Lyperogryllacris ocellata, 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 : 70-71

Lyperogryllacris ocellata sp. nov.

Figs. 19 I–J, 20D–F

Material examined. Holotype (male): East Malaysia: Sabah, Mt. Kinabalu, Poring , elev. 500–700 m (6°5'N, 116°33'E), 26.ii.1996, leg. A. Floren—(Bonn ZFMK).

Other specimens studied: same locality as holotype, 14.iii.1993, leg. A. Floren (tree nr. 5)— 1 male paratype (Bonn ZFMK).

Discussion. The new species has the coloration similar to that of L. nieuwenhuisi ( Karny 1931b) . That species was described after one female (the holotype) and two males (as allo- and paratype). The two males were however collected at a different locality from the female that leaves some doubt if they really belong to the same species as the female that has the cross-veins of the tegmen darkened by dark lateral bands except in anal area. The two males do not have this and also the extension of the dark color on the hind wing is less extended in both males than in the female. I therefore restrict my comparison with the new species to the female holotype.

Diagnosis. The new species is conspicuous for its large yellow median ocellus on a red brown face with black labrum and mandibles. It is characterized by the flattened tip of the male ninth abdominal tergite with a roughly triangular excision, which contains a pair of projections pointing mediad at base, then curved somewhat proximad and terminate into an acute black tooth at tip. Males of L. robinsoni ( Karny, 1926a) from Malaysia have a pair of recurved projections but with both teeth narrow and longer than in the new species and sitting on a wide base. The new species is also similar to L. nieuwenhuisi ( Karny 1931b) from Borneo (Kalimantan), but it differs from the female holotype of the latter by the large yellow median ocellus contrasting to the red-brown face, the absence of dark strokes along the cross-veins of the tegmen and less extended dark color on the hind wing. The male apex of the latter species is not described in enough detail to allow a comparison. The new species differs from both species compared by the large median ocellus contrasting to the red-brown face, in both other species it is inconspicuous on yellow surface.

Description. Medium sized species ( Fig. 19I ). Head: Face narrow ovoid, forehead with impressed dots and very fine transverse riffles; fastigium verticis little wider than scapus, separated by a fine suture from fastigium frontis; ocelli distinct, median ocellus rather large; subocular furrow distinct. Wings little surpassing hind knees ( Fig. 19J ). Tegmen: Radius releases RS before mid-length, both veins forked near tip; media anterior fused with radius in little more than basal third; media posterior absent; cubitus anterior simply dividing into two veins before mid-length of tegmen; cubitus posterior undivided, free throughout; with 4 anal veins, the last two veins with common base. Fore coxa with a spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of long ventral spines and one pair of shorter ventral spurs; hind femur with 10 external and 8–9 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins; ventral margins with one preapical spine; with 3 apical spurs on both sides.

Coloration. General color yellow brown; head and pronotum dark maroon. Face dark maroon with few scattered white dots, median ocellus and ventral area of clypeus yellowish; labrum and mandibles black; antennae yellowish but scapus brown. Tegmen semi-transparent yellow; veins and veinlets yellow, towards base brown; hind wing semi-transparent light ochre with veins brown, cross-veins nearly black, bordered by wide dark brown bands, leaving only a small oval spot in middle of cells light ochre; towards margin cells completely filled or nearly so.

Male. Ninth abdominal tergite globular, with strongly narrowing lateral margins and with a fine medial furrow; in apical area narrow and divided into two short and stout, obtuse lobes that carry at internal side of apex a compressed but little vaulted process with rounded tip except for the acute angular proximal angle ( Figs. 20D, F ). Subgenital plate wider than long, central area little prolonged between bases of styli; apical margin bilobate with rounded bottom between lobes; styli moderately long, inserted at posterior-lateral angles of plate ( Fig. 20E ). Phallus membranous.

Female unknown.

Measurements (2 males).—body w/wings: 27–33; body w/o wings: 18–24; pronotum: 5.0–5.5; tegmen: 23.0– 23.5; tegmen width: 7.5; hind femur: 16–17; antenna: 160 mm. Etymology. The new species is named for the large median ocellus.

Figures

FIGURE 19. Genus Lyperogryllacris: A–E, L. forcipata sp. nov. male holotype (A) and female paratype (B–E); F–H, L. khuntan sp. nov. male holotype; I–J, L. ocellata sp. nov. male holotype.—Habitus dorsal view (A, F, I), do. lateral view (B), face (C, G, J), female abdominal apex with ovipositor (D), female seventh abdominal sternite and subgenital plate (E), stridulatory pegs on second and third abdominal tergites, front is left (H).

FIGURE 20. Genus Lyperogryllacris: A–C, L. forcipata sp. nov. holotype; D–F, L. ocellata sp. nov. holotype; G–I, L. khuntan sp. nov. holotype.—Male abdominal apex in dorsal (A, D), ventral (B, E), apical (G), and oblique ventro-apical view (H); appendages of ninth abdominal tergite in greater enlargement, ventral margin is right (C, F, I).