Tetraconcha danflousi, 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 : 213-214

Tetraconcha danflousi sp. n. Figs 19-22, 75, 97

Material examined and depository.

-Ivory Coast, Taï Nat. Park, Res. Station 11.III.2017 (light), B. Massa (1♂ holotype) (BMPC).

Color.

-Head and pronotum yellow-green, abdomen yellow-brown, cerci brown, tegmina green with black spots on the anterior margin and along the diagonal veinlets. A translucent area at the base of tegmina. Like T. ruzzieri sp. n., one wide black spot is visible laterally on the metanotum, below the hind wing. This conspicuous character allows to exclude it as male of T. longipes , known only from the female sex, also collected in the Ivory Coast, along the coast next to the border with Ghana.

Description.

-Male. Head and antennae: Fastigium of vertex flat and sulcate, separated from the fastigium of frons. Eyes rounded, well-projecting. Antennae longer than body. Legs: Fore coxae armed with a small spine. Fore tibiae furrowed above, distinctly widening above tympanum, conchate on both sides. Fore femora armed on inner ventral side with 9 spines, fore tibiae with 7 spines + 1 spur on both ventral sides, 7 spines + 1 spur on outer dorsal side, mid femora armed with 8 spines on anterior ventral side, mid tibiae with 25-26 spines on both ventral sides + 1 spur on each side, and 9 spines + 1 spur on inner dorsal side. Hind femora unarmed, hind tibiae with many spines on both dorsal and ventral sides + 3 spurs on each side. Thorax: Pronotum narrowing anteriorly, flat above, anterior margin incurved, posterior margin rounded, humeral sinus well developed, lateral lobes rounded. Tegmina narrow with rounded apices. Wings longer than tegmina. Stridulatory area of left and right tegmina shown in Fig. 19, characterised by a protruding stridulatory file at the base of the left tegmina, separated by the rest of wing by a concavity (see arrow in Fig. 19) and a translucent area on both bases of tegmina (Fig. 19) that replaces the cubital areas. Stridulatory file curved, ca. 1.0 mm long, composed by ca. 100 very dense and evenly spaced teeth (Fig. 20). Abdomen: Subgenital plate with a “V” -shaped concavity, cerci stout and incurved (Figs 21-22).

Female. Unknown.

Measurements.

-Cf. Tables 1 and 2.

Diagnosis.

- T. danflousi sp. n. may be easily recognised by its translucent area at the base of tegmina, by protruding stridulatory area and a well-developed concavity between the stridulatory area and the rest of the left tegmen (Fig. 19), the high number of spines on mid tibiae.

Etymology.

-This species is dedicated to the French entomologist Samuel Danflous, who collected many interesting insects and spiders in the Taï Forest (Ivory Coast) and kindly helped the author during the nocturnal collecting of Orthoptera .

Distribution.

-Known only from Ivory Coast ( Taï Forest National Park).