Bioacoustics of Wuyjugu pizai

Description. Head. Tegument smooth; fastigium of vertex contiguous with fastigium of frons, not dentated bellow, triangular, conical, as wide as the scapus, projected obliquely ( Fig. 2A; B ); scapus with lobe projected inward ( Fig. 2A ); genae without lateral carinae ( Fig. 2A ); mandibles as long as the distance between the antennal orbit and the clypeal suture ( Fig. 2A ); medial ocellus conspicuous ( Fig. 2A ). Thorax. Pronotal disk with rounded keels only on the posterior zone, with a transversal sulcus, arched forward, weakly marking the limits of anterior and mid zones ( Fig. 2B ). Anterior margin of pronotal disk slightly concave medially; posterior margin truncate ( Fig. 2B ). Lateral lobes of pronotum longer than deep, with ventro-cephalic margin rounded; anterior angle rounded and widely obtuse; ventral margin concave; posterior angle straight, with a rounded border; ventro-caudal margin rounded; humeral sinus weakly impressed ( Fig. 1A; C ); prosternum smooth; meso- and metasternum wider than long; meso- and metabasisternal lobes ( msl and mtl , respectively) reduced, not produced hindward, mesobasisternal lobe with a very small protuberance on the posterior angle ( Fig. 2C ). Wings. Wings very long, greatly surpassing the apex of the abdomen ( Fig. 1 A–D); tegmina straight, with anterior and posterior margins almost parallel (anterior margin slightly arched proximally) ( Fig. 2D ); stridulatory apparatus with the left file bearing 95 teeth, maximum and minimum distances between teeth 0.02 and 0.04 mm , respectively ( Fig. 2G ); left file damaged; vein CuPa of the apparatus absent in both wings, forming a large cell compound by h1 and the neck (cell h1+neck ), which is longitudinally marked by a fold line ( Fig 2 E–F); frame of left tegmina almost parallel to the posterior branch of CuPa ( CuPaβ ) ( Fig. 2F ). Abdomen. Male tenth tergite without conspicuous lobes or projections, only two broadly swollen areas just above the cercus ( Fig 3A ); male cercus with the apex obliquely truncated and slightly bilobated, the mid-dorsal portion with a conspicuous oblique inward spine and ventral portion with a subapical inward finger-like projection ( Fig. 3 A–B); subgenital plate triangular, apically incised, with cylindrical styli ( Fig. 3C ); phallic complex completely membranous and compressed dorso-ventrally, with tiny ejaculatory vesicles ( ejv ), dorsal lobe ( dl ) smaller than ventral lobes ( vl ) ( Fig. 3 F–I); ovipositor very long (almost as long as the wings), very thin, acuminated and completely straight ( Fig. 1C ; 2H ); female subgenital plate triangular in ventral view ( Fig. 3D ); in lateral view, the lateral expansions of the plate fold dorsally in a straight angle forming a keel ( Fig. 3E ). Probably the female specimen was previously immersed in an alcoholic solution, or it had recently molted when killed and preserved because the scleritis of the abdomen were strongly deformed. Even after rehydrated, the abdominal scleritis (including the subgenital plate) remain unchanged, so it is difficult to ensure if the original form is the same as seen in Fig. 3 D–E. Body size. Male. Total size : 45.2 mm ; pronotum : 6.4 mm ; width of pronotum : 5.5 mm ; tegmina : 35.2; hind femur : 22.5 mm . Female. Total size : 57 mm ; pronotum : 8.5 mm ; width of pronotum : 7 mm ; tegminia : 45.6 mm ; hind femur : 28 mm ; ovipositor : 43.8 mm .