Gryllacris (Gryllacris) sok, 2018

Ingrisch, Sigfrid, 2018, New taxa and records of Gryllacrididae (Orthoptera, Stenopelmatoidea) from South East Asia and New Guinea with a key to the genera, Zootaxa 4510 (1), pp. 1-278 : 49

publication ID 10.11646/zootaxa.4510.1.1

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Gryllacris (Gryllacris) sok

sp. nov.

Gryllacris (Gryllacris) sok View in CoL sp. nov.

Figs. 10J View FIGURE 10 , 12F View FIGURE 12 , 16J View FIGURE 16 , 17G View FIGURE 17

Material examined. Holotype (female): Thailand: Surat Thani, Khao Sok , elev. 150 m (8°55'N, 98°30'E), 26.i.1997, leg. S. Ingrisch— 1 female (Bonn ZFMK). GoogleMaps

Diagnosis. A specimen of this species was already reported as “ G.? peracca “ by Gorochov 2007 with one female from the same locality. The specimen from Khao Sok differs from G. peracca by narrower tegmina, the shape of the female subgenital plate being without apical incision, and by a shorter ovipositor. The female subgenital plate is similar to that of G. signifera but the apical margin is not bilobate but only little concave and the median styliform process longer and extended closer to tip. G. sok sp. nov. also differs by larger wings with markedly longer tegmen and hind wings, the latter are also more extended, with greater surface, by the color pattern on pronotum that is less pronounced (light instead of black), and by coloration of the face: brown with light marks and white ocelli instead of more or less uniformly light color.

Description. Medium sized species ( Fig. 10J View FIGURE 10 ). Head: Face oval; forehead nearly smooth; fastigium verticis wider than scapus; ocelli distinct, of light color; subocular furrow weak ( Fig. 12F View FIGURE 12 ).

Wings surpassing hind knees and almost reaching middle of stretched hind tibia ( Fig. 10J View FIGURE 10 ). Tegmen: Radius releases RS behind basal third, both veins forked near tip. Media anterior fused in basal area with radius; media posterior absent; cubitus anterior divides behind basal third into CuA1 and CuA2; cubitus posterior singlebranched and free throughout; with 4 anal veins.

Legs: Fore coxa with a long spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large ventral spines and one pair of smaller ventral spurs; hind femur with 10 external and 6 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color light brown; vertex and pronotum with light and medium brown pattern and with dark strokes, rim of pronotum dark brown. Legs of general color. Face medium dark brown with yellowish ocelli, below ventro-posterior margin of eyes with light bands; labrum dark brown. Tegmen semi-transparent yellow with yellowish brown veins and pale veinlets, darker towards base; hind wing semi-transparent white or ochre with brownish main veins and blackish brown cross-veins.

Male unknown.

Female. Seventh abdominal sternite unmodified. Subgenital plate about flat pear-shaped; in basal two thirds very wide with convex and strongly converging lateral margins, in apical third with subparallel but slightly convex lateral margins, apex faintly bilobate, with a faint medial furrow; all margins with distinct rim; greatest part of basal surface membranous ( Fig. 16J View FIGURE 16 ). Ovipositor of medium length; curved, most strongly in subbasal area; margins faintly approaching; dorsal margin with a slight expansion before tip ( Fig. 17G View FIGURE 17 ).

Measurements (1 female).—body w/wings: 40; body w/o wings: 25; pronotum: 6; tegmen: 28; tegmen width: 9; hind femur: 18; antenna: 150; ovipositor: 15 mm.


Zoologisches Forschungsmuseum Alexander Koenig













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