Gryllacris (Gryllacris) signifera signifera ( Stoll, 1813 )

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 : 45

publication ID	https://doi.org/ 10.11646/zootaxa.4510.1.1
publication LSID	lsid:zoobank.org:pub:EAA35595-0972-4CF8-A128-16267A59112B
DOI	https://doi.org/10.5281/zenodo.5986936
persistent identifier	https://treatment.plazi.org/id/53599456-977B-FFAD-FF75-FEE0FF13B843
treatment provided by	Plazi
scientific name	Gryllacris (Gryllacris) signifera signifera ( Stoll, 1813 )
status

Treatment

Gryllacris (Gryllacris) signifera signifera ( Stoll, 1813) View in CoL

Figs. 2C View FIGURE 2 , 10 View FIGURE 10 E–F, 12E, 13J–M, 16A–B, 17E, 102D–E

Material examined. Indonesia: West Java, Batavia [= Jakarta], (6°10'S, 106°48'E), 1908, leg. Dr. Siebert— 1 male (Museum Wiesbaden); Bogor, Botanical Garden, 21.iii.1993, S. Ingrisch— 1 female (Bonn ZFMK); Palabuan Ratu, Samudra beach, 3–6.iii.1995, S. Ingrisch— 1 male, 1 female (Bonn ZFMK) GoogleMaps .

Description. Medium sized species. Head: Face narrow ovoid; fastigium verticis about as wide as scapus; ocelli little 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 ( Fig. 12E View FIGURE 12 ). Abdominal tergites two and three with minute stridulatory pegs (4, 6–9; 5–7, 11–12; n = 2 females).

Wings surpassing hind knees ( Fig. 10 View FIGURE 10 E–F). Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius (in the male from Batavia RS branches from MA not from R); 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 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 ventral spurs ( Fig. 2C View FIGURE 2 ); 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 preapical spine each; with 3 apical spurs on both sides.

Coloration. General color light brown ( Figs. 102 View FIGURE 102 D–E); disc of pronotum adorned with black hieroglyphic figure (roughly composed of 4 sinuate or curved long lateral dark bands and a short straight medial band together with some small spots), posterior margin with rim dark brown. Vertex with a round black spot in middle and black bands on both sides. Legs light brown. Face medium brown with some indistinct lighter spots; antennal scrobae dark. Tegmen yellowish transparent, veins yellow to pale brown; hind wing along anterior margin yellowish transparent, otherwise ochre transparent, main veins brown; cross veins blackish brown adorned by a narrow brown band on both sides.

Male. Eighth abdominal tergite strongly prolonged behind. Ninth abdominal tergite (type F in Brunner 1888) wide at base; dorsal apical margin prolonged into a short and narrow, setose projection with bifid tip; in about middle of projection with a few tubercles ( Figs. 13 View FIGURE 13 J–M). Underside of ninth tergite prolonged proximad, finally curved down and at bottom posteriorly and ends in a broad subtruncate tip with slight medial incision and short lateral cones. Subgenital plate about twice as wide as long; lateral margins straight, little diverging; apical margin wide-triangular but in middle little excised and on both sides of excision obtusely swollen; slightly curved styli inserted at lateral angles. Phallus membranous.

Female. Seventh abdominal sternite little wider than preceding sternites; otherwise normal. Subgenital plate rather long; wide at base with strongly converging lateral margins, constricted behind basal third, afterwards with convex lateral margins, apex slightly bi-lobate; area along lateral and apical margins elevated and in apical area little swollen; baso-central area occupied by a large groove that holds in about middle of subgenital plate a narrow elongate process with bifid apex, base of subgenital plate membranous with outlined triangular groove in middle ( Figs. 16 View FIGURE 16 A–B). Ovipositor elongate but curved throughout, with faintly approaching margins; before tip dorsal margin with a slight expansion ( Fig. 17E View FIGURE 17 ).

Measurements (2 males, 2 females).—body w/wings: male 34–38, female 36–38; body w/o wings: male 22– 32, female 28–32; pronotum: male 6.0–6.5, female 6.5; tegmen: male 25–27, female 23.5–25.0; tegmen width: male 10, female 9; hind femur: male 15–19, female 17; antenna: male 70–130, female 130; ovipositor: female 17– 18 mm.