Diaphanogryllacris annamita annamita ( Griffini, 1909d )

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 : 157-158

Diaphanogryllacris annamita annamita ( Griffini, 1909d)

Figs. 54A , 55D , 57 A–B, 58H–I

Material examined. Vietnam: Annam, Phuc-Son , elev. 8 m (15°23'N, 108°8'E), Nov. – Dec., leg. H. Fruhstorfer— 1 female, Bonn ( ZFMK); Central Vietnam, Bach Ma N.P., (16°12'N, 107°52'E), 12–17.vii.2011, leg. J. Constant & J. Bresseel (I.G. 31.933)— 3 males (Brussels RBINS) .

Diagnosis. Males can be identified by the apical projections on both sides of the apical excision of the ninth abdominal tergite having a wide compressed base and then are nearly angularly down-bent into long, narrow, and slightly curved spines with acute tip. The upcurved central projections of the tenth tergite are bulging in anterior area and provided with a medium long acute tip. Females have the seventh abdominal sternite membranous with a tubercle at tip and the subgenital plate is little narrowed in middle with apical area triangular with rounded tip.

Additional Description. Medium sized species. Head: Face oval, surface little rough (artifact?); fastigium verticis wider than scapus; ocelli visible; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows shallow ( Fig. 55D ). Abdominal tergites two and three each with two rows of stridulatory pegs (9, 12+1; 11, 18; n = 1 male).

Wings reaching about middle of stretched hind tibia ( Fig. 54A ). Tegmen: Radius with two branches, both forked near tip; media anterior free, in subbasal area closely approached to radius; cubitus anterior at base with a single branch that forks into two veins, the anterior branch makes a curvature, receives an oblique cross vein from MA and shortly after divides again 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, last two with common stem.

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 smaller ventral spurs; hind femur with 6–7 external and 8 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine; with 3 apical spurs on both sides.

Coloration. General color light brown; vertex black, on fastigium verticis alternating with 3 brown bands, pronotum with a large black spot, anterior angles, hind margin and few small spots brown; legs uniformly brown. Face yellowish brown with black band from below compound eyes to clypeus. Tegmen semi-transparent white, veins and veinlets brown; towards base little darker; hind wing semi-transparent white, veins and veinlets brown.

Male. Eighth abdominal tergite only little prolonged. Ninth abdominal tergite rather short, little globular, apical margin emarginated on both sides, in middle little convexly projecting, vertically below emargination with narrow membranous zone, at lateral margins of emargination a compressed wide process suddenly, nearly rectangularly bent ventrad, narrow, round, with acute tip. Tenth abdominal tergite in middle and between projections of ninth tergite with a pair of processes with bulgy ventral and subacute apical area curved little towards body ( Figs. 57 A– B). Subgenital plate with little diverging lateral margins, apical margin on both sides concave, in middle with bicornute process; slightly curved styli inserted laterally at apical margin. Phallus with a narrow elongate but little sinuate sclerite with forked and recurved base, in situ embedded into a membranous sac ( Figs. 58 H–I).

Female. Seventh abdominal sternite completely membranous with a tubercle at tip. Subgenital plate wider in about anterior half, narrower and triangular with rounded tip in posterior half. Ovipositor elongate substraight with faintly approaching margins; tip with narrowed margins, subobtuse.

Measurements (3 males).—body w/wings: 41–47; body w/o wings: 30–33; pronotum: 5.5–6.5; tegmen: 32–35; tegmen width: 11.5; hind femur: 15.5–17.0; antenna: 100 mm.

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 55. Genus Diaphanogryllacris: A, D. annamita tenera ssp. nov.; B, D. opulenta sp. nov.; C, D. sinuata sp. nov.; D, D. annamita (Griffini, 1909); E, D. normalis Gorochov & Wozn., 1999; F, D. recta sp. nov.; G–H, D. panitvongi Gorochov et al., 2015 from Con Son Island (G) and from Nam Nao (H); I, D. recta? from Cham Chu; J, D. normalis Gorochov & Wozn., 1999 mirror image; K, D. opulenta sp. nov.—Face (A–I), stridulatory pegs on second and third abdominal tergites, front is left (J–K).

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.

FIGURE 58. Genus Diaphanogryllacris: Male phallus sclerites with surrounding membranes, partly freed: A–B, D. annamita tenera ssp. nov.; C–E, D. sinuata sp. nov. paratype (C) and holotype (D–E); F–G, D. recta sp. nov.; H–I, D. annamita (Griffini, 1909); J, D. panitvongi Gorochov et al., 2015 from Siem Reap; K–N, D. opulenta sp. nov., in top view (A, C–D, F, H, J), lateral view (B, E, G, I, N), oblique lateral view (M), oblique proximal view (K–L).