Diaphanogryllacris translucens translucens ( Serville, 1838 )

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 : 174

Diaphanogryllacris translucens translucens ( Serville, 1838)

Figs. 54C , 57G

Material re-examined. Indonesia: North Sumatra, Medan , leg. L. Fulmek— 1 male (ex coll. Ebner, Wien NHMW) ; South Sumatra, Lampongs, Wai Lima , 1.xi.–31.xii.1921, leg. Karny & Siebers (no. 153)— 1 female (Wien NHMW) ; West Sumatra, Fort de Kock [Bukittinggi], elev. 920 m (0°15'47.36''S, 100°23'1.05''E), 1–31.x.1931, leg. E. Jacobson— 1 female (Wien NHMW) .

Description. Medium sized to large species. Head: Face ovoid; forehead nearly smooth with scattered impressed dots; fastigium verticis wider than scapus; ocelli distinct; fastigium frontis separated from fastigium verticis by a fine suture; subocular furrows distinct.

Wings nearly reaching tip of stretched hind tibia ( Fig. 54C ). Tegmen: Radius with two branches, both forked near tip; media anterior free from base but leans on radius in subbasal area, occasionally fused for a short distance in subbasal area; cubitus anterior at base with a single branch that forks into two veins, the anterior branch makes a curvature and receives a connection branch from MA, shortly after it divides into two parallel branches, MP and CuA1, while the posterior branch (CuA2) does not divide further; cubitus posterior undivided, free throughout; with 4 anal veins.

Coloration. General color brown with dark marbleization. Face yellow brown, little darker along subocular furrows. Tegmen semi-transparent, suffused with brown, but areas along fore and hind margins clear; hind wing semi-transparent light, along fore margin little suffused; main veins dark brown to black; cross veins yellow to brown.

Male. Eighth abdominal tergite only little prolonged. Ninth abdominal tergite with apical area sloping down; apical margin subtruncate, faintly produced on both sides of middle, margin in between concave and with a pair of short, basically membranous, apically stiff conical projections pointing laterad. Tenth abdominal tergite narrow, band-shaped, in middle with a pair of short, straight, acute projections standing on a little swollen base, pointing dorso-apically and little laterally (Fig, 57G). Epiproct triangular. Subgenital plate little vaulted, apical margin in middle with a pair of compressed lobate projections; styli inserted at apico-lateral angles of subgenital plate.

Female. Seventh abdominal sternite largely membranous; anterior sclerotised area rather short, followed by a transverse groove. Subgenital plate long semi-ovoid, simple. Ovipositor elongate, little curved; tip subacute.

Discussion. The type species of the genus, Diaphanogryllacris translucens , has the male ninth abdominal tergite with the apical margin in middle little projecting as in other species of the genus but apical projections terminating into a spine are completely missing, which is in contrast to most other species assigned to the genus so far. The tenth abdominal tergite is narrow band-shaped, split in midline and provided on both sides of midline with a projection as in other species of the genus that is however simply conical with subacute tip and pointing posteriorly.

Figures

FIGURE 54. Genus Diaphanogryllacris, habitus dorsal view: A, D. annamita (Griffini, 1909) male; B, D. simulator Gorochov & Wozn., 1999 male; C, D. translucens (Serville, 1838) male; D–E, D. normalis Gorochov & Wozn., 1999 male (D) and female (E); F–I, D. panitvongi Gorochov et al., 2015 from Con Son Island female (F) and male (G), female from Nam Nao (H), male from Angkor Preah Khan (I). Scales 10 mm.

FIGURE 57. Genus Diaphanogryllacris: A–B, D. annamita (Griffini, 1909); C–D, D. panitvongi Gorochov et al., 2015 from Siem Reap; E, D. normalis Gorochov & Wozn., 1999; F, D. panitvongi Gorochov et al., 2015 from Con Son Island; G, D. t. translucens (Serville, 1839); H, D. simulator Gorochov & Wozn., 1999; I, D. laeta (Walker, 1869) [holotype of G. chinensis Brunner, 1888 BrW14.463] male; J–K, D. aequalis (Walker, 1859) [K, lectotype of G. annulata Brunner, 1888 BrW16.117] male—A–I, Male abdominal apex in apical (A, D–G, I–K) and in lateral view (B–C, H).—Abbreviations: 9th ninth abdominal tergite, 10th tenth abdominal tergite, ce cercus, e epiproct, pa paraproct, ph phallus, sg subgenital plate, st stylus. The arrows point at the spines at apical margin of ninth and tenth tergite.