Holochlora falcata Tan, Liu & Ingrisch, 2024

Tan, Ming Kai, Liu, Chunxiang, Ingrisch, Sigfrid, Japir, Razy & Chung, Arthur Y. C., 2024, An account on the Phaneropterinae (Tettigonioidea: Tettigoniidae) from the highlands of western Sabah, Zootaxa 5443 (4), pp. 451-494 : 464-467

Holochlora falcata Tan, Liu & Ingrisch , sp. nov.

( Figs 9G–I , 10G–I , 11E, 11F , 12C , 13B , 16 )

Material examined. EAST MALAYSIA: Sabah State • ♂ holotype; Mount Trus Madi, Trusmadi Entomology Camp ; N5.44307, E116.45155, 1192.0± 5.6 m.a.s.l.; 31 October 2023, 20h33–20h49; attracted to light trap near camp; coll. M.K. Tan, J.L. Yukang & A.Y.C. Chung; SBH.23.40 ( FRC)

Etymology. The species name refers to the characteristic falcated male cercus.

Diagnosis. The new species is characterised by the combination of the following male characters: tenth abdominal tergite with a raised triangle in middle; posterior margin broadly rounded, in middle with two bulbous lobes; the lobes are obtusely rounded; between the lobes narrowly emarginated. Cercus large, flattened and strongly curved, with apex flattened tooth-like, truncated. Subgenital plate broad basally, narrowing in basal third into a narrow shaft with its lateral margins parallel. At the apical end with two lateral lobes; the apical lobes slightly longer than half the length of the subgenital plate; between the lobes broadly and angularly emarginated. Styli are flattened, elongate, with apices rounded.

Description. Habitus typical for genus; medium in size compared to congeners; head, pronotum, tegmina and legs when alive generally green, yellow when preserved ( Figs 9G, 9H , 13B ). Eyes in dorsal view globular and slightly protruding anteriorly; in frontal view slightly longer ( Figs 9H, 9I ). Frontal rostrum somewhat flattened, triangular, stout, with rounded apex and median sulcus indistinct ( Fig. 9H ). Antennal scapus with a tint of pinkish red; pedicles mainly pinkish red; and segments pinkish red ( Figs 9H, 9I ). Face and mouthparts generally light coloured, median ocellus large and pyriform ( Fig. 9I ). Pronotal disc with anterior margin straight in middle, posterior margin rounded ( Fig. 9H ); pronzona 1.4 times longer than metazona. Pronotal lobe 1.2 times taller than long; ventral margin short and rounded ( Fig. 9G ). Tegmen relatively narrow and unicolourous green ( Fig. 13B ). Legs generally green. Fore tibia with inner tympanum conchate, slightly swollen, with broad slit opening, around tympanum and knee black ( Fig. 10G ); with outer tympanum pyriform ( Fig. 10H ). Hind femur with genicular area green, external lobes bispinose, dorsal spine subacute, ventral spine acute ( Fig. 10I ).

Male. Left tegmen with vein 1A swollen, typical for genus, somewhat transversely oblong but at anal end slightly narrower ( Fig. 11E ); right tegmen with vein 1A mostly substraight with basal end faintly curved and mirror bowl-shaped with distal end distinctly shorter than basal end ( Fig. 11F ). Stridulatory file on left tegmen stout, typical for genus; straight with ca. 30 fairly widely-spaced, equally-spaced and equally-sized teeth and 7 additional smaller stout teeth at basal end ( Fig. 12C ). Abdominal apex as shown in Fig. 16 : tenth abdominal tergite in middle with raised triangle; its posterior margin broadly rounded, in middle with two bulbous lobes; lobes obtusely rounded; between lobes narrowly emarginated. Cercus large, flattened and strongly curved, with apex flattened tooth-like, truncated. Subgenital plate broad basally, narrowing in basal third into narrow shaft with lateral margins parallel. At apical end with two lateral lobes; apical lobes slightly longer than half the length of the subgenital plate; between lobes broadly and angularly emarginated. Styli flattened, elongated, with apices rounded.

Female. Unknown.

Measurements (♂ holotype, in mm). BL = 18.9; BWL = 44.9; PL = 5.4; PW = 3.5; TL = 36.9; TW = 6.3; HWT = 3.4; HFL = 20.2; HFW = 2.4; HTL = 23.4.

Ecology. This species was attracted to light. It is probably an arboreal species.

Distribution. Borneo (Mount Trus Madi in Sabah)

Type locality. EAST MALAYSIA: Sabah: Mount Trus Madi

Figures

FIGURE 9. Holochlora annulicornis Karny, 1926 (A–C), Holochlora bulbosa Tan, Liu & Ingrisch, sp. nov. (D–F), Holochlora falcata Tan, Liu & Ingrisch, sp. nov. (G–I), Holochlora bispinosa Tan, Liu & Ingrisch, sp. nov. (J–L) and Holochlora cratera Tan, Liu & Ingrisch, sp. nov. (M–O) head and pronotum in lateral (A, D, G, J, M) and dorsal (B, E, H, K, N) views; face in anterior view (C, F, I, L, O). Scale bars: 5 mm (all except C, F, I, L, O); 2 mm (C, F, I, L, O).

FIGURE 10. Holochlora annulicornis Karny, 1926 (A–C), Holochlora bulbosa Tan, Liu & Ingrisch, sp. nov. (D–F), Holochlora falcata Tan, Liu & Ingrisch, sp. nov. (G–I), Holochlora bispinosa Tan, Liu & Ingrisch, sp. nov. (J, K) and Holochlora cratera Tan, Liu & Ingrisch, sp. nov. (L–N) inner tympanum (A, D, G, J, L) and outer tympanum (B, E, H, M); hind knee in external view (C, F, I, K, N). Scale bars: 1 mm.

FIGURE 11. Holochlora annulicornis Karny, 1926 (A, B), Holochlora bulbosa Tan, Liu & Ingrisch, sp. nov. (C, D), Holochlora falcata Tan, Liu & Ingrisch, sp. nov. (E, F), Holochlora bispinosa Tan, Liu & Ingrisch, sp. nov. (G, H) and Holochlora cratera Tan, Liu & Ingrisch, sp. nov. (I, J) stridulatory area on the left (A, C, E, G, I) and right (B, D, F, H, J) in dorsal view. Scale bars: 2 mm (C, D), 1 mm (all except C, D).

FIGURE 12. Holochlora annulicornis Karny, 1926 (A), Holochlora bulbosa Tan, Liu & Ingrisch, sp. nov. (B), Holochlora falcata Tan, Liu & Ingrisch, sp. nov. (C), Holochlora bispinosa Tan, Liu & Ingrisch, sp. nov. (D) and Holochlora cratera Tan, Liu & Ingrisch, sp. nov. (E) stridulatory file on the left tegmen in ventral view. Scale bars: 1 mm.

FIGURE 13. Holochlora bulbosa Tan, Liu & Ingrisch, sp. nov. (A), Holochlora falcata Tan, Liu & Ingrisch, sp. nov. (B), Holochlora bispinosa Tan, Liu & Ingrisch, sp. nov. (C) and Holochlora cratera Tan, Liu & Ingrisch, sp. nov. (D) ♂ habitus in lateral view. Scale bars: 1 cm.

FIGURE 16. Holochlora falcata Tan, Liu & Ingrisch, sp. nov. ♂ holotype: abdominal apex in dorsal (A), posterior (B) and lateral (C) views; subgenital plate in ventral view (D). Scale bars: 2 mm (A–C), 1 mm (D).