Xanthogryllacris lineata, 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 : 90-91

Xanthogryllacris lineata sp. nov.

Figs. 29 C–E, 30I–J

Material examined. Holotype (female): Mt. Kinabalu , Poring, elev. 500–700 m (6°5'N, 116°33'E), 1.xi.1996, leg. A. Floren (tree nr. 90)—(Bonn ZFMK).

Other specimens: East Malaysia: Sabah, Bergil, (6°13'7.21''N, 116°44'13.54''E), 2006, leg. A. Floren (tree B40)— 1 female (paratype) (Bonn ZFMK).

Diagnosis. X. lineata sp. nov. and X. punctata sp. nov. differ from other species of the genus by the distinctly outlined fastigium frontis that is little elevated, ivory white with or without a faint yellowish taint thus contrasting to the frons and has a black spot in upper area. X. lineata sp. nov. differs from X. punctata by a wider face, the tegmen is unicolored without dark spots, and the hind wings when spread are about as wide as long and the dark bands along the cross veins are wider and towards base fuse between the rows of cross-veins.

Description. Medium sized species. Head: Face not particularly large; in frontal view roughly oval; forehead nearly smooth, sparsely punctate; fastigium verticis wider than scapus; lateral ocelli between bases of antennae large and elongate, strongly swollen in between a large, black, sunk-in median pseudocellus with rough surface, situated above transverse fastigial suture while median ocellus usually situated below fastigial suture ( Fig. 29E ). Abdominal tergites two and three without stridulatory pegs.

Wings reaching about tip of hind femur ( Figs. 29 C–D). Tegmen: Radius with two branches, dividing behind end of basal third of tegmen, both forked near tip; media anterior fused in basal area with radius and divides just before RS from R, afterwards single-branched; media posterior absent; cubitus anterior forks into two veins behind end of basal third of tegmen, both undivided; cubitus posterior undivided, free throughout; with 4 anal veins, last two with common stem.

Legs: Fore coxa with large 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; on fore tibia spines black and longer than on mid tibia; hind femur with small 10–12 external and 8–10 internal spines on ventral margins, increasing in size towards posterior end; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color light to medium brown (originally conserved in alcohol); vertex and pronotum with indistinct dark ornaments; femora with thin dark strokes. Face and genae, lateral areas of clypeus and labrum, and mandibles blackish brown; compound eyes black; fastigium (except for black pseudocellus) and antennal scrobae medium to reddish brown; antennae yellowish brown; palpi light yellowish. Tegmen yellowish transparent, veins yellow; hind wing transparent with brownish veins, in anterior area yellow veins, towards center cross-veins surrounded by oval brownish spots becoming larger towards base, in basal area wing fully brown.

Male unknown.

Female. Seventh abdominal sternite normal, little wider than preceding sternite and separated by deep furrows from preceding sternite and following subgenital plate. Subgenital plate roughly triangular, furrowed in midline, at base little widened on both sides; apex shortly bilobate ( Figs. 30 I–J). Ovipositor very long, longer than shrunk body or hind femur, moderately curved dorsad; at tip slightly widened, tip obliquely truncate ( Fig. 29C ).

Measurements (2 females).—body w/wings: 29–35; body w/o wings: 20–28; pronotum: 5; tegmen: 21.0–24.5; tegmen width: 7.5–8.5; hind femur: 16–18; antenna: 150–180; ovipositor: female 24–25 mm.

Etymology. Named for the hieroglyphic lines on pronotum; from Latin linea (line).

Figures

FIGURE 29. Genus Xanthogryllacris: A–B, X. punctipennis aurantiaca (Brunner, 1888) male lectotype; C–E, X. lineata sp. nov. female holotype; F–H, X. punctata sp. nov. male holotype.—Habitus dorsal view (A, D, F), habitus lateral view (C), face (B, E, G), stridulatory pegs on second and third abdominal tergites, front is right (H). Scales 10 mm.

FIGURE 30. Genus Xanthogryllacris: A–C, X. punctipennis aurantiaca (Brunner, 1888) male lectotype; D–F, X. punctata sp. nov. holotype; G–H, X. inquinata (Karny, 1928) comb. nov. holotype; I–J, X. lineata sp. nov. holotype.—Male abdominal apex in ventral (A, E) and apical view (B, D, G), apical teeth of ninth abdominal tergite in higher magnification (C, F, H); female end of abdomen with seventh sternite, subgenital plate and base of ovipositor in ventral view conserved in alcohol (H) and after desiccation (I).