Viriacca viridis Ingrisch 1998
Creators: name: Tan, Ming Kai
name: Muhammad, Amira Aqilah
name: Gorochov, Andrei V.
name: Abdullah, Nurul Ashikin
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Viriacca
Viriacca viridis

description: Viriacca viridis Ingrisch, 1998
(Figs. 9–12)
Viriacca viridis Ingrisch, 1998: 97 — Tan, 2012: 47; Tan, 2017: 70
Specimens examined. PENINSULAR MALAYSIA: Johor State: PFR • 1♀; Lukut Trail; N1.81518, E103.87832, 125.2± 7.3 m.a.s.l.; 18 August 2023, 20h22; under the foliage of a small tree; coll. M. K. Tan, Amira A. Muhammad & N. Ashikin Abdullah; PANTI.23.34 (MZUM) • 1♁; Lukut Trail; N1.81535, E103.87824, 129.5± 7.5 m.a.s.l.; 18 August 2023, 20h31; on the foliage of a small tree; coll. M. K. Tan, Amira A. Muhammad & N. Ashikin Abdullah; PANTI.23.36 (ZRC) • 1♁; Lukut Trail; N1.81549, E103.87816, 133.6± 6.7 m.a.s.l.; 18 August 2023, 20h45; feeding on the foliage of a small tree; coll. M. K. Tan, Amira A. Muhammad & N. Ashikin Abdullah; PANTI.23.38 (ZRC) • 1♀; Lukut Trail; N1.81612, E103.87822, 152.6± 6.6 m.a.s.l.; 18 August 2023, 21h09; on the branch near the ground; coll. M. K. Tan, Amira A. Muhammad & N. Ashikin Abdullah; PANTI.23.42 (MZUM) • 1♀; Sisek Trail; N1.82692, E103.83286, 91.8± 6.7 m.a.s.l.; 19 August 2023, 21h17; under the foliage of a small tree; coll. M. K. Tan, Amira A. Muhammad & N. Ashikin Abdullah; PANTI.23.55 (ZRC)
Remarks. Material from PFR represents a new locality record after Singapore, Negeri Sembilan, Selangor and Pahang (Ingrisch, 1998; Tan, 2012, 2017).
Ecology. In Singapore, this species is limited mainly to the freshwater swamp forest. But in PFR, this species can be found more commonly in secondary forest.
Type locality. PENINSULAR MALAYSIA: Negeri Sembilan State: Pasoh Forest Reserve
Distribution. PENINSULAR MALAYSIA (Johor State: PFR [new]; Negeri Sembilan State: Pasoh Forest Reserve; Selangor State: Templer Park; Pahang State: Krau Wildlife Reserve); SINGAPORE
Calling song (2♁, 30.4°C) (Fig. 12). The calling song consists of echemes that can vary in duration (1.1–20.9 s) and sometimes extend to become a continuous trill. A short echeme, on average, has a duration of 3.4 s. Each echeme commences with syllables with increasing amplitudes until a maximum. At times, the echeme is truncated by short pause. The syllable duration is 19.4±0.9 ms (17.6–21.7 ms) and the interval between consecutive syllables is 12.8±1.1 ms (10.4–15.7 ms). The syllable repetition rate is 31±1 syllables s−1 (29–33 syllables s−1). The call spectrum is broad-based and has a peak frequency of 26.4±1.1 kHz (24.5–28.8 kHz).
The calling song of Viriacca viridis has a similar structure (i.e., echemes that can become continuous trills) as those of Viriacca insularis Gorochov, 2011 from Pulau Tioman (Pahang) and Viriacca modesta Gorochov, 2013 from Borneo (Tan et al., 2023). The call spectrum does not differ, ranging from 21.5–28.8 kHz. However, the syllable repetition rate is slightly lower than that of V. modesta (average 34 syllables s−1) and higher than that of V. insularis (average 22 syllables s−1).
description: Published as part of Tan, Ming Kai, Muhammad, Amira Aqilah, Gorochov, Andrei V. & Abdullah, Nurul Ashikin, 2024, An account on some katydids (Orthoptera: Tettigonioidea) from Panti Forest Reserve in Johor, Peninsular Malaysia, pp. 117-143 in Zootaxa 5415 (1) on pages 126-129, DOI: 10.11646/zootaxa.5415.1.5, http://zenodo.org/record/10692701