Bioacoustics of Tapiena munae

Diagnosis. The new species has a stout habitus and is characterised by the following characters: its face is red, from the fastigium to the frons, clypeus and labrum; the male tenth abdominal tergite forms a simple plate with two triangular lateral lobes (with rounded apices) and has its posterior margin between the lateral lobes truncated and roundly excised in the middle; the cercus is stout, bent at the middle (instead of arcuated) with its apex having three tooth-like spines. The new species is generally similar to T. paraincisa , Tapiena?incisa and Tapiena dimidia sp. nov. owing to its stout habitus and its fore femur and tympanum red and the simple tenth abdominal tergite; but it differs in all the characters described in the previous paragraph. The new species also differs from T. paraincisa by the stridulatory file more densely packed with teeth (at the middle with circa 82 teeth per mm instead of 52 teeth per mm).

Description. Habitus as shown in Figs 19 , 20 ; generally typical for genus and similar to species Tapiena?incisa and Tapiena dimidia sp. nov. Fastigium in dorsal view narrowly triangular, short, feebly surpassing anterior apex of eyes; furrowed longitudinally, lateral of furrow swollen; sulcus as wide as antennal scapus; with apex roundly truncated ( Fig. 21A ). Eye prominent, in dorsal view globular slightly protruding anteriorly ( Fig. 21A ); median and lateral ocelli prominent, round and large ( Fig. 21C ). Frons very densely and strongly punctuated ( Fig. 21C ); dorsum of head ( Fig. 21A ) and genae ( Fig. 21B ) densely punctuated. Pronotum circa 1.1 times longer than wide, densely punctuated ( Figs. 21A ). Dorsal disc with anterior margin straight; lateral margins straight and nearly parallel (feebly diverging posteriorly); posterior margin broadly rounded; hind lobe after middle, separated by indistinct and shallow suture; longitudinal furrow barely visible ( Fig. 21A ). Lateral keel present. Lateral lobe 1.2 times as tall as long; ventral margin fairly long and straight, anterior and posterior margins substraight ( Fig. 21B ). Thoracic auditory spiracle [= thoracic foramen] covered by pronotal lateral lobe ( Fig. 21B ). Prosternum unarmed. Mesosternum triangular with subacute apex; metasternum rectangular with anterior angle obtusely rounded, posterior angle 90° and rounded. Tegmen and hind wing fully developed. Hind wing with apex distinctively projecting beyond tegmen; exposed apex with dorsal and ventral margins straight and tapering to subacute apex ( Figs 20C, 20D ). Legs generally with very short and fine setae. Fore coxa with distinct, long, fairly straight (only slightly curved at base) spine. Fore tibia with external tympanum open, oval; internal tympanum slit covered by large conchate swelling ( Fig. 21D ). Hind femur with genicular lobe rounded, without any spine. Male. Tegmen with anterior margin straight and posterior margins convex, distinctly widened in the middle before tapering to narrowly-rounded apex; punctuated with many small transparent cells ( Figs 20A, 20B ). Tegminal venation: Radius sector (Rs) originating before mid-length, with fork longer than stem ( Figs 20A, 20B ). Stridulatory file of left tegmen crescent shaped, 2.9 mm in length ( Fig. 21E ); area around file not swollen; file at anal end with circa 16 stout teeth, thereafter, teeth very densely and evenly spaced elongated (more closely packed at the sides than in the middle); file at middle with circa 82 teeth per mm and teeth circa 0.11 mm long ( Fig. 21E ). Mirror on left tegmen made up of network of inter-crossed veins, margins unclear ( Fig. 21E ). Mirror on right tegmen longer than broad, rectangular but somewhat angularly bent at middle ( Fig. 21F ). Tenth abdominal tergite simple, with little or no modification, without tooth or long process apically; at posterior end with two triangular lateral lobes (with rounded apices) and having posterior margin between lateral lobes truncated and roundly excised at middle ( Figs 21G–I ). Epiproct tongue-shaped, concealed beneath tenth abdominal tergite ( Fig. 21I ). Cercus stout, bent at middle (instead of arcuated) with its apex having three tooth-like spines; two lateral spines larger than medial one ( Figs 21G–I ). Subgenital plate broad basally, gently tapering into shaft; with anterior margin concave; with posterior margin deeply excised at middle, laterally extended into two long and narrow lobes; styli slightly longer than apical excision of subgenital plate, tapering into obtuse apex ( Fig. 21J ). Female. Unknown.