Gryllacris (Pardogryllacris) ovulicauda, 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 : 62-63

publication ID 10.11646/zootaxa.4510.1.1

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Gryllacris (Pardogryllacris) ovulicauda

sp. nov.

Gryllacris (Pardogryllacris) ovulicauda View in CoL sp. nov.

Figs. 10 View FIGURE 10 A–B, 12A, 13A–C, 16K, 17A

Material examined. Holotype (male): Vietnam: Cat Tien NP, (11°26'N, 107°26'E), 6–16.vii.2012, leg. J. Constant & J. Bresseel (I.G.: 32.161)—(Brussels RBINS). GoogleMaps

Other specimens: Vietnam: same data as holotype— 5 females, 2 males (paratypes) (Brussels RBINS); Dong Nai Biosphere Res., (11°18'N, 107°6'E),–6.vii.2012, leg. J. Constant & J. Bresseel (I.G.: 32.161)— 1 male (paratype) (Brussels RBINS) GoogleMaps .

Diagnosis. The male eighth and ninth abdominal tergites of the new species are similar to those of G. pardalina Gerstaecker, 1860 . It differs by the ninth tergite that has a distinctly longer stem and the apical oval extensions more clearly divided and wider, and the bi-triangular base is projecting and free as though the ninth tergite is hanging down from the eight tergite and both ends are free. The female of G. ovulicauda sp. nov. differs from that of G. pardalina by the subgenital plate that is provided with a pair of sinuate carinae that form an oval margin in apical area, and the apex is distinctly excised while in G. pardalina the subgenital plate is more gradually narrowed towards apex that is only faintly excised.

Description. Large species ( Fig. 10 View FIGURE 10 A–B). Head: Face narrow ovoid (F) to ovoid (M); forehead nearly smooth; fastigium verticis about as wide as or little wider than scapus; ocelli distinct; fastigium frontis separated from fastigium verticis by a faint suture interrupted in middle; subocular furrows only indicated as a weak depression above bases of mandibles; fastigium frontis laterally outlined by faint furrows ( Fig. 12A View FIGURE 12 ). Abdominal tergites two and three each with two rows of very small, hardly visible stridulatory pegs (M: 6, 4; 7, 10; F: 0, 4; 5).

Wings surpassing hind knees and almost reaching middle of stretched hind tibiae. Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius, in apical third of tegmen forks once (F) or unforked (M); media posterior absent; cubitus anterior forks into CuA1 and CuA2 (male) or stays singlebranched (female); cubitus posterior undivided, free throughout; with 4–5 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 ventral spurs; hind femur with 6–8 external and 8–11 internal spines on ventral margins; 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 brown; vertex unicolored; disc of pronotum with indistinct pattern, hind margin rim dark brown. Tegmen with little distinct darkened transverse veinlets in posterior area ( Fig. 10 View FIGURE 10 A–B). Legs of general color. Face medium brown with some indistinct lighter spots. Tegmen yellowish transparent, veins brown; in male with a spot of dark brown veinlets; hind wing along anterior margin yellowish transparent, otherwise ochre transparent, main veins brown; cross veins blackish brown bordered by a brown band on both sides.

Male. Eighth abdominal tergite strongly prolonged behind, along apical margin flattened and apical margin concave in middle. Ninth abdominal tergite much narrower than eighth and with central and basal areas hidden under that tergite; central area dorso-ventrally thickened and on underside with two small obtuse bumps; posterior area compressed, projecting from below eight tergite and divides in the same plane into two flattened ovoid lobes; anterior area curved down towards base and divides into two triangular lobes ( Figs. 13 View FIGURE 13 A–C). Subgenital plate almost twice as wide as long; lateral margins slightly convex; apical margin convex but notched in middle and on both sides of notch slightly projecting; styli stout and straight, inserted at the lateral angles. Phallus membranous.

Female. Seventh abdominal sternite wider than preceding sternites but rather short. Subgenital plate wide at base with stout, bulging and strongly converging lateral margins, posterior area ovoid but triangularly cut at tip; surface strongly grooved and in basal area between the bulging margins membranous; in middle of oval area with narrow elongate swelling finely fissured at tip ( Fig. 16K View FIGURE 16 ). Base of ovipositor dorsal valves with a pit with stiffened margin at very base. Ovipositor elongate but curved especially in subbasal area, with faintly approaching margins; dorsal margin with a slight expansion before tip ( Fig. 17A View FIGURE 17 ).

Measurements (4 males, 5 females).—body w/wings: male 41–61, female 44–50; body w/o wings: male 35– 44, female 34–36; pronotum: male 8.0–9.5, female 7–9; tegmen: male 35–42, female 32–36; tegmen width: male 12, female 12; hind femur: male 21–24, female 19–22; antenna: male 135–160, female 100–165; ovipositor: female 22–24 mm.

Etymology. The name refers to the bi-oval process of the male ninth abdominal tergite; from Latin ovum (egg) and cauda (tail).


Royal Belgian Institute of Natural Sciences













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