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

Gryllacris (Pardogryllacris) ovulicauda sp. nov.

Figs. 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).

Other specimens: Vietnam: same data as holotype— 5 females, 2 males (paratypes) (Brussels RBINS); Dong Nai Biosphere Res., (11°18'N, 107°6'E), 25.vi.–6.vii.2012, leg. J. Constant & J. Bresseel (I.G.: 32.161)— 1 male (paratype) (Brussels RBINS) .

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 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 ). 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 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 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 ). 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 ).

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).

Figures

FIGURE 10. Genus Gryllacris: Habitus dorsal view: A–B, G. (P.) ovulicauda sp. nov. male holotype (A) and female paratype (B); C, G. bancana Karny, 1930 male; D, G. v. vittata Walker, 1869 female holotype; E–F, G. s. signifera (Stoll, 1813) male (E) and female (F); G, G. f. fuscifrons Gerstaecker, 1860 male; H–I, G. obscura cambodiae Gorochov, 2007 female (H) and male (I); J, G. sok sp. nov. female holotype. Scales 10 mm.

FIGURE 12. Genus Gryllacris: Face: A, G. (Pardogryllacris) ovulicauda sp. nov. male holotype; B–C, G. obscura cambodiae Gorochov, 2007 male (B) and female (C); D, G. f. fuscifrons Gerstaecker, 1860 female holotype; E, G. s. signifera (Stoll, 1813) male; F, G. sok sp. nov. female holotype; G, G. incornuta sp. nov. male holotype; H, G. bancana Karny, 1930; I, G. o. obscura Brunner, 1888; J, G. v. vittata Walker, 1869 female holotype; K, G. kinabaluensis Griffini, 1915 female; L, G. (P.) longiloba Gorochov & Dawwrueng, 2015 female; M, G. (P.) lineolata menzeli (Karny, 1924) male; N, G. (P.) l. lineolata Serville, 1838 male; O, G. (Gigantogryllacris) bilineata sp. nov. male holotype; P, G.(Gi.) ligulata sp. nov. male holotype.

FIGURE 13. Genus Gryllacris: A–C, G. (Pardogryllacris) ovulicauda sp. nov. holotype; D–F, G. obscura cambodiae Gorochov, 2007; G–I, G. bancana Karny, 1930; J–M, G. s. signifera (Stoll, 1813).—Male abdominal apex in about dorsal (A), ventral (B, E, H, J), oblique lateral (C, F, I, K), apical (D, G, L), and oblique apical view (M).

FIGURE 16. Genus Gryllacris: A–B, G. s. signifera (Stoll, 1813); C–D, G. o. obscura Brunner, 1888; E–F, G. obscura cambodiae Gorochov, 2007; G–H, G. peracca Karny, 1923: holotype of G. kledangensis Karny, 1923 (G) and holotype of G. lombokiana Karny, 1926 (H); I, G. v. vittata Walker, 1869 holotype; J, G. sok sp. nov. holotype; K, G. (Pardogryllacris) ovulicauda sp. nov. paratype; L–M, G. kinabaluensis Griffini, 1915; N–O, G. f. fuscifrons Gerstaecker, 1860 (O, holotype).— Female subgenital plate in ventral (A–C, E, H–I, K–L, N–O), lateral (F, M), oblique lateral (D), and latero-ventral view (G, J).

FIGURE 17. Genus Gryllacris: A, G. (Pardogryllacris) ovulicauda sp. nov. paratype; B, G. o. obscura Brunner, 1888; C, G. peracca Karny, 1923: holotype of G. kledangensis Karny, 1923; D, G. obscura cambodiae Gorochov, 2007; E, G. s. signifera (Stoll, 1813); F, G. (P.) longiloba Gorochov & Dawwrueng, 2015; G, G. sok sp. nov. holotype; H, G. f. fuscifrons Gerstaecker, 1860 holotype; I, G. kinabaluensis Griffini, 1915; J–K, G. (P.) l. menzeli (Karny, 1924); L, G. (P.) longiloba Gor. & Dawwr., 2015; M–N, G. (P.) l. lineolata Serville, 1838—Female habitus lateral view (A–D, J), ovipositor (E–I), female subgenital plate in ventral view (K–L, N), subgenital plate with base of ovipositor in lateral view (M).