Guaranisaria llanoi Torres, 1964

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 : 1546-1547

Guaranisaria llanoi Torres, 1964 (Eryngo-cicada)

Flying song

A series of short echemmes resembling ‘snaps’, lasting 0.161 ± 0.035 (0.061 –0.241) seconds, similar to the flying song of C. diardi . Overall, there are 23 ± 3 (16–28) syllables emitted, lasting approximately 0.173 ± 0.042 (0.097 –0.253) seconds. The peak frequency is 7.9 ± 1.4 (5.0–10.1) kHz.

Calling song

Produced when the male lands on a Gravatá ( Eryngium horridum Malme , Apiaceae ) without a female present. This signal can be divided into two parts. The first part of the signal, referred to as ‘part A’, consists of a single echemme lasting 0.035 ± 0.003 (0.031 –0.043) seconds, separated by a brief interval from the next part. The second part of the signal, ‘part B’, is an echeme with a series of syllables, lasting 0.104 ± 0.084 (0.024 –0.238) seconds. It has a peak frequency of 9.3 ± 0.8 (7.8–10.1) kHz, lasting approximately 0.035 ± 0.003 (0.031 –0.043) and 0.104 ± 0.084 (0.024 –0.238) seconds for parts A and B, respectively.

Stress call

A series of long-duration echemmes, but there is no defined rhythm as this signal depends on the organism’s stress level. It comprises about 119.8 ± 43 (86–203) syllables per echemme, lasting 0.666 ± 0.621 (0.22–1.7) seconds. The signal presents frequencies distributed in a broad-range frequency of F1, F2, and F3. F1 is at 6.6 ± 0.35 (6.1–7.1) kHz, F2 at 7.4 ± 0.24 (7.2–7.8) kHz, and F3 at 8.5 ± 0.2 (8.2–8.6) kHz.

Collection site: Parque Natural Municipal Saint-Hilaire. The cicada sings and flies at heights below 1 metre, performing directional flights to its host plant, the Gravatá. Collected and recorded between September and October 2021, between 9 and 11 am, with a temperature of 20°C ( Figures 2D–F and 5B ).

Remarks

Acoustic repertoire previously described by Acosta et al. (2023).

Figures

Figure 2. Songs of Carinetini cicadas. (A) Flying song of Carineta diardi (Guérin-Méneville, 1829). (B) Calling song of Carineta diardi (Guérin-Méneville, 1829). (C) Stress call of Carineta diardi (Guérin- Méneville, 1829). (D) Flying song of Guaranisaria llanoi Torres, 1964. (E) Calling song of Guaranisaria llanoi Torres, 1964. (F) Stress call of Guaranisaria llanoi Torres, 1964.

Figure 5. Visual guide of Pampa cicadas with songs recorderd. (A) Carineta diardi (Guérin-Méneville, 1829). (B) Guaranisaria llanoi Torres, 1964. (C) Parnisa sp. (D) Acanthoventris charrua Ruschel, 2023. (E) Guyalna bonaerensis (Berg, 1879). (F) Guyalna viridifemur (Walker, 1850). (G) Pompanonia sp. (H) Proarna montevidensis Berg, 1882. (I) Proarna uruguayensis Berg, 1882. (J) Quesada gigas (Olivier, 1790). (K) Tympanoterpes sp. (L) Zammara tympanum (Fabricius, 1803). Bar: 1cm. Photos by Riuler Corrêa Acosta.