Atlanticus (Atlanticus) kangxiani Liu 2013, sp. n.

(Fig. 1P; 2P; 3P; 4O; 8A,E,G; 9P; 11Q; Table 1)

Holotype. Male [IOZ(E)361921], China: Gansu Prov.: Kangxian, Qinghe Forestry spot, 1400m, 1998.VII.14, Coll. Zhang Xuezhong.

Paratypes. China: Gansu Prov.: Kangxian, Qinghe Forestry spot, 7 males, 2 females, 1400m, 1998.VII.14, Coll. Zhang Xuezhong, Chen Jun, Yang Xingke; 2 males, 1 female, 1450-1650m, 1998.VII.15, Coll. Yao Jian, Wang Shuyong.

Diagnosis. Large-sized compared to the congeners in Kangxiani Group (Fig. 8A, E; 9P). Proximal three quarters of stridulatory file on underside of male left tegmen with 78 distinct stridulatory teeth which gradually becoming larger centrad (Fig. 1P). Mirror of male right tegmen not covered by pronotum; proximal one ninth part of mirror possessing a distinct strongly sclerotized transverse vein (Fig. 2P). Male tenth abdominal tergum with a deep narrow conversely triangular central cleft from basal quarter; the cleft with basal margin convex caudad (Fig. 4O). Male cerci moderately long, heavy, gradually acuminated to an internal uncinate tooth in distad of centre, then abruptly narrowed, and gently incurved in apical one third part with an obtuse pointed apex (Fig. 3P). Apical margin of male subgenital plate with a shallow “V”-shaped notch between moderately robust styli, notch oneeighth of length of stylus.

Description. Holotype. Male. Disc of prozona slightly convex, and metazona approximately flat. Pronotum narrowest in basal third, and then gradually ampliate caudad. Lateral lobes of pronotum slightly longer than high, deepest at middle; anterior margin very slightly concave, posterior margin oblique with a very indistinct central concavity, ventral margin aslant caudad to posterior angle. Tegmen extending to caudal margin of the fifth abdominal tergum at rest, with a reticulation of poorly defined veins; posterior portion convex (Fig. 8A; 9P). Middle femur with 2 external ventral spines in apical half. Hind femur with 5–6 exterior and 5–7 interior spines on ventral margins. Fore tibiae with 3 dorsal spines on exterior margin and 6 ventral spines on both margins. Middle tibiae with 6 ventral spines on both margins, 2 exterior and 4 interior spines on dorsal margins. Hind tibiae with 20 exterior and 13 interior spines on dorsal margins.

Female (Fig. 8E). Size more robust than male. Tegmen slightly produced dorsally. Ovipositor twice longer than pronotum, with moderately recurved apical half (about 30º angle) (Fig. 8E). Proximal one-third part of ovipositor narrowed from base, remainder of equal width, with upper margin slightly obliquely truncated at apex (Fig. 8E). Subgenital plate distinctly transverse, with a narrow triangular notch in apical quarter and forming two obtuse triangular lobes.

Coloration. Generally brown. The following parts shining black: the outer surface of two basal antennal joints; lateral surfaces of fastigium verticis; postocular fascia; two middle blocks on caudal margin of occiput; lateral lobes of pronotum except a comparatively narrow brown fascia along the lower margin extending a little above humeral notch; upper portion of pleurae; numerous spots on fore and middle legs; a robust line with indefinite striation separated the upper half from the lower half of hind femur; a wide fascia in five sixths portion of submarginal field of male tegmen. Blackish punctures in apical fifth part in disc of pronotum and blackish veins of the stridulatory area on male left tegmen. Ventral spines of hind femur black.

Notes. The species possesses the longest male tegmen among all known species in the subgenus Atlanticus. The species also differs from the congeners in Sinensis Group in that the male cercus bears the inner tooth distad of the centre.

Etymology. The new species is named for its type locality.

Distribution. China (Gansu).