to the adult ( Figs. 1 E–H) except for round pronotum and micropterous tegmen. The inverse second instar also differs from the adult by the very short ovipositor ( Figs. 1 B).

Notes. This new species resembles the type species Kansua hummeli in the shape of pronotum, leg spiniation, and shape of ovipositor, but differs by the veinal structure of tegmen, length and shape of subgenital plate.

Etymology. The name is named for the type locality of the new species.

Figures

FIGURE 1. Kansua diebua sp. n.. (A, B) inverse second instar; (C, D) last instar; (E-H) adult; (A, D, E, G) male; (B, C, G, H) female; (A – D, H) body, lateral view; (E, F) body, dorsal view; (G) body, frontal view. (photoed by Tao Zhang).

FIGURE 2. Body in whole view. (A, E, H) K. diebua sp. n. (holotype and paratype); (B, F, I) M. alashanicus; (C, G) A. longispeculi sp. n. (holotype); (D, J) A. liaoningensis sp. n.. (holotype); (A – G, J) male; (H – I) female; (A – D) body, lateral view; (E – J) body, dorsal view. (photoed by Guoqing Mai).

FIGURE 3. Male stridulatory file on underside of left tegmen. (A) K. diebua sp. n.; (B) M. alashanicus; (C) A. longispeculi sp. n.; (D) A. liaoningensis sp. n.. (photoed by Guoqing Mai).