Tetraconcha perezi, Massa, Bruno, 2017

Massa, Bruno, 2017, Revision of the tropical African genus Tetraconcha (Orthoptera: Tettigoniidae: Phaneropterinae) with the description of ten new species, Journal of Orthoptera Research 26 (2), pp. 211-232 : 216

Tetraconcha perezi sp. n. Figs 28-31, 73, 96

Material examined and depository.

-Central African Republic, N’Doki, shore of Lake 1, 21.X.2010, 02°28' 51.0N 016°13' 04.5E (UV trap), P. Annoyer (1♂ holotype) (BMPC); Central African Republic, N’Doki National Park, 10.X.2008 (UV trap), P. Annoyer (1♂ paratype) (PACT).

Color.

-Head, antennae, pronotum and abdomen brown, face with a yellow spot, cerci yellow, tegmina with a black spot at their base, brown with yellow veinlets, bright yellow in the stridulatory area. Femora yellow-brown or green-brown (Figs 73, 96).

Description.

-Males. Head and antennae: Fastigium of vertex tuberculated, narrow, separated from fastigium of frons, little sulcate. Eyes rounded, well projecting. Antennae longer than body, exceeding hind femora, first segment well developed, comparatively to the other species of the genus. Legs: Fore coxae armed with a small spine. Fore tibiae furrowed dorsally, distinctly widening above tympanum, conchate on both sides. Fore femora armed on inner ventral side with 6-7 spines, fore tibiae with 6-7 spines + 1 spur on inner ventral side and 6 small spines on outer ventral side, 5 spines + 1 spur on outer dorsal side, mid femora armed with 6-7 spines on outer ventral margin, mid tibiae with 15-17 spines on outer and inner ventral sides + 1 spur on each side, and 3 spines + 1 spur on inner dorsal side, hind femora armed with 1-2 small spines on outer and inner ventral sides, hind tibiae with many spines on ventral and dorsal sides + 3 spurs on each side. Thorax: Pronotum narrowing anteriorly, flat above, anterior margin straight, posterior margin rounded, humeral sinus well developed, lobes of pronotum rounded. Tegmina narrow with rounded apices. Cubital area of the left tegmen narrow (Table 1). Wings longer than tegmina. Stridulatory area of left and right tegmina shown in Fig. 28; stridulatory file strongly curved and interrupted in the mid section by a bulge, followed by ca. 40 evenly spaced teeth, the distal part is composed of ca. another 40 widely spaced teeth (Fig. 29). Abdomen: Subgenital plate with a very small concavity, cerci stout and much incurved at the tip (Figs 30-31).

Female. Unknown.

Measurements.

-Cf. Tables 1 and 2.

Diagnosis.

- T. perezi sp. n. is very characteristic for the narrow fastigium of the vertex, the bright yellow stridulatory area, the subgenital plate with a very small concavity, cerci stout and strongly incurved, and the uniform brown color.

Etymology.

-After the entomologist Cyrille Perez, who participated to the expeditions to Dzangha-N’Doki National Park in 2010 and 2012.

Distribution.

-Known only from the Dzanga-N’Doki National Park (Central African Republic).