Varitrella (Cantotrella) bakeri (Chopard, 1925)

(Figs 13–16)

Madasumma bakeri Chopard, 1925: 322

Varitrella bakeri — Gorochov, 2003: 279 (new combination and drawings of genitalia, but holotype not examined); Gorochov, 2006: 33 (placed in subgenus Cantotrella)

Specimen examined. Holotype: PHILIPPINES • ♁; Mindanao, Surigao; coll. C.F. Baker; MNHN-EO-ENSIF6696

New specimens examined. PHILIPPINES •1♁; Mindanao, Misamis Oriental, Gingoog City, Barangay Lunotan, foot of Mt Balatukan; N8.70485, E125.00648, 1193.0±5.3 m.a.s.l.; 15 February 2023, 09h26; on a shrub; coll. J. Lapay; MIN.23.44 (ZRC) (Figs 13, 14) • 1♁; Mindanao, Misamis Oriental, Gingoog City, Barangay Kalagunoy, foot of Mt Balatukan; N8.73898, E125.03278, 1050 m.a.s.l.; 29 April 2023, 20h00; open area outside the mossy forest, on a fern foliage; coll. A.M. Sabang & D.C.M. Bahoy; specimen damaged but genitalia preserved (MSUIIT)

Remarks. The male specimens which we collected from Mt Balatukan resemble the holotype of V. bakeri (MNHN-EO-ENSIF6696) and V. bakeri sensu Gorochov (2003) from Mindanao Island in the ectophallic fold [rachis (= guiding rod)] in profile view, which is characteristic of the species and differentiate it from a similar-looking congener, i.e., Varitrella (Cantotrella) saussurei (Stål, 1877) from northern Philippines (i.e., Babuyan Islands) (Figs 14, 15). The male specimens from Mt Balatukan also have identical subgenital plate as the male examined by Gorochov (2003) [ V. bakeri sensu Gorochov (2003)]. The male FWs of our specimens nonetheless differs from the holotype by the presence of a distinct white spot (vaguely present in the holotype).

Ecology. Unknown.

Type locality. PHILIPPINES, Mindanao Island, Surigao City

Distribution. PHILIPPINES (Mindanao Island: Surigao City in Surigao del Norte, Gingoog City in Misamis Oriental)

Calling song (1J, 21.1±0.5°C) (Fig. 16). The calling song consists of an echeme made up of 18±1 syllables (13–20 syllables) and has an average duration of 3.48±0.27 s (2.53–4.04 s). Each syllable has an average duration of 33.11±1.50 ms (29.30–36.80 ms). The average interval between consecutive syllables is 172.6±4.1 ms (164.2–183.7 ms). The frequency spectrum is pure-tonal and forms a harmonic, with the energy peaking at the fundamental frequency. The dominant frequency is 4.99±0.11 kHz (4.78–5.16 kHz).