Bioacoustics of Atlanticus (Atlanticus) wudangensis

( Fig. 2T ; 3T ; 4Q ; 5J ; 8D, H ; 9T ; 11P ; Table 1) Holotype . Male [No. IOZ(E)361606], China : Hubei Prov. , Wudang , Caotiangong , 1984.VIII.15 , Collector unknown. Paratype . 1 female [No. IOZ(E)361605], China : Hubei Prov. , Wudang , 1988.VIII.16 , Collector unknown . Diagnosis. Medium-sized compared to others in the Sinensis Group. Lateral lobes of pronotum slightly longer than high. Hind femur three times the length of pronotum ( Fig. 8D, H ; 9T ). Male tegmen extending to caudal margin of the fourth abdominal tergum at rest. Stridulatory file on underside of male left tegmen with 102 distinct teeth which gradually becoming larger centrad ( Fig. 5J ). Mirror of male right tegmen not covered by pronotum ( Fig. 2T ). Male tenth abdominal tergum with a deep elliptical notch from basal quarter ( Fig. 4Q ). Male cercus narrow, moderately long, heavy of equal width to a comparatively small internal uncinate tooth in central one third portion, then abruptly narrowed, and gently incurved in apical one-third portion with apex obtuse ( Fig. 3T ). Ovipositor moderately robust ( 1.5 mm wide in middle), with apical half moderately recurved ( Fig. 8H ). Description. Holotype . Male. Disc of prozona slightly convex, and metazona nearly flat behind. Pronotum narrowest in proximal one-third, and then gradually ampliate caudad. Lateral lobes of pronotum slightly longer than deep, deepest before middle; anterior margin very slightly concave, posterior margin oblique with a very indistinct central concavity, ventral margin slanting caudad to posterior angle. Tegmen with a reticulation of poorly defined veins; posterior portion convex ( Fig. 8D ; 9T ). Fore femur with 1-2 interior ventral spines. Middle femur with 1-2 external ventral spines in apical one-third. Apical half of hind femur with 3 exterior and 5 interior spines on ventral margins. Fore tibia with 3 dorsal spines on exterior margin and 6 ventral spines on both margins. Middle tibia with 6 ventral spines on both margins and 3 dorsal interior spines. Hind tibia with 22 exterior and 21 interior spines on dorsal margins. Male tenth abdominal tergum with a deep elliptic cleft from basal quarter ( Fig. 4Q ). Male subgenital plate broader than long; apical margin with a shallow “V”-shaped notch between styli, notch as half length of stylus ( Fig. 11P ). Female (8H). Size more robust than male. Tegmen not produced dorsally. Ovipositor twice longer than pronotum, with moderately recurved apical half (about 30º angle) ( Fig. 8H ). Proximal one-third part of ovipositor narrowed from base, remainder of equal width, with upper margin slightly obliquely truncated at apex ( Fig. 8H ). Subgenital plate distinctly transverse, with a narrow triangular notch in apical quarter and forming two obtuse triangular lobes. Coloration. Generally reddish brown. The following parts shining blackish brown: outer surface of two basal antennal joints; fastigium frontis; lateral surfaces of fastigium verticis; postocular fascia; upper portion of pleurae; central one-third portion separating upper from lower parts of hind femora; lateral lobes of pronotum except a comparatively narrow brown fascia along the lower margin extending a little above humeral notch; a little proximal portion of anterior surface of hind femora; a wide fascia in proximal three fourths area between radial vein and costal margin of tegmen. Numerous spots on fore and middle legs dark brown. Tegmen pale brown; stridulatory area on left tegmen grayish, with dark brown vein; several dots positioned in areas between medial and radial veins. Ventral spines of hind femur black. Abdominal tergites dark. Additionally, in the female, the coloration is generally lighter than the male with a narrow dark brown line separated upper from lower parts of hind femur; posterior part of each abdominal tergum rust-like. Notes. This new species is similar to A. hunanensis Du & Shi in the length of male tegmen, but distinctly differs by size and length of pronotum. It differs from other Chinese congeners in the subgenus Atlanticus (including A. sinensis Uvarov , A. grahami Tinkham , A. robustus Bei-Bienko , A. huangshanensis Shi & Zheng , and A. kulingensis Tinkham ) by size, length of pronotum, shape of male tegmen and of female ovipositor. Etymology. The new species is named for the type locality. Distribution. China ( Hubei ).