Psyrana heptagona, Liu, Chun-Xiang, 2011

Liu, Chun-Xiang, 2011, Brief Summary of Holochlorini (Orthoptera: Tettigoniidae: Phaneropterinae), with Description of Seven New Species from China, Zootaxa 2931, pp. 35-52 : 46

Psyrana heptagona sp. nov.

(Plate 5 g –h)

Holotype: female, KIBVNE, 1931. IX.23, Coll. K. EKI ( IZAS).

Description. Size median. Fastigium verticis dorsally sulcate, with obtuse apex; deflexed towards frons, narrower than first segment of antennae, not contacting fastigium frons. Antennae thin, long, flexible. Compound eyes oval, produced. Pronotal disc with prozona smooth and metazona flat, with longitudinal median carina complete and without lateral carina; anterior margin approximately straight, posterior margin slightly rounded and approximately truncated; median transverse furrow “V”-like; lateral lobe of pronotum about as long as high, with anterior margin slightly concave, ventral margin obtuse, and posterior margin straight; humeral sinus distinct. Anterior coxae with a distinct spine. Anterior femur with 6 interior ventral spines; median femur with 4 exterior ventral spines; posterior femur with 7 exterior and 6 interior ventral spines. Anterior tibiae dorsally sulcate and with 3 spines as well as 1 spine above tympana; median femur with 10 exterior and 6 interior dorsal spines; posterior tibiae with 30 exterior and 29 interior dorsal spines. Each genicular lobe with 1 large median spine and 1 small lower one.

Tegmen extending beyond apex of posterior femur, hind wing longer than tegmen. Costa vein indistinct, Sc and R running closely until middle of tegmen. Rs vein branching slightly before middle of tegmen, bifurcate at right tegmen (not bifurcate at left tegmen); R stem also with more 2 lateral branches to posterior margin of tegmen.

Epiproct plate triangular, wider than long. Cerci conical, robustest at base and then gradually tapering, slightly incurve. Ovipositor rather narrow, not twice longer than length of pronotum; apical 1/3 part of lateral surface denticulate; apical 1/2 part of dorsal margin and apical 1/4 part of ventral margin crenulated, and apex of dorsal margin sharp (Plate 5h). Subgenital plate approximately heptagonal, with lateral margin spreading outwards in basal part, and then running inwards towards apex; apical margin obtuse (Plate 5g).

Color. Yellow green (maybe green at alive). Compound eyes brown. Antenna yellow green. Spines of posterior leg with tip brown. Tegmen green, Costa red brown, base of Sc vein with black dots. Apical 1/4 part of ovipositor brown.

Male unknown.

Measurements of female (mm). length of body 27.0; length of pronotum 5.5; length of tegmen 38.5; largest width of tegmen 9.5; length of hind wing 42.0; length of posterior femur 29.0; length of ovipositor 11.0.

Etymology. The name refers to the shape of the female subgenital plate of the new species.

Discussion. The new species differs from other congeners by the shape of the female subgenital plate and ovipositior.

Distribution. Vietnam.