Proarna montevidensis Berg, 1882

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 : 1551-1552

Proarna montevidensis Berg, 1882

Flying song

Not observed.

Calling song

Composed of a continuous emission signal with a series of syllables, each consisting of 2 notes. Each note lasts about 0.007 ± 0.001 (0.004 –0.008), and 125.1 ± 28.3 (75–154) phrases are emitted per second. Also, in broad-range frequency, with F1 at 9.52 ± 0.09 (9.4–9.6), F2 at 10.57 ± 0.12 (10.4–10.7), and F3 at 11.57 ± 0.15 (11.4–11.7) kHz.

Stress call

The species did not emit an audible signal during capture, only the beating of its wings. Collection site: Santa Vitória do Palmar, near the Departamento Nacional de Obras de Saneamento ( DNOS) . The cicada was collected and recorded at stream edges in this region. It was recorded and collected on 26 December 2021, at 11 am, with temperatures ranging between 23 and 24°C, between 0.2 and 0.6 metres above the ground ( Figures 3I and 5H ).

Remarks

This is the first official sound record publication for the species and an official occurrence record for the country. There is a confusion regarding the occurrence of this species in Brazil. Berg described the species with locality Montevideo and collected by Sellow ( Berg 1882). The distribution of P. montevidensis is listed as Argentina, Uruguay and Brazil by Sanborn and Heath (2014) and Sanborn (2024) where they use several publications to define the distribution ( Torres 1961; Metcalf 1963; Duffels and Van Der Laan 1985; de Santis 2007; Sanborn and Heath 2014; Nunes et al. 2023). However, the only one of these references that mentioned Brazil is Torres (1961). The author wrote about having access to the type specimen and found a label with the data ‘ Brasil, Sello’ (sic). Indeed, this label is present together with the type specimen, as shown by photographs we had access to made available by the Museum für Naturkunde Berlin. However, Brazil was not mentioned by Berg in the description of the species. Torres (1961) claimed that this was a mistake and the label was added posteriorly. As no publication includes Brazil as a location of occurrence, we consider the record in this publication the first official one of P. montevidensis in Brazil.

Figures

Figure 3. Songs of Parnisini and Fidicinini cicadas. (A) Calling song of Parnisa sp. (B) Stress call of Parnisa sp. (C) Acanthoventris charrua Ruschel, 2023. (D) Guyalna bonaerensis (Berg, 1879). (E) Calling song of Guyalna viridifemur (Walker, 1850). (F) Stress call of Guyalna viridifemur (Walker, 1850). (G) Calling song of Pompanonia sp. (H) Stress call of Pompanonia sp. (I) Calling song of Proarna montevidensis.BERG, 1882. (J) Calling song of Proarna uruguayensis Berg, 1882

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.