Celebogryllacris brevitegmina, 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 : 156-157

Celebogryllacris brevitegmina sp. nov.

Figs. 52 A–H

Material examined. Holotype male: Indonesia: Sulawesi, Sulawesi Utara, 1 km W Toraut, Dumoga Bone NP, elev. 200–300 m (0°34'17''N, 123°54'19''E), 2.ii.2006, leg. A. Weigel—(Erfurt NKME).

Diagnosis. The new species is very similar to C. helleri with regard to the male abdominal apex, but C. helleri has much larger wings. Since the holotype of C. helleri had originally been conserved in alcohol before it had been dried, the appendages of the abdominal apex are shrunk and somewhat distorted. Therefore a comparison of differences in fine details between these characters of C. helleri and those of the new species is hindered. The area of the apical swellings of ninth tergite is wider in C. brevitegmina than in C. helleri and near end strongly setose. The apical margin of the subgenital plate in C. brevitegmina has the concave central area wider than in C. helleri and the styli are provided with a distinct notch on internal margin. In general characters, the new species is smaller and has much shorter and narrower tegmina. The reduction of the tegmen obviously led to a reduction of veins thus that MA+MP+CuA have a common base while in C. helleri MA is free from base although closely approached to CuA and CuA divides into three branches.

Description. Rather small species. Head: Face ovoid; forehead nearly smooth ( Fig. 52B ). Abdominal tergites two and three each with two rows of stridulatory pegs (4, 10; 10, 12; n = 1 male; Fig. 52C ).

Wings covering about abdomen ( Fig. 52A ). Tegmen: Radius with radius sector branching in about apical third of tegmen; both additionally branching near tip. On left tegmen media fused with cubitus anterior at base, on right tegmen sub-fused, very closely approached, it separates in subbasal area and approaches but not fuses with radius, in about mid-length it divides into media anterior and media posterior; cubitus anterior fused with media at base; after separation unbranched; cubitus posterior single branched and free throughout; with 3 anal veins.

Legs: Fore coxa with 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 5–6 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 each; with 3 apical spurs on both sides of which the dorsal internal spur is curved and distinctly longer than the dorsal external spur.

Coloration. General color yellowish brown. Face unicolored pale yellowish brown; compound eyes black; clypeus ivory white with dark rim, labrum dark brown with ivory white base. Tegmen yellowish semi-transparent; hind wing semitransparent, veins yellow.

Male. Eighth abdominal tergite prolonged and little globular, in posterior area down-curved. Ninth abdominal tergite in subbasal area strongly bent, basal area vertical, main part of ninth tergite almost on underside of eighth tergite; except at base deeply furrowed and membranous along midline, at both sides of furrow with a globular swelling that narrows into a setose process pointing proximad and carries at tip a stout, black, little granular stylus with blunt tip; the processes of both sides do not cross each other and are in situ hidden between the underside of the eight tergite and the subgenital plate ( Figs. 52 D–H). Tenth abdominal tergite absent. Subgenital plate rather short and vaulted, with upcurved lateral and apical margins; lateral margins convex; apical area in apical view little depressed in middle with concave dorsal margin, swollen on both sides and ventrally; styli small, sitting on top of lateral margins, on internal margin with a small notch ( Fig. 52F ). Phallus membranous.

Female unknown.

Measurements (1 male).—body w/wings: 22; body w/o wings: 21; pronotum: 4.3; tegmen: 16; tegmen width: 6; hind femur: 12 mm.

Etymology. The new species is named for its shortened wings compared to the otherwise similar C. helleri . It is a combination of Latin brevis (short) and tegmen.

Figures

FIGURE 52. A–H, Celebogryllacris brevitegmina sp. nov. male holotype: A, habitus dorsal view; B, face; C, stridulatory pegs on second and third abdominal tergites (front is left); D–H, male abdominal apex in dorso-apical (D), lateral (E) and ventroapical view (F), focus on end of ninth tergite in higher magnification (G, H).—I, Capnogryllacris (Dictyogryllacris) signatifrons (Serville, 1838) male abdominal apex; J–K, C. (D.) raapi (Griffini, 1908) face (J) and habitus lateral view (K); L, C. (D.) reticulata uzeliana (Griffini, 1915) female holotype head, pronotum and tegmen dorsal view (L).