Bioacoustics of Adapantus (Neoadapantus) pragerorum

General. — Body of medium size, robust. Head. — Antennae about twice as long as body; antennal scapus with small apical spine. Fastigium of vertex triangular, reaching apex of antennal sockets. Frons flat; fastigium of vertex grooved dorsally. Thorax. — Humeral sinus of pronotum absent; lateral lobe wider than high; metazona flat; posterior edge of metazona straight; pronotum surface moderately granulate. Prosternum armed with two, widely spaced short spines. Legs. — Genicular lobes of front femur unarmed; genicular lobes of hind femur armed on both inner and outer sides; mid tibia unarmed dorsally. Wings. — Tegmen surpassing middle of abdomen but not reaching its apex (fig. 12C); vein Rs branching off usually in apical third of tegmen; veins Sc and R converging towards apex of tegmen; left stridulatory area coriaceous, without mirror (fig. 8E); right stridulatory area with small, circular mirror (fig. 8F). Stridulatory file weakly bent, flat, with 94–105 teeth (n=3), 1.28–1.41 mm long, 0.12–0.15 mm wide (fig. 3J). Hind wing slightly shorter than tegmen. Abdomen. — Cercus unarmed, bent in apical third; apex tapering (fig. 3B). Styli cylindrical, about 5 times as long as wide; subgenital plate with small, triangular apical incision (fig. 3E). Supraanal plate about as wide as long, broadly triangular. Female subgenital plate broadly triangular, with small apical incision. Ovipositor. — Apex with upper valvula minutely dentate, lower valvula smooth; pointed, dorsal edge of upper valvula straight; ovipositor slightly curved, about as long as hind femur (ratio hind femur/ovipositor 0.97–1.14) (fig. 3G). Coloration. — Coloration light brown to dark brown, uniform; face light brown, without darker markings; hind wing hyaline; occiput without markings; tegmen without markings (figs. 12B–C). Measurements ( 7 males , 8 females ). — body w/wings: male 25.5–31 (28.1±2.4), female 33–38 (36.3±1.6); body w/o wings: female 25–30 (26.9±1.5); pronotum: male 5–6 (5.2±.4), female 5.5–6 (5.9±.2); tegmen: male 10–17.5 (13.5±2.2), female 13–16 (13.8±1); hind femur: male 13.2–16.5 (14.5±1.1), female 15–17 (15.7±.7); ovipositor: female 14–16.5 (15.2±1) mm.