Xyleus discoideus discoideus (Serville, 1831)

Acosta, Riuler C., Timm, Vítor F., Zefa, Edison, da Costa, Maria K. M., Ruschel, Tatiana P., Lopes, Dimitrius A. R. & Kaminski, Lucas A., 2025, Pampa singers: an acoustic and visual guide to singing insects (Orthoptera and Hemiptera), Journal of Natural History 59 (21 - 24), pp. 1541-1589 : 1559

Xyleus discoideus discoideus (Serville, 1831)

Calling song

Composed of a long echemme. This echeme lasts for 1.198 ± 0.100 (1.128 –1.313) seconds, containing 68 ± 9.84 (60–79) syllables. The peak frequency is 14.21 ± 1.3 (13.125 –16.687) kHz, with a bandwidth of 13.02 ± 0.33 (12.75–13.687) kHz.

Courtship song

Composed of a sequence of echemmes. Each of these echemmes lasts for 0.195 ± 0.017 (0.168 –0.230) seconds, with 8.833 ± 2.316 (7–13) syllables at intervals of 0.168 ± 0.025 (0.136 –0.213) seconds. The peak frequency is 12.575 ± 1.230 (11.283 –13.867) kHz, and the bandwidth is 10.421 ± 0.560 (9.733–11.8) kHz.

Alert song

Not recorded.

Collection sites: Santa Vitória do Palmar, Rio Grande and Porto Alegre. Individuals produce signals in shrubs between 0.1 and 0.5 metres above the ground between 11 am and 3 pm. Males were recorded and collected during March 2021, at 3 pm, at a temperature of 21°C ( Figures 6E–F and 7C ).

Remarks

The calling song was previously described by Riede (1987).

Figures

Figure 6. Song of grasshoppers. (A). Calling song of Eutryxalis filata (Walker, 1870). (B). Calling song of Euplectrotettix schulzi Bruner, 1900. (C). Alert song of Euplectrotettix schulzi Bruner, 1900. (D). Calling song of Sinipta dalmani (Stål, 1861). (E) Calling song of Xyleus discoideus discoideus (Serville, 1831). (F) Courtship song of Xyleus discoideus discoideus (Serville, 1831). (G) Calling song of Chromacris speciosa (Thunberg, 1824).

Figure 7. Visual guide of Pampa grasshoppers with songs recorded. (A) Eutryxalis filata (Walker, 1870). (B) Euplectrotettix ferrugineus Brunner, 1900. (C) Xyleus discoideus discoideus (Serville, 1831). (D) Chromacris speciosa (Thunberg, 1824). Bar: 1cm. Photos by Riuler Corrêa Acosta.