Bioacoustics of Ibityraboia caraguata

Figures 2–11 Description. Holotype Male. Thorax . Mesobasisternum triangular-shaped, anteriorly concave ( Fig. 2E ). Lateral lobes of mesobasisternum anterolaterally convex, laterally slightly convex with small rounded projection and posteriorly straight, posterolaterally forming an angle of 90° ( Fig. 2E ). Metabasisternum diamond-shaped ( Fig. 2E ). Lateral lobes of mesobasisternum anterolaterally slightly convex, laterally and posteriorly straight, posterolaterally forming an angle of 70° ( Fig. 2E ). Wings . Left stridulatory file slightly curved; teeth basal and apical minor in relation to middle teeth ( Fig. 4A ). Total length of left stridulatory file 3 mm , greater vein width of 0.5 mm and a total of 106 teeth ( Fig. 4A ). Right stridulatory file curved; teeth basal and apical minor in relation to middle teeth ( Fig. 4B ). Total length file of 1.3 mm , widest vein of 0.2 mm and total of 51 teeth ( Figs. 4B ). Abdomen . Cercus apically forked, with the external projection curved, narrow and with acuminate apex ending in a slightly curved spine; internal projection slightly curved, with serrated inner face and acuminate apex ( Figs. 2I–J ). Space concave between the base of stylus ( Figs. 2I–J ). Internal male genitalia. Upper fold of ventral lobe large, elongated; margins slightly rounded and connected ( Figs. 5A–D ). Ejaculatory vesicle rounded ( Figs. 5A–D ). Titillator segmented as two large sclerites, anteriorly curved, opposing and posteriorly parallel straight ( Figs. 5A–D ). Apodemes sclerites large and narrow ( Fig. 5A–D ). Lower fold of ventral lobe small, bilobed, posteriorly elongated and exceeding the dorsal lobe ( Figs. 5A–B ). Dorsal lobe anteriorly with median small convex projection, laterally with two long and acuminated projections, posteriorly convex ( Figs. 5A–D ). Dorsal fold asymmetric, elongated and narrow ( Figs. 5C–D ). Coloration. Described based on photos of live specimens ( Fig. 6 ). Fastigium-vertex turquoise with two white round lateral spots. Scape anteriorly light green and posteriorly turquoise blue. Eyes and antennal sclerite light purple. Frontal region of head, clypeus and labrum yellowish orange. Jaws black. Body and legs light brown, with some dark brown areas. Leg spines with dark brown apex. Tegmina light brown, main veins dark brown and with numerous small black spots throughout the tegmina. Stridulatory region of tegmina dark brown. Abdomen, cerci and subgenital plate with whitish-yellow coloration. Abdominal segment with a dark brown lateral band. Space between the light pink segments, forming transverse bands on the abdomen. Female: Similar to male, except for the following features ( Fig. 7 ): Wings. Anal veins unmodified for sound production. Abdomen . Tergite X with two subtriangular projections similar to the male, but smaller and laterally spaced, in dorsal view ( Fig. 7E ). Cercus straight with acuminate and inward curved apex. Cercus with long white bristles ( Fig. 7E ). Subgenital plate anteriorly flattened and posteriorly projected and bifurcated around the ovipositor, forming two lateral acuminate projections with a size equivalent to the anterior region of the subgenital plate. Ovipositor straight; ovipositor base widened, moderately narrow and apically widening again; ventral valve not reaching apex; apex of ovipositor triangular. Coloration . Ovipositor with light brown base and other dark brown regions ( Fig. 8 ). Nymph. Nymphs are very similar to adults, with differences only in the coloration and in terminalia morphology ( Fig. 9 ). Eyes brown. Scape turquoise blue. Head, dorsal and lateral body dark brown, becoming lighter in the abdominal segments. Dorsal region of the body with a yellowish longitudinal stripe with pink lines. Ventral region of thorax, trochanter, base of femora and apex of tibiae light green. Apical region of the femoral and tibial base brownish green. Space between the abdominal segments light pink. Ventral region of abdomen yellowish-green.