摘要：We describe and compare the spectral and temporal characteristics of the advertisement calls of
six species of the Hyla albosignata group (H. albosignata, H. callipygia, H. cavicola, H. ibirapitanga, H.
leucopygia, and H. sibilata), and relate the ecological and morphological relationships among these species
based on the phenetic analysis resulted from the acoustic parameters. Advertisement calls of species of the
H. albosignata species group are quite similar, each consisting of one repeated note containing harmonic
structure. Duration of calls range from about 0.1s (H. sibilata) to 0.5s (H. cavicola) and are repeated at
different rates, from three calls per second (H. sibilata) to one call for each three seconds (H. callipygia). The
main difference among the advertisement calls is related to their spectral properties. The arrangement of the
phenetic tree does not corroborate the division proposed in the literature based on morphological differences
of the cloacal region, nor is related to species body size. Sympatric species with similar calls are not syntopic,
and syntopic species show more differentiated calls.
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