Pteroplistes lagrecai Gorochov, 2004

Tan, Ming Kai, Gorochov, Andrei, Japir, Razy, Chung, Arthur Y. C. & Robillard, Tony, 2024, New species of little-known crickets from the subfamily Pteroplistinae (Orthoptera, Grylloidea) from Sabah and contribution to their bioacoustics, Zootaxa 5506 (2), pp. 205-226 : 223-224

Pteroplistes lagrecai Gorochov, 2004

( Figs 2B , 3B , 4B , 15B )

Pteroplistes lagrecai Gorochov, 2004: 382 — Gorochov, 2022: 447

Material examined. EAST MALAYSIA: • ♂; Sabah State, Sandakan District, Sepilok, Rainforest Discovery Centre , dipterocarp forest; N05.87395, E117.93871, 54m; 18.v.2022, night (19h); on tree trunk; T. Robillard & M.K. Tan leg.; TR22-27, call recording video 0062; MNHN-EO1288 .

Ecology. This species was found calling on a tree trunk at night, where two females were located near it.

Distribution. EAST MALAYSIA: Sabah: Sepilok.

Calling song ( Figs 2D , 3D , 4D ). Consists of an echeme-sequence. At 26°C, each echeme-sequence consists two parts, the first being 6±2 (5–10) isolated syllables, followed by the second being 11±4 (5–16) echemes made up of two syllables (doublet) each. For the first part, the average syllable duration is 22.1±1.5 ms (19.6–25.2 ms) and the average interval between consecutive syllables is 0.14± 0.03 s (0.12– 0.20 s). For the second part, the average echeme duration is 58.8±1.8 ms (57.5–64.1 ms) and the average silent interval between consecutive echemes is the same as the average silent interval between consecutive syllables in the first part of the song. The average syllable duration of the doublet is 22.4±0.5 ms (21.5–23.2 ms), barely longer than that in the first part; and the average silent interval between the two syllables is 13.1±0.7 ms (11.8–14.1 ms). The frequency spectrum is pure-tonal and forms an harmonic series, with the energy peaking at a dominant fundamental frequency of 7.39 kHz.

Figures

FIGURE 2. Power spectra of the calling songs of the pteroplistine cricket species: Tembelingiola biaculeata sp. nov. (A), Tembelingiola kabili sp. nov. (B), Pteroplistes silam sp. nov. (C), Pteroplistes lagrecai Gorochov, 2004 (D) and Singapuriola separata Gorochov & Tan, 2012 (E). The grey line represents the power [dB] (axis name and scale in grey) and the black solid peak represents the relative amplitude (axis name in black).

FIGURE 3. Oscillograms of the calling songs of the pteroplistine cricket species: three echemes with different lengths of Tembelingiola biaculeata sp. nov. (A), two echeme-sequencesof Tembelingiola kabili sp. nov. (B), continuous trill of Pteroplistes silam sp. nov. (C), an echeme-sequence of Pteroplistes lagrecai Gorochov, 2004 (D) and three echemes of Singapuriola separata Gorochov & Tan, 2012 (E). Scale bar: 1 s.

FIGURE 4. Oscillograms of the syllables of the pteroplistine cricket species: Tembelingiola biaculeata sp. nov. (A), Tembelingiola kabili sp. nov. (B), Pteroplistes silam sp. nov. (C), Pteroplistes lagrecai Gorochov, 2004 (D) and Singapuriola separata Gorochov & Tan, 2012 (E). Scale bar: 0.05 s.

FIGURE 15. Pteroplistes silam sp. nov. calling on the tree trunk in Mount Silam (A), and Pteroplistes lagrecai Gorochov, 2004 calling on the tree in Sepilok (B).