Haplogryllacris bilobulata, 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 : 192-193

Haplogryllacris bilobulata sp. nov.

Figs. 66 A–C, 67A–B

Material examined. holotype (female): Thailand: Tak, Ban Mae Salit, Monkrating resort, elev. 700–800 m (17°30'N, 98°5'E), 18–21.ix.1989, leg. S. Ingrisch—(Bonn ZFMK) .

Diagnosis. The new species differs from H. castanea by shorter and narrower wings with the veins of tegmina running more parallel obviously due to reduced size compared to the male type of H. castanea . Compared to the H. castanea female from Indochina in NHMW, the new species differs by shorter wings, lighter face, distinctly less thickened hind femur, and by the seventh female abdominal sternite terminating into a pair of short compressed sub-angularly projecting latero-apical lobes separated by a short medial furrow ( Fig. 67B ) while the H. castanea female has near the lateral angles of that sternite small conchate projections.

Description. Medium sized to large species. Head rather large, wider than pronotum, robust; frons ovoid, forehead shagreened; fastigium verticis distinctly wider than scapus, separated by a concave suture from fastigium frontis; ocelli distinct; subocular furrows distinct ( Fig. 66B ). Abdominal tergites two and three each with two rows of stridulatory pegs (5, 12–13; 8–9,>10–13; Fig. 66C ).

Wings surpassing hind knees ( Fig. 66A ). Tegmen: Radius with two branches, both forked near tip; media anterior free from base, single-branched; cubitus anterior at base with a single branch that forks into two veins just behind basal quarter of tegmen; cubitus posterior undivided, free throughout; with 4 anal veins.

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 6–7 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 uniformly medium brown, ventral surface yellowish brown; fore legs with anterior margin dark brown. Face dorsal area, base of antenna and labrum red brown, central area blackish brown, compound eyes, ocelli and clypeus yellow, mandibles black, apical segments of maxillary palpi dark brown. Tegmen semitransparent yellow, along fore and hind margins whitish; veins yellow, cross-veins brown; hind wing semitransparent white; veins brown, cross-veins brown, towards base pale.

Male unknown.

Female. Seventh abdominal sternite prolonged, little bottleneck-shaped, subapical area narrowest; apical area widening laterally with bulging, down-curved margin, little grooved and with transverse furrows before apical margin; in middle of apical area with a distinct rimmed oval groove; apical margin concave. Subgenital plate separated by a rather short membranous zone from preceding sternite; about tongue-shaped with a faint furrow at tip ( Fig. 67B ). Base of ovipositor normal. Ovipositor elongate, slightly upcurved, most strongly in basal area; with gradually approaching lateral margins; tip subobtuse ( Fig. 67A ).

Measurements (1 female).—body w/wings: 44; body w/o wings: 37; pronotum: 5.5; tegmen: 31; hind femur: 17; tegmen width: female 11.5; ovipositor: female 17.5 mm.

Etymology. The name of the new species refers to the pair of lobules in the intersegmental membrane between the seventh abdominal sternite and the subgenital plate; from Latin lobuli (small lobes) and prefix bi (two).

Figures

FIGURE 66. Genus Haplogryllacris: A–C, H. bilobulata sp. nov. female holotype; D–E, H. castanea (Brunner, 1888) male holotype; F–G, H. verticalis (Burmeister, 1838) [type of H. latifrons (Brunner, 1888)]; H–I, H. simplex (Walker, 1871) [type of H. hieroglyphica (Brunner, 1888)] female.—Habitus dorsal view (A, D, F, H), face (B, E, G, I), stridulatory pegs on second and third abdominal tergites, front is left (C).

FIGURE 67. Genus Haplogryllacris: A–B, H. bilobulata sp. nov. holotype; C, H. simplex (Walker, 1871) [type of H. hieroglyphica (Brunner, 1888)]; D, H. verticalis (Burmeister, 1838) [type of H. latifrons (Brunner, 1888)]; E–F, H. simplex (Walker, 1871) det. Karny; G, H. simplex (Walker, 1871) holotype; H, H. castanea (Brunner, 1888) holotype.—Female habitus lateral view (A), female end of abdomen with seventh sternite, subgenital plate and base of ovipositor (B–C), male abdominal apex in ventral (D–E, G) and apical view (H), male head, pronotum and tegmen in dorsal view (F); the black arrow aims at the point where a short branch of MA fuses with a branch of CuA and shortly after divide into MP and CuA1; the blue arrows aim at the small spines at apical margin of ninth tergite.