Asarcogryllacris (Asarcogryllacris) parapat, 2018

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 : 123

Asarcogryllacris (Asarcogryllacris) parapat sp. nov.

Figs. 40C , 41 E–H, 102C

Material examined. Holotype (female): Indonesia: North Sumatra, between Pematang Siantar—Parapat, Hutan Penelitian , elev. 1100 m (2°47'N, 98°55'E), 7.iii.1993, leg. S. Ingrisch—(Bonn ZFMK).

Diagnosis. The new species is similar to A. kerinciensis Gorochov, 2005 , described after a female from Jambi province. It differs by longer wings (tegmen 21 against 12.5 mm) and a twice as long ovipositor (16 against 8 mm). The female subgenital plate is more widely rounded than in A. kerinciensis and with little upcurved lateral areas. The female seventh abdominal sternite is similar in both species with a longer basal area with subparallel margins and furrowed in midline but not dividing posteriorly as in A. kerinciensis and the shorter apical area divided into two plates separated from basal area by a step but of different surface structure than in A. kerinciensis ( Figs. 41 F– H). In the specimen at hand, the seventh sternite is collapsed along midline with both halves pressed together.

Description. Medium sized species. Head: Face narrow ovoid; fastigium verticis little wider than scapus; ocelli small but distinct; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows weak. Abdominal tergite two with one and tergite three with two rows of small stridulatory pegs (0, 8; 14, 24; n = 1 female).

Wings surpassing hind knees ( Fig. 40C ). Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius, shortly after it frees it divides into two branches, MA and MP; cubitus anterior and cubitus posterior both single branched, free throughout; with 3 anal veins.

Legs: Fore coxa with a 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 9 external and 12–16 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine; with 3 apical spurs on both sides.

Coloration. General color brownish ( Fig. 102C ); head reddish brown with 4 indistinctly darker spots on vertex; pronotum light brown with dark brown rim and two broad dark brown lateral bands on disc; legs light medium brown with some darker spots in genicular area; dorsal spines on hind tibia black. Face brownish with some indistinct lighter and darker patterns. Tegmen semi-transparent white, towards base darkened, in area behind subcosta densely covered with very short brown hairs, giving the area a dark appearance; veins dark brown, only costa and subcosta light yellow; hind wing semi-transparent white, a very small spot at anterior apical end of wing covered with short brown hairs; veins and veinlets brown.

Male unknown.

Female. Seventh abdominal sternite at apical margin prolonged into a long and flattened glossy plate that is little narrower than width of sternite and at tip triangularly excised. Subgenital plate simple, wider than long; apical margin convex ( Figs. 41 F–H). Base of ovipositor normal. Ovipositor elongate, only slightly curved, margins very slightly approaching apically; tip subacute ( Fig. 41E ).

Measurements (1 female).—body w/wings: 29; body w/o wings: 28; pronotum: 4; tegmen: 21; hind femur: 12; tegmen width: 6; antenna: 120; ovipositor: 16 mm.

Etymology. Named after the type locality; noun in apposition.

Figures

FIGURE 40. Genus Asarcogryllacris: A–B, A. m. ardjunae Karny, 1937 male; C, A. parapat sp. nov. female holotype; D–F, A. robusta sp. nov. female holotype; G–I, A. brevis sp. nov. female holotype.—Habitus dorsal view (A, C, D, G), face (B, H, F), apical area of left hind tibia (E), stridulatory pegs on 2nd and third abdominal tergites (front is left, I). Scale 10 mm (A, C, D, G with equal magnification).

FIGURE 41. Genus Asarcogryllacris: A–D, A. m. ardjunae Karny, 1937; E–H, A. parapat sp. nov.; I–K, A. brevis sp. nov.; L– N, A. robusta sp. nov.—Habitus female in lateral view (A, E), female end of abdomen in ventral view (B, F, J–K, M) and in lateral view (G–H, N ventral side is left!), ovipositor (I, L), male abdominal apex in apical (C) and lateral view (D). Scales 10 mm.

FIGURE 102. A, Asarcogryllacris (Asarcogryllacris) macilenta ardjunae Karny, 1937 male; B, do. female; C, Asarcogryllacris (Asarcogryllacris) parapat sp. nov. female; D, Gryllacris signifera signifera (Stoll, 1813) male; E, do. female; F, Asarcogryllacris (Asarcogryllacris) brevis sp. nov. female holotype; G, Otidiogryllacris auriculata auriculata (Krauss, 1902) male; H, do. female; I, Caustogryllacris podocausta podocausta (Haan, 1842) male; J, Eremus tigris sp. nov. male.