Elbenia (Elbenia) paradigitata Gorochov, 2023

Elbenia (Elbenia) paradigitata Gorochov, 2023 View in CoL

( Figs 2A View FIGURE 2 , 3 View FIGURE 3 , 4 View FIGURE 4 )

Elbenia (Elbenia) paradigitata Gorochov, 2023b: 20 View in CoL View Cited Treatment .

New material examined. EAST MALAYSIA; Sabah State • 1♂; Sinipung Hill, near Long Pasia and Meligan ; N4.43564 E115.72317, 1298.0± 9.2 m.a.s.l.; 20 November 2024, 16h30; near leaf litter; coll. M.K. Tan; SBH.24.165 ( FRC) GoogleMaps • 1♂; Sinipung Hill, near Long Pasia and Meligan; N4.44538 E115.71494, 1556.0± 10.1 m.a.s.l.; 21 November 2024, 23h50; attracted to light trap; coll. M.K. Tan; SBH.24.218 ( ZRC) GoogleMaps .

Remarks. Our specimens most resemble Elbenia (Elbenia) paradigitata Gorochov, 2023 from Mount Trus Madi (see Gorochov, 2023b). The black patch of the stridulatory area is very similar: its left tegmen having irregularly transverse black patch covering vein 1A but not reaching the mirror ( Fig. 3A View FIGURE 3 ). The stridulatory file on the left tegmen also has a similar shape and similar number of teeth (circa 70) ( Fig. 3C View FIGURE 3 ). The shape of the posterior lobe of the male tenth abdominal tergite is similarly slender and narrowly spaced apart; although these lobes can be flexible and appear wider than in its natural shape ( Figs 3D–F View FIGURE 3 ). Their cerci are similar in their arcuate, long and slender shape, with its apical part directed medially and having an apex tooth-like ( Figs 3E–H View FIGURE 3 ). The subgenital plate is stout, not necessarily surpassing the apices of the tenth abdominal tergite lobes; its apex with a groove at the base very narrow before widening at its apical end ( Figs 3E, 3F, 3H View FIGURE 3 ).

Type locality. EAST MALAYSIA: Sabah: Mount Trus Madi .

Distribution. Borneo: Sabah State: Mount Trus Madi, Sinipung Hill [new locality record].

Natural history. Compared to the more commonly sighted species Elbenia (Elbenia) tenera Brunner von Wattenwyl, 1878 , this species was found deep inside the forest, rather than along forest edge or roads.

Calling song ( Fig. 4 View FIGURE 4 ). The calling song is an isolated echeme made up of two syllables. The average echeme duration is 25.0±1.1 ms (22.8–27.2 ms). The first syllable consists of two pulses and has an average duration of 4.6±1.0 ms (3.0–6.7 ms). The first pulse is of a higher energy than the second one and of a slightly longer duration (1.3±0.3 vs. 1.1±0.3 ms). The second syllable consists of three short pulses (duration = 0.3–1.0 ms) followed by a longer pulse (duration = 1.3–2.1 ms). The initial three pulses are of distinctly lower energy than the last pulse; consecutive pulses are of higher energy. The average duration of the second syllable is 6.4±1.0 ms (4.7–9.4 ms). The average down time (silent interval between the two syllables) is 14.0±1.4 ms (10.8–16.9 ms). The average period of syllable is 18.6±0.9 ms (15.7–20.4 ms). The first syllable is usually of a slightly lower amplitude than the last pulse of the second syllable. The frequency spectrum is broadband and is not symmetrical and has a peak frequency of 23.5±0.8 kHz (22.0–24.7 kHz). The spectrum also has a secondary peak at 10.8±0.5 kHz (10.2–11.3 kHz).