Pseudonicsara (P.) dilatata, Ingrisch, 2009

Ingrisch, Sigfrid, 2009, Revision of the genus Pseudonicsara Karny, 1912 (Orthoptera: Tettigoniidae: Conocephalinae: Agraeciini) 2185, Zootaxa 2185, pp. 1-122 : 28

Pseudonicsara (P.) dilatata sp. n.

Figs. 74, 111, 155, 194, 245, 280, 328, 338, 375, 413, map 3.

Holotype (male): Papua New Guinea, East Sepik: D. N. Guinea, Kaiserin Augustafl. Exp., Gratelager [4° 23' S, 142° 58' E], 1050 m, 18–20.VIII.1912, Bürgers, depository: Museum für Naturkunde der Humboldt- Universität , Berlin, Germany ( ZMB).

Diagnosis. P. dilatata belongs to the species with the male cercus having a single baso-internal and a single apico-internal process. It is characterised by the baso-internal process being digitate, pointing mediad, and sitting on a long undulate lamella running to apex of cercus; the apico-internal process is entire, curved ventrad and little sinuate with obtuse apex ( Fig. 194). Unique within the genus are the long and narrow apical parts of the titillators with nearly parallel margins and conical apex ( Fig. 375). Differences to other species are outlined in the key.

Description. Fastigium verticis in front of eyes 1.0 mm, from base 1.4 mm; dorsal eye length 1.6 mm; greatest diameter of eye 1.7 mm; index fastigium verticis from base: eye length 0.9. Face with numerous very shallowly impressed dots, but not really rugose. Tegmen little surpassing hind knees, rather narrow, costal field constricted in apical third. Femora with the following number of spines on ventral margins: fore femur 8 external, 6–7 internal; mid femur 6 external, 3 internal near base; hind femur 33 external, 2 minute internal in basal area.

Male. Stridulatory file sinuate, 2.5 mm long; teeth at apex very dense and indistinct; with 94 teeth or 37.5 teeth per mm, in middle of file with 27.6 teeth per mm ( Fig. 74). Mirror narrowing posteriorly; angles rounded; fore and hind margins straight; 1.7 mm long, 1.5 mm wide; index length:width 1.1. Tenth abdominal tergite globular; apical margin broad-roundly excised in middle, short transverse-triangularly projecting at both sides of excision ( Fig. 111). Epiproct narrow-triangular, strongly compressed, with lateral margins raised and embracing a deep furrow ( Fig. 155). Projection of paraproct dorso-ventrally compressed, transverse, obtuse. Cerci conical, moderately curved; interno-dorsal margin forming a large triangular lamella with irregular margin, with an obtuse projection at proximal and a longer, compressed ventral projection at distal end just before apex of cercus ( Figs. 194, 245). Subgenital plate with angles at both sides of apical excision projecting behind bases of styli; styli conical, inserting on ventral surface before apex of subgenital plate ( Fig. 280).

Titillators with apical parts rather narrow, elongate; interno-apical surface brown, with clinging hairs, margin granulose, hyaline, a little irregular; apex rounded ( Figs. 328, 338, 375, 413). Apico-lateral sclerites large, ovoid, curved, weakly sclerotised, infumate-hyaline. Baso-lateral sclerites rather large, irregular.

Female unknown.

Coloration. Ochreous brown (discoloured?). Face concolorous with antennal scrobae, fastigium frontis except median ocellus, lateral parts of clypeo-frontal suture and suture along bases of mandibles dark brown. Pronotum dark brown with little conspicuous pattern: a light spot before transverse sulcus, another spot in the groove before flat apical area; ventral and apical areas of paranota pale brown. Tegmen with light veins and veinlets and dark cells. Little conspicuous dark spots also on scapus, pedicellus and in tympanal region of fore tibia.

Measurements of male: body 30; pronotum 8.3; tegmen 26.5; hind femur 18.5.

Etymology. The name refers to the expanded margin between both internal teeth of the male cerci.