Gorongosa, Naskrecki & Guta, 2019

Naskrecki, Piotr & Guta, Ricardo, 2019, Katydids (Orthoptera: Tettigoniidae) of Gorongosa National Park and Central Mozambique, Zootaxa 4682 (1), pp. 1-119 : 31-32

Gorongosa gen. n.

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Type species: Gorongosa carri sp. n., here designated

Differential diagnosis. This new genus is uniquely identified by the combination of the shape of the pronotum, tegmen with extremely reduced venation, simple cercus and unmodified 10 th tergite, the lack of sclerotized genitalia, and the shape of female ovipositor. In general appearance it resembles other short-winged Meconematinae , such as Amytta Karsch, 1888 and Naskreckia Gorochov, 2017 but can be distinguished by the lack of cercal modifications and the venation of the tegmen. From Orophilopsis subaptera Chopard, 1954 it differs in the distinctly more elongate pronotum. From short-winged members of the subtribe Acilacridina it differs in both the structure of the male genitalia, both internal and external, and the shape of the ovipositor, which lacks apical dentition typical of all members of that tribe.

General. Body cylindrical, small for Tettigoniidae ; male brachypterous, female apterous; legs elongate ( Figs. 12A, B, H ).

Head. Fastigium of frons not developed; fastigium of vertex as wide as 1/2 of antennal scapus, convex dorsally, slightly surpassing antennal sockets, triangular, blunt apically; eyes globular, moderately protruding, comparatively very small, their diameter approximately 1/3 of frons length; lateral and median ocelli absent; antennae more than twice as long as body; antennal scapus unarmed; frons oblique, convex, angular in lateral view and slightly pilose below vertex; lateral carinae absent; maxillary palp long, surpassing scapus and pedicel when extended forward, apex of 5 th palpal segment distinctly swollen ( Fig. 12E ).

Thorax. Pronotum nearly twice as long as wide when seen from above; pronotal sulcus poorly visible, intersect- ing pronotum into equal halves; anterior margin of pronotum flat, straight; pronotum surface smooth; lateral carinae of pronotum absent; posterior edge of metazona broadly rounded; metazona weakly convex laterally; lateral lobe about 3.5 times wider than high; humeral sinus of pronotum absent; thoracic auditory spiracle hidden under pronotum; prosternum unarmed.

Legs. Legs slender. Front coxa with minute, blunt process; front femur unarmed ventrally, round in cross section; genicular lobes of front femur unarmed; front tibia with 2–3 spines on anterior and 2 on posterior ventral margin, ventral spines on front tibia approximately as long as tibia diameter; front tibia unarmed dorsally, round in cross section; apex of front tibia with single ventral apical spine on anterior margin; tympanum bilaterally open, oval, about twice as long as wide. Mid coxa unarmed; mid femur unarmed ventrally; genicular lobes of mid femur unarmed; mid tibia with 4–5 spines on anterior and 2 on posterior ventral margin; apex of mid tibia with single ventral apical spine on anterior margin. Hind femur robust, about twice as long as mid femur, unarmed ventrally; genicular lobes of hind femur unarmed; hind tibia armed with about 25 small spines on both dorsal margins and 2–3 spines in the distal portion of ventral margin; apex of hind tibia with 1 pair of dorsal and 1 pairs of ventral spurs.

Wings. Tegmen reduced ( Fig. 12C ), completely hidden under pronotum, rounded, about as long as wide, its anterior margin rounded; tegminal venation extremely reduced, with only stridulatory vein (A1) and Sc remaining; hind wing reduced to minute, fleshy lobes. Female tegmina reduced to widely separated, minute lobes.

Abdomen. Tenth tergite unmodified, with shallow U-shaped incision on posterior margin; epiproct unmodified; paraprocts unmodified. Cercus straight and unmodified except for small apical tooth ( Fig. 12F ); straight when seen from side; apex sharply tapered, bent downwards. Phallus entirely membranous, without sclerotized elements. Subgenital plate narrowly trapezoidal, with shallowly triangular emargination; styli short, cylindrical, about twice as long as wide ( Fig. 12G ). Female subgenital plate narrowly triangular, with shallow triangular apical incision, posterior lobes acute ( Fig. 12J ).

Ovipositor. Ovipositor longer than half of hind femur, slightly curved; dorsal edge of upper valvula smooth; apex pointed, with both valvulae smooth ( Fig. 12H ).

Etymology. This new genus is named after Gorongosa National Park in Mozambique. The generic name is feminine.

Figures

FIGURE 12. Gorongosa carri gen et sp.n.: A. male (holotype), lateral view; B. ditto, dorsal view; C. ditto, right tegmen; D. ditto, stridulatory file; E. ditto, head and pronotum, lateral view; F. ditto, cerci; G. ditto, subgenital plate; H. female (paratype), lateral view; J. ditto, subgenital plate.