Capnogryllacris (Capnogryllacris) thaica Gorochov et Dawwrueng

Gorochov, Andrej V., Dawwrueng, Pattarawich & Artchawakom, Taksin, 2015, Study of Gryllacridinae (Orthoptera: Stenopelmatidae) from Thailand and adjacent countries: the genera Ultragryllacris gen. nov. and Capnogryllacris, Zootaxa 4021 (4), pp. 565-577 : 568-569

Capnogryllacris (Capnogryllacris) thaica Gorochov et Dawwrueng , sp. nov.

( Figs 18 , 21–25)

Material studied. Holotype—male; Thailand, Uthai Thani Prov., Thap Sela Settlement, 14.VIII.2009, V.G. Bezborodov ( ZIN).

Description. Male (holotype). Colouration of body yellowish with following marks ( Fig. 18 ): head light brown with slightly lighter dorsal part of epicranium, whitish ocelli, reddish tinge on clypeus, reddish brown labrum, and yellowish basal parts of maxillae and labium as well as most part of their palpi (but with apical part of palpi almost reddish brown; Figs 21, 22); pronotum with somewhat darker (light brown) borders, stripe along anterior edge of disc, and wider area along posterior edge (from posterior parts of lateral lobes to posterior part of disc; Figs 22, 23); apical part of fore and middle femora, distal part of hind femur, all tibiae and all tarsi light brown with reddish tinge (but hind femur with light brown longitudinal line on outer surface near ventral edge and with partly brown ventral denticles, most part of movable ventral spines of fore and middle tibiae dark brown, and spines of hind tibiae with brown distal part); tegmina with yellowish base, large dark brown area in proximal half, distinctly smaller semitransparent yellow spot crossed by light brown venation in costal part of above-mentioned area, and other parts of tegmen semitransparent and with yellowish tinge (these parts with yellow to light brown venation; Fig. 18 ); hind wings with transparent membranes, yellowish grey to yellow longitudinal veins, and greyish brown crossveins ( Fig. 18 ); 2nd–7th abdominal tergites with light brown stripe along posterior edge; distal part of hooks of 9th abdominal tergite dark brown (Figs 24, 25). Structure of body typical of Capnogryllacris s. str. but with following characteristic features: median ocellus moderately large and round, located between lower halves of antennal cavities; lateral ocelli distinctly smaller but also almost round (Fig. 21); fore and middle tibiae with 5 pairs of rather long spines (excepting apical ones which clearly shorter); hind legs with 9–11 outer and 7–9 inner denticles (short unarticulated spines) on ventral keels of femur and 7–8 similar but somewhat longer dorsal spines on each edge of tibia (apical part of this tibia with 3 pairs of articulated spurs only, i.e. ventral surface of hind tibia without spines or denticles); wings insignificantly shortened, reaching cercal apices and slightly extending behind apices of hind femora ( Fig. 18 ); hooks of 9th abdominal tergite not long, straight, with inflated proximal and spine-like distal halves (Figs 24, 25); paraprocts and epiproct unspecialized; genital plate with moderately long styles and rather deep and angular notch between them (Fig. 24); genitalia completely membranous.

Female unknown.

Measurements (in mm). Length of body 23; body with wings 24; pronotum 6.7; tegmen 26; hind femur 19.5.

Comparison. The new species is similar to C. khmerica Gorochov, 2003 in the body size and tegminal colouration: presence of a rather large dark area in the proximal tegminal half and of a characteristic yellow or yellowish spot in this area (see Figs 17, 18 ); but C. thaica is distinguished from C. khmerica by lighter and less contrastingly coloured head as well as pronotum and legs, and by clearly shorter wings and more strongly inflated proximal halves of the hooks on the 9th abdominal tergite of male (for comparison see Figs 25 and 39). From all the other congeners, the new species differs in its characteristic colouration, wing size and structure of the male copulatory device.

Etymology. This species is named after “ Thai people”, the main ethnic group of Thailand.

Figures

FIGURES 16 – 20. Body of male from above (16 – 18, left wings spread): 16, Ultragryllacris pulchra gen. et sp. nov.; 17, Capnogryllacris khmerica Gor.; 18, C. thaica sp. nov.; 19, 20, C. sakaerat sp. nov. (19, holotype; 20, paratype).