Carmo, L. F., I. R. Dias, G. Tanajura, O. Rojas-Padilla, M. Solé & C. V. Mira-Mendes

Revisiting the bioacoustics of Sphaenorhynchus prasinus (Anura: Hylidae): new data on vocalization of a lime treefrog from northeastern Brazil, including topotypes. pp. 53-58.

Abstract. Bioacoustic traits are among the most widely used behavioral characters for species delimitation in anurans. Here, we present a redescription of the advertisement call of Sphaenorhynchus prasinus, based on specimens collected in the state of Bahia, some of which very close to its type locality. We compare our data with previous descriptions and with vocalizations of congeneric species. A total of 86 calls (412 notes) from four calling males were analyzed. We identified a single call type, herein referred to as advertisement call, composed of multi-pulsed notes emitted at regular intervals. These calls usually exhibited an amplitude peak near the end of their  call, which ranged from 0.1 to 0.8 s, followed by inter-call intervals of 1.2 to 199.3 s. Each call consisted of 4 to 21 notes, with inter-note intervals of 0.01–0.04 s and a note repetition rate of 27.3–42.8 notes per second. The dominant frequency ranged from 1875.0 to 2670.1 Hz. We also provide additional acoustic parameters not reported in the original call description. This study contributes to the acoustic characterization and taxonomic understanding of the species.

Key words. Amphibia, Sphaenorhynchini, advertisement call, calling behavior, mating activity, systematics, taxonomy, Atlantic Forest.