Phryganogryllacris gialaiensis fovealis, Ingrisch, 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 : 234-235

Phryganogryllacris gialaiensis fovealis ssp. nov .

Figs. 82 D–F, 83I, 84D

Material examined. Holotype (female): 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).

Diagnosis. Similar to the female of P. gialaiensis Gorochov, 2005 . It differs by the seventh abdominal sternite being less transverse but still wider than long and by the grooves at apico-lateral angles of that sternite, which are regularly oval and have the rim inside the groove distinctly sclerotised all around ( Fig. 84D ). The female subgenital plate is longer than in the latter species and about as long as the eighth sternite, while in P. gialaiensis it appears (fig. in Gorochov 2005) shorter than the even short eighth sternite. In size, the new subspecies is similar to the values given for P. gialaiensis ( Gorochov 2005) , but pronotum, wings and ovipositor are shorter.

Description. Small to medium sized species. Head: Face narrow ovoid; forehead nearly smooth with scattered shallow impressed dots; fastigium verticis wider than scapus; ocelli distinct; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows only indicated ( Fig. 83I ). Abdominal tergites two and three each with two oblique rows of stridulatory pegs (7, 10; 13, 20; n = 1).

Wings surpassing middle of stretched hind tibiae ( Fig. 82D ). Tegmen: Radius with two branches, both forked near tip; media anterior sub-fused in basal quarter with radius, veins attached to each other, but recognizable as two separate veins; cubitus anterior at base with a single branch that forks into two veins, the anterior branch makes a curvature and receives a very short oblique connection 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, the last short and arising from a common stem with preceding vein.

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 7–8 external and 11–13 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; dorso-internal apical spur 1.36 times longer than dorso-external spur (15:11) ( Fig. 82F ).

Coloration. General color uniformly yellowish brown. Face uniformly yellowish or greyish brown; compound eyes black. Tegmen semitransparent yellow at base and along midline, along fore and hind margins whitish; veins yellow; hind wing semitransparent white; veins yellow, cross-veins pale.

Male unknown.

Female. Seventh abdominal sternite of normal size; on both sides at latero-apical angle with a rather large and strongly sclerotised oval groove. Subgenital plate tongue-shaped, apex rounded ( Fig. 84D ). Ovipositor moderately long, regularly upcurved and with gradually approaching margins; before tip margins more strongly narrowing, tip narrow subobtuse ( Fig. 82E ).

Measurements (1 female).—body w/wings: 35; body w/o wings: 23; pronotum: 4.1; tegmen: 28; tegmen width: 9; hind femur: 12; antenna: 115; ovipositor: 11 mm.

Etymology. The new subspecies is named for the pair of distinct rounded grooves before the end of the seventh abdominal sternite in female; from Latin fovea (rounded groove).

Figures

FIGURE 82. Genus Phryganogryllacris: A–C, P. extensa sp. nov. female holotype; D–F, P. gialaiensis fovealis ssp. nov. female holotype; G–J, P. nonangulata sp. nov. male holotype (G, J) and female (H–I); K–L, P. phryganoides thailandensis Gorochov, 2005 male.—Habitus dorsal view (A, D, G, H, K); habitus lateral view (B); abdomen apex and ovipositor (E, I); apical area of left hind tibia in dorsal view (C, F, J, L). Scales 10 mm.

FIGURE 83. Genus Phryganogryllacris: A–E, P. nonangulata sp. nov. holotype (A–D), female (E); F–H, P. phryganoides thailandensis Gorochov, 2005; I, P. gialaiensis fovealis ssp. nov. holotype; J, P. extensa sp. nov. holotype.—Male abdominal apex in lateral (A), apical (B, G) and ventral view (C, H); face (D–F, I–J).

FIGURE 84. Genus Phryganogryllacris: A–C, P. nonangulata sp. nov.; D, P. gialaiensis fovealis ssp. nov. holotype; E–G, P. extensa sp. nov. holotype; H, P. phryganoides thailandensis Gorochov, 2005.—Female end of abdomen with seventh sternite, subgenital plate and base of ovipositor in lateral (A, E) and ventral view (B, D, F); stridulatory pegs on second and third abdominal tergites, front is left (C, G–H).