Terraplistes ingrischi Tan, Dawwrueng & Artchawakom, new species

(Fig. 8)

http://lsid.speciesfile.org/urn:lsid: Orthoptera.speciesfile.org:TaxonName:471939

Material examined. Holotype (male): Thailand, Nakhon Ratchasima, Sakaerat Environmental Research Station, near light trap, dry evergreen forest, N14.50756, E101.92822, 408.9±5.0 m, 24 June 2014, 2231 hours, coll. M. K. Tan, H. Yeo & S. T. Toh (SERS.14.48) (ZRC).

Paratypes: same locality as holotype, 1 male (SERS.14.18), main road, dry evergreen forest, N14.50755, E101.92823, 418.0±5.0 m, on leaf litter, 23 June 2014, 2321 hours, coll. coll. M. K. Tan, H. Yeo & S. T. Toh (ZRC); 3 males (THNHM-I-2015-00157 – THNHM-I-2015-00159), 1 female (THNHM-I-2015-00160), beside main road, dry evergreen, under leaf litter, 400-450m a.s.l., 29 March 2015, coll. P. Dawwrueng, N. Makbun, P. Pawangkhanant & K. Yimyoo.

Diagnosis. This species differs from all known species of Terraplistes by: maxillary palps with apical, subapical and third segments completely black; first (basal) and second segments mostly black but distally white; male paraproct process with dorso-apical angle obtuse and ventro-apical angle more acute, very setose along apical margin.

Description (n = 5). Habitus as typical for the genus (Fig. 8 A). Frontal rostrum about 3.3 times broader than scapus. Maxillary palps with apical (fifth) segment elongated, moderately widened and apex strongly oblique; fourth segment with apical part slightly widened, third segment cylindrical; apical segment longer than third and fourth segments (Fig. 8 B). Pronotum in male about 1.3 times longer than wide; with anterior dorsal margin concave, lateral margins slightly narrowed anteriorly, and posterior dorsal margin broadly rounded, covering tegmen completely. Hind femur about 1.6 times longer than hind tibia; hind tibia 1.5 times longer than hind metatarsus.

Male. Last abdominal tergite and epiproct partly fused to a supra-anal plate; triangular, transverse at base and obtuse at apex; with a row of setae along margin (Fig. 8 D). Cercus stout and fairly long. Subgenital plate broadly rounded. Paraproct process with club-like projection, separated from base by wide but shallow gap; projection fairly large, with dorso-apical angle obtuse and ventro-apical angle more acute, very setose along apical margin (Fig. 8 E). Sclerotized structure in phallic complex absent.

Female. Supra-anal plate setose, apical margin rounded. Subgenital plate triangular, about as long as wide, apical margin concave (Fig. 8 F). Ovipositor short, with apical valves narrow; dorsal valve slightly longer than ventral valve; dorsal valve and ventral valve with apex acute, (Fig. 8 G).

Colouration. Generally black. Head black, eye brown; scapus and basal antennal segments black, antenna pale with black rings. Maxillary palps with apical, subapical and third segments completely black; first (basal) and second segments mostly black but distally white (Fig. 8 B). Pronotum black (Fig. 8 C). Mesosternum and metasternum black. Wing white (Fig. 8 C). Legs, including tarsus, generally black. Hind femur with inner surface black; outer surface black with some brown scales. Hind tibia black. Abdominal tergites mostly black with scales along distal margins of tergites brown; abdominal sternites and subgenital plate black in male and dark brown in female. Cercus brown, more pale basally and darker apically (Fig. 8 D). Ovipositor brown (Fig. 8 G).

Measurements. See Table 4.

Etymology. This species is named after Sigfrid Ingrisch, who has made immense contribution to the taxonomy of Mogoplistinae from Southeast Asia, including the erection of the genus Terraplistes.