Ingrischia, Naskrecki, Piotr & Rentz, David C. F., 2010

Naskrecki, Piotr & Rentz, David C. F., 2010, Studies in the orthopteran fauna of Melanesia: New katydids of the tribe Agraeciini from Papua New Guinea (Orthoptera: Tettigoniidae: Conocephalinae), Zootaxa 2664, pp. 1-35 : 5-9

Ingrischia gen. n.

Type species: Ingrischia macrocephala sp. n., here designated

Differential diagnosis. In the overall body shape, head size, wing venation, and male genitalic characters this new genus resembles Salomona , but can be distinguished by the lack of prosternal spines, a strongly developed fastigium of vertex, and a unique, nearly vertically bent ovipositor.

General. Body cylindrical, robust, of medium size for subfamily, mesopterous ( Fig. 3 A).

Head. Head disproportionately large; frons convex, oblique, weakly rugose in upper half, smooth in lower half; lateral carinae absent ( Fig. 3 C). Fastigium of frons well developed, separated from fastigium of vertex by small gap; fastigium of vertex almost needle-shaped, at base as wide as scapus, narrowing towards apex, 2 to nearly 3 times as long as scapus. Eyes comparatively small, their diameter less then 1/5 of frons length, circular, weakly protruding; median ocellus indiscernible; lateral ocelli strongly reduced. Antennal scapus unarmed; antennae about twice as long as body.

Thorax. Pronotum surface smooth; anterior margin of pronotum straight, flat; metazona slightly raised, posterior edge of metazona narrowly rounded; lateral lobe more than twice as long as high; marginal fold of pronotum very narrow, smooth. Thoracic auditory spiracle narrowly oval, completely hidden under pronotum, with short hair on inner margin. Sternum slightly concave; prosternum, mesosternum, and metasternum unarmed.

Legs. Legs short, robust. Front coxa armed with short spine; front femur laterally compressed, armed on both ventral margins; genicular lobes of front femur armed with spine on anterior (inner) side only. Front tibia unarmed dorsally, with short spines on each ventral margin; ventral spines on front tibia short, less than half as long as tibia diameter; tympanum bilaterally closed, with narrow, forward facing slits. Mid femur armed on anterior ventral margin only, genicular lobes of mid femur armed on posterior (inner) side only; mid tibia with spines on posterior and anterior ventral margin, spines on posterior margin much smaller. Hind femur robust, less than twice as long as mid femur, armed on anterior (outer) margin only; genicular lobes of hind femur armed with single spine on both sides; hind tibia armed on both dorsal and ventral margins, consecutive dorsal spines of hind tibia of similar size.

Wings. Tegmen not reaching to slightly surpassing apex of abdomen ( Fig. 3 A), tegminal venation normally developed; costal field clearly widened at base, anterior margin of tegmen rounded, tegmen distinctly narrowed towards apex ( Fig. 3 D). Veins Sc and R close together, parallel along their entire length; veins Rs, M, and Cu straight, running parallel to each other along entire length of tegmen; vein Rs branching off in apical fourth of tegmen, with 2 short apical branches. Right stridulatory area with large, fully developed mirror. Hind wing as long as tegmen.

Abdomen. Tenth tergite unmodified, with shallow, U-shaped incision on posterior margin ( Fig. 3 F); cercus thick, with short armature ( Fig. 3 G); epiproct unmodified, rounded. Phallus with well developed, strongly sclerotized titillators ( Fig. 3 H). Subgenital plate broadly trapezoidal, with small, rounded apical incision; styli minute, less than twice as long as thick. Female subgenital plate widely triangular, with small, triangular apical incision, posterior lobes acute ( Fig. 3 B).

Ovipositor. Ovipositor shorter than hind femur; strongly curved upwards, nearly vertical, apex with both valvulae smooth, blunt.

Etymology. This new genus is named in honor of Sigfrid Ingrisch for his contributions to the taxonomy of the Agraeciini .

Figures

FIGURE 3. Ingrischia megacephala n. gen. & sp.: A. paratype female; B. female subgenital plate; C. face; D. male tegmen; E. stridulatory file; F. male cerci, dorsal view; G. male right cercus, ventral view; H. titillators.