FIGURE 4 in Phylogenetic position, morphological data, call, and geographic distribution of the elusive treefrog Ololygon skuki (Hylidae: Hylinae: Scinaxini)

FIGURE 4. Vocalization of Ololygon skuki (MHNUFAL-SOM 001; unvouchered specimen). (A) Oscillogram (above) and spectrogram (below) of one call. (B) Oscillogram (above) and spectrogram (below) of two notes in the red brackets of (A). (C) Expanded oscillogram of the first note of (B).