Chromacris speciosa (Thunberg, 1824)

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 : 1559-1560

Chromacris speciosa (Thunberg, 1824)

Calling song

A series of echemmes. Each echeme lasts for 0.367 ± 0.033 (0.343 –0.417) seconds, containing 7.25 ± 0.5 (7–8) syllables. There is an interval between each echemme of 1.401 ± 0.173 (1.202 –1.521) seconds. The peak frequency is 11.62 ± 0.243 (11.4–11.8) kHz, and the bandwidth is 9.969 ± 0.293 (9.56–10.249) kHz.

Alert song

Not recorded.

Collection sites

Santa Vitória do Palmar, Rio Grande, Porto Alegre and the Parque Estadual de Itapuã. Males were recorded and collected in shrubs in open regions between December 2021 and January 2022. The individual was positioned 1.5 metres above the ground at 5 pm, at a temperature of 20°C ( Figures 6G and 7D ).

Remarks

This is the first official publication of the species’ sound record.

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.