Materuana abyssinica, Massa, 2017

Massa, Bruno, 2017, New genera, species and records of Afrotropical Phaneropterinae (Orthoptera, Tettigoniidae) preserved at the Royal Belgian Institute of Natural Sciences, Bruxelles, Zootaxa 4358 (3), pp. 401-429 : 426

Materuana abyssinica n. sp.

Figs 18A–18E

Material examined and depository. Abyssinie ( Ethiopia), Maraco (= Marracò) (♂ holotype) ( RBINS). Other material examined. Materuana eriki Hemp, 2017 . Tanzania, East Usambara Mountains, Sigi Nature Trail II.2017, C. Hemp (1♂, 1♀) ( BMCP).

Among the unidentified specimens preserved at the Royal Belgian Institute of Natural Sciences, Bruxelles one old specimen collected in Ethiopia has been found; it is here being placed as a new species, tentatively belonging to the genus Materuana Hemp, 2017 .

Measurements. Body length: 31.9; length of pronotum: 8.1; height of pronotum: 9.0; length hind femur: 20.0; length of tegmina: 46.0; width of tegmina: 16.5.

Diagnosis. Main differences between this new species and the only previously known species, Materuana eriki Hemp, 2017 are: eyes not protruding, fore coxae and fore femora unarmed ( Hemp 2017).

Description. Male. Habitus and colour. Fully winged, medium sized, yellowish-green with red eyes, posterior margin of pronotum blackish, tegmina with blackish posterior margin. Eyes oval, not protruding. Fastigium of vertex laterally compressed, produced between scapi of antennae, above slightly sulcate, separated from fastigium of frons by a sulcus ( Figs 18A, 18B ). Antennae lacking in the specimen. Pronotum rounded, pronotal lobes higher than long, humeral sinus deep. Anterior margin of pronotum straight, posterior margin rounded. Fore coxae, fore femora and mid femora unarmed, hind femora with 4 small spines on inner and 2 on outer ventral margins. Fore tibiae with closed tympanum on inner side and open on outer one. Fore tibiae with 2 spines on ventral margins + 1 spur on each side, mid tibiae with 3 spines on ventral margins + 1 spur on each side, hind tibiae with 6 spines on outer ventral margin and 2 on inner ventral margin, 20 spines on both dorsal margins + 3 spurs on each side. Tegmina 2.8 times as long as wide, with rounded apex, opaque and shiny, with main veins slightly elevated above wing plane. Second pairs of wings as long as tegmina. Stridulatory file curved and long, consisting of ca. 70 small evenly spaced teeth ( Fig. 18C ). Last abdominal tergite undifferentiated, cerci thin, incurved with pointed tips. Subgenital plate basally broad, triangular, ending with a small concavity, styli short ( Figs 18D, 18E ).

Etymology. After the Ethiopia’s old Latin name, Abyssinia; abyssinica is adjective feminine.

Distribution. Known only from the type locality (Marracò), which is in the Oromia region, about 100 km South of Addis Abeba, between Zuai Lake and Tufa marshes (R. Poggi, pers. comm.).

Figures

FIGURE 18. Materuana abyssinica n. sp. holotype A) Lateral view. B) Face in frontal view. C) Stridulatory file of the left tegmen.D) Lateral view of the laSt abdominal SegmentS.E) Ventral view of the Subgenital plate.