Aancistroger primitivus Gorochov, 2005

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 : 104-105

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https://doi.org/ 10.11646/zootaxa.4510.1.1

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Aancistroger primitivus Gorochov, 2005


Aancistroger primitivus Gorochov, 2005 View in CoL

Figs. 32 View FIGURE 32 C–D, 34D–F

Material examined. Cambodia: Pursat, Phnom Samkos , (12°13'2''N, 102°55'7''E), 15–18.x.2016, leg. J. Constant & J. Bresseel (I.G.: 33.345 GTI project)— 1 female (Brussels RBINS) GoogleMaps .

Description. Small to medium sized species. Head: Face narrow ovoid; forehead nearly smooth with very fine transverse riffles; fastigium verticis little wider than scapus; ocelli visible but little distinct; fastigium frontis not clearly separated from fastigium verticis; subocular furrows present but not strong ( Fig. 32D View FIGURE 32 ). Abdominal tergites two and three each with two rows of stridulatory pegs.

Wings surpassing stretched hind tibiae ( Fig. 32C View FIGURE 32 ). Tegmen: Radius with two branches, both forked near tip; media anterior free from base but leaning on R, single branched; cubitus anterior at base single branched, after division into two branches before end of basal quarter, the anterior branch makes a curvature and receives a short connection branch from MA, shortly after it divides into MP and CuA1, which are running parallel; CuA2 without further division; cubitus posterior undivided, free throughout; with 3–4 anal veins; the last incomplete and with common stem with third.

Legs: Fore coxa with a small 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 6 external and 4–7 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one preapical spine; with 3 apical spurs on both sides; dorso-internal apical spur substraight, about 1.5 times longer than dorso-external spur ( Fig. 34F View FIGURE 34 ).

Coloration. General color uniformly yellowish brown; head with irregular purplish flecks. Face uniformly yellowish or greyish brown. Tegmen semitransparent yellow, along fore and hind margins whitish; veins yellow; hind wing semitransparent white; veins yellow, cross-veins pale.

Male, see Gorochov (2005).

Female. Seventh abdominal sternite of normal shape, with a small pit in middle of subbasal area. Subgenital plate elongate and for the most part membranous; only at apex with a pair of roughly oval sclerites; apical margin concave in middle ( Fig. 34E View FIGURE 34 ). Ovipositor straight; tip subacute ( Fig. 34D View FIGURE 34 ).

Measurements (1 female).—body w/wings: 30; body w/o wings: 18; pronotum: 2.8; tegmen: 25.5; tegmen width: 7.5; hind femur: 8.7; ovipositor: 9.5 mm.

Discussion. The female subgenital plate is as described in Gorochov (2005) but the sclerotised apical lobes are more rounded and separated by a faint medial furrow.


Royal Belgian Institute of Natural Sciences

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