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

Aancistroger primitivus Gorochov, 2005

Figs. 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) .

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 ). Abdominal tergites two and three each with two rows of stridulatory pegs.

Wings surpassing stretched hind tibiae ( Fig. 32C ). 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 ).

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 ). Ovipositor straight; tip subacute ( Fig. 34D ).

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.

Figures

FIGURE 32. Genus Aancistroger: A–B, A. elbenioides (Karny, 1926); C–D, A. primitivus Gorochov, 2005; E–F, A. vietus Gorochov, 2004; G–H, A. inarmatus sp. nov.—Habitus dorsal view (A, C, E, G); face (B, D, F, H). Scales 10 mm.

FIGURE 34. Genus Aancistroger: A–C, A. elbenioides (Karny, 1926); D–F, A. primitivus Gorochov, 2005; G, A. inarmatus sp. nov.; H, A. vietus Gorochov, 2004.—Habitus lateral view with ovipositor (A, D), apical area of female abdomen with seventh sternite and subgenital plate in ventral view (B, E), apical area of right hind tibia in dorsal view (C, F–H). Scales 10mm.