Bioacoustics of Astyloplatum

Description. Medium size (body length 18–20 mm ) and robust ( Fig. 1 ). Coloration. The only known species of yellowish body. Head. Space between antennal sockets 1.5 times wider than the antennal scape ( Figs. 2A, B ); ocelli rounded, small, and diffuse ( Fig.2A ); maxillary palps elongated, third and fourth segment similar in size, fifth segment a little longer than the previous ones and slightly dilated at the apex; labial palpi robust, the last segment noticeably dilated and with rounded apex ( Fig. 2C ). Thorax. Pronotum narrow and smooth, with quadrangular disc and lateral lobes ( Fig. 2B ); humeral notch not developed; auditory spiracle below the lower margin of the lateral lobe of the pronotum armed with a triangular fold, attached on the mesothorax ( Fig. 2C ). Sternum lobes are rounded and narrow, without prolongations; mesosternum quadrangular with the anterior margin 1.5 wider than the posterior one; metasternum triangular and narrow. Legs. Fore coxa armed with a spine dorsally. Fore and mid femora unarmed; fore and middle tibiae with four long spines on each ventral margin and one spine on each side of the ventral-apex ( Figs. 2D , 4E ); hind femur robust, ventrally armed; hind tibia armed with spines dorsally only, apex with three spurs on each side, being the upper and mid one the longer and similar in length ( Fig. 2E ). Wings. Lanceolate and not exceeding the apex of the abdomen and hind femur, reaching the ninth tergite, MP vein absent; MA vein not forked. ( Figs. 1B , 2F ). Abdomen. Stridulatory apparatus present on sides of first and second tergites. Ninth tergite unmodified ( Fig. 2G ); tenth tergite with two plates denticulated on the posterior edge ( Fig. 2H ), ventrally on the last tergite with two triangular plates denticulated ( Fig. 2I ). Cerci almost cylindrical, shorth, and without modification ( Figs. 2G, H ). Paraprocts unmodified. Subgenital plate subtriangular, without stylli but with lateral prolongations and the posterior edge produced between them ( Fig. 2J ). Phallic complex. Predominantly membranous ( Fig. 3 ), without sclerotized areas, but with microstructures on the dl , as a ti ( Fig. 3A ); ejv conspicuous and linguiform ( Fig. 3B ). Female. Tenth tergite without modification ( Figs. 4A ). Cerci cylindrical and thin; ovipositor almost as long as the hind femur, slightly curving upward, smooth edges, rounded apex ( Figs. 4H ); subgenital plate subrectangular without modifications, and with posterior edge rounded ( Figs. 4G ).