Lithoxenus miramae (Veltishchev, 1940)

Korsunovskaya, Olga, 2024, Drymadusini katydids (Orthoptera: Tettigoniidae; Tettigoniinae): intraspecific variability-morphs or subspecies?, Zootaxa 5403 (1), pp. 42-50 : 49

L. miramae

Using high-frequency acoustic equipment, we were able to record for the first time the calling song ( Fig. 3D, E, F ) and obtain a microphotograph of the stridulatory file of one male ( Fig. 3I ). Calling songs are long (1.5–2 s) echemes of 20–35 syllables repeated approximately every one second. The closing syllable duration at 22 oC is on average 27.6 ms (SD=1.3 ms). Sometimes opening syllables lasting 7–12 ms are visible before them. The syllable repetition rate in the echemes is 19 s-1 (SD= 1 s-1).

The frequency spectrum of the calling song ( Fig. 3F ) is located in the range of 12–45 kHz, the dominant frequencies form two maxima—near 18 and 25 kHz.

The stridulatory file of the holotype is shown in Fig. 2L . This file of the studied male from Uzbekistan consists of 57 evenly spaced teeth ( Fig. 3I ) .

Figures

FIGURE 2. Habitus and details of body structure of Lithoxenus katydids. A—habitus of the male of L. h. heptapotamicus (holotype); B—pronotum of L. h. heptapotamicus (holotype), lateral view; C—male supra-anal plate and cerci of L. h. heptapotamicus (holotype), dorsal view; D—habitus of the male of L. h. minutus (holotype), lateral view; E—male supraanal plate and cerci of L. h. minutus (holotype), dorsal view; F—titillator of L. h. minutus (holotype); G—same of L. h. heptapotamicus (holotype); H—habitus of the female of L. h. minutus (paratype), lateral view; I—female subgenital plate of L. h. minutus (paratype). J—habitus of the male of L. miramae (Uzbekistan); K—habitus of the male of L. miramae (holotype), lateral viev; L—male stridulatory file (left tegmen) of L. miramae (holotype); M—male supra-anal plate and cerci of L. miramae (holotype), dorsal view; N—same of L. miramae (Uzbekistan); O—titillators of L. miramae (holoptype); P—same of males from Uzbekistan. Scale 5 mm (A, B, D, H, J, K), 1 mm (C, E–G, I), 500 µ (O, P).

FIGURE 3. Temporal pattern, frequency spectra of male calling songs and stridulatory files of E. mongolicus and L. miramae. A, B—oscillograms of calling song of E. mongolicus f. caeruleum; C—frequency spectrum of calling song of E. mongolicus f. caeruleum; D, E—oscillograms of calling song of L. miramae; F—frequency spectrum of calling song of L. miramae; G—stridulatory file of E. mongolicus (Mongolia); H—same of E. mongolicus f. caeruleum (Tuva); I—same of L. miramae (Uzbekistan). B, E—oscillograms at higher speed. Spectra are in linear scale. Scale bar: A, C—500 ms, B, D—50 ms; G—I— 500 µ. The temperature when recording sounds is given.