FIGURE 6 in A new species of Allobates (Anura: Aromobatidae) from the Tapajós River basin, Pará State, Brazil

FIGURE 6. Oscillograms (upper graphs) and sonograms (lower graphs) of advertisement calls of Allobates magnussoni recorded at the species type locality in Parque Nacional da Amazônia, Itaituba, Pará State, Brazil. (A) Ten seconds of regular continuous advertisement calls of a male (INPA-H 32968, SVL = 18.4 mm) recorded at 24.4 °C. Notes are split by short and regular silent intervals. (B) Detailed view of two notes from the same call session, illustrating the slight ascending frequency modulation. (C) Advertisement calls of a second male (INPA-H 32964, SVL =17.0 mm), recorded at type locality at 23.9 °C, while emitting calls with an alternative arrangement, with notes grouped in pairs. (D) Detailed view of the same call session demonstrating that the first note of each pair is longer and has a wider frequency bandwidth than the second note.