Itara (Singitara) singularis Gorochov, 1997

Tan, Ming Kai, Grumo, Kim C., Gono, Alfredo Iii A., Bahoy, Daphne Cayle M., Rivera, Rodrin R., Nuñeza, Olga Macas, Japir, Razy & Chung, Arthur Y. C., 2024, New species of Itara (Orthoptera: Grylloidea: Itarinae) and descriptions of calling songs from Mindanao and Sabah, Zootaxa 5424 (1), pp. 61-79 : 69

Itara (Singitara) singularis Gorochov, 1997

( Figs 6–9 )

Itara (Singitara) singularis Gorochov, 1997: 68 — Gorochov, 2007: 207 (record in Mount Trus Madi)

Material examined. EAST MALAYSIA: Sabah State: Mount Trus Madi • 1♂; Trusmadi Entomology Camp ; N5.44292, E116.45129, 1189.0± 5.6 m.a.s.l.; 1 November 2023, 19h03; attracted to light trap at the camp; coll. M.K. Tan, J.L. Yukang & A.Y.C. Chung; SBH.23.80 ( FRC) • 1♂; Trusmadi Entomology Camp ; N5.44292, E116.45129, 1189.0± 5.6 m.a.s.l.; 2 November 2023, 18h40; calling among shrub; coll. M.K. Tan, J.L. Yukang & A.Y.C. Chung; SBH.23.113 ( ZRC) ( Fig. 6 ) • 1♂; Trusmadi Entomology Camp ; N5.44174, E116.45074, 1189.0± 5.2 m.a.s.l.; 2 November 2023, 20h30; attracted to light trap at the ridge; coll. M.K. Tan, J.L. Yukang & A.Y.C. Chung; SBH.23.127 ( MNHN)

Remarks. The genitalia of our male specimens ( Fig. 7 ) resemble the ones described by Gorochov (1997, 2007).

Ecology. The species was found to be attracted to light towards the forest edge ( Fig. 8 ) and call among shrubs ( Fig. 6 ).

Type locality. SINGAPORE

Distribution. Malay Peninsula ( Singapore); Borneo (Sabah: Mount Trus Madi)

Calling song (1♂, 25.0°C) ( Fig. 9 ). The calling song consists of a series of echemes. Each echeme typically consists of 18±2 (15–21) discrete syllables and has an average duration of 0.55±0.05 s (0.45–0.64 s). The average interval between consecutive echemes is 0.46±0.08 s (0.25–0.69 s). Within each echeme, each syllable has an average duration of 23.6±0.5 ms (22.9–24.7 ms). The average interval between consecutive syllables is 7.2±0.4 ms (6.1–7.9 ms). The frequency spectrum is pure-tonal and forms a harmonic, with the energy peaking at the fundamental frequency of 4.59±0.00 kHz.

Figures

FIGURE 6. Itara (Singitara) singularis ♂ calling among shrubs at Mount Trus Madi.

FIGURE 7. Itara (Singitara) singularis ♂ male genitalia in ventral (only apical part) (A) and lateral (B) views; spermatophore in lateral view (C). Scale bars: 1 mm.

FIGURE 8. Itara (Singitara) singularis ♂ attracted to light at Mount Trus Madi.

FIGURE 9. Itara(Singitara) singularis ♂ calling song: oscillograms showing five echemes (A) andone echeme (B); spectrogram of the same echeme (C); power spectra of a syllable (D) where the red line represents the power [dB] (axis name and scale in red) and the black solid peak represents the relative amplitude (axis name in black).