Gryllacris (Gryllacris) peracca Karny, 1923

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 : 48-49

Gryllacris (Gryllacris) peracca Karny, 1923

Figs. 16 G–H, 17C

Gryllacris kledangensis Karny, 1923 syn. nov.

Gryllacris lombokiana Karny, 1926a syn. nov. (synonymised by Karny 1937 under G. kledangensis )

Material examined. Malaysia: Perak, Gunung Kledang , elev. 807 m (4°35'5.25''N, 101°1'19.4''E), 1–30.xi.1901 — 1 male (holotype) (London BMNH) ; Perak, Gunung Kledang , elev. 807 m (4°35'5.25''N, 101°1'19.4''E), 1 female (holotype of G. kledangensis ) (London BMNH) ; unknown locality (Lombok in lit. in error, probably Gunung Kledang see Karny 1937)— 1 female (holotype of G. lombokiana ) (London BMNH) .

Discussion. The synonymy of G. lombokiana with G. kledangensis was already established by Karny 1937. The description of the younger taxon was due to locality "mixup". G. kledangensis (1 female) and G. peracca (1 male) were both collected at the same locality, there are no morphological differences between both types except for sex specific characters, the slightly smaller size of the male falls within a supposed variation range of a species; there are also no differences in coloration (although mentioned in Karny 1923): the pronotum shows an extremely faint dark pattern in both specimens, and also the widths and extensions of the dark bands on the hind wings are identical; also the venation of the tegmina in both specimens fully agrees (but somewhat deviates in the female type of G. lombokiana , in which the two branches of CuA separate only in the apical third of tegmen while in both other specimens before mid-length. I thus have no doubt that both type specimens belong to the same species. The name G. peracca is chosen here as the dominant name as the type is a male, which in this genus shows better diagnostic characters than females, which may ease differentiation against other similar species.

Description. Medium sized to large species. Head: Face ovoid; forehead nearly smooth with shallow transverse riffles; fastigium verticis hardly wider than scapus; ocelli visible; fastigium frontis separated from fastigium verticis by a transverse suture; subocular furrows present.

Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius, afterwards single branched; media posterior absent; cubitus anterior forks between basal third and mid-length into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 4 anal veins. Legs: Fore coxa with a long spine at fore margin.

Coloration: General color uniformly brownish. Face rather uniformly reddish brown with yellowish ocelli. Tegmen semi-transparent yellow with yellowish brown veins, veinlets of lighter color; hind wing semi-transparent; main veins brown; cross-veins blackish and bordered on both sides by dark bands.

Male. Ninth abdominal tergite behind mid-length nearly rectangularly bent down and suddenly narrowed to posterior area, just before constriction with a small obtuse tubercle at both sides; posterior area with faintly converging, nearly subparallel margins; apical margin subtruncate. Apex of subgenital plate convex, very faintly excised in middle.

Female. Seventh abdominal sternite wider than long, of normal shape. Subgenital plate with widened base rather short; central area with subparallel lateral margins, very faintly converging; apical area bi-triangular with apex excised in between; surface little modified, faintly sunk-in in middle, at base swollen, the apical triangles with rather weak oval swellings; behind basal swelling with a very small, linear sclerite ( Figs. 16 G–H). (in the type of G. kledangensis one of the apical triangles is broken). Ovipositor long, moderately curved, with faintly approaching margins; tip with a slight pre-apical expansion ( Fig. 17C ).

Measurements partly after Karny (1923) (1 male, 2 females).—body w/wings: male 38, female 45; body w/o wings: male 29, female 31–38; pronotum: male 6.5, female 7–8; tegmen: male 29, female 32; tegmen width: male 10, female 11.0–11.5; hind femur: male 18.5, female 20.5–21.5; ovipositor: female 22.5–25.0 mm.

Figures

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).