Advertisement Call ofSphaenorhynchus mirimCaramaschi, Almeida and Gasparini, 2009, (Anura: Hylidae)

Abstract

Anuran vocalization is species-specific and bioacoustic analyses are important tools for species delimitation. The present study describes the vocalization of Sphaenorhynchus mirim, recognizing two different types of call, here referred to as call type A and call type B. We analyzed a total of 86 calls of type A and 15 calls of type B. Call type A consists of a single multipulsed note with duration of 34.12-101.00 ms, with 9-25 pulses/note, pulse rate ranges from 240.40-338.21 pulses/sec and the dominant frequency is between 3085.51-3398.86 Hz. We arbitrarily subdivided the type B call into two patterns: Bd (with well-defined notes) and Bnd (with non-defined notes). Call type B with well-defined notes (n = 4) has 3-5 multipulsed notes, duration of 180.12-262.68 ms, note duration of 15.62-100.75 ms, interval between notes with 7.93-23.12 ms, 2-22 pulses/note and dominant frequency of 3067.77-3180.11 Hz. Call type B with non-defined notes (n = 11) has duration of 143.75-218.12 ms; 26-32 pulses/ call and a dominant frequency of 3180.11-3375.22 Hz. Sphaenorhynchus mirim vocalization differs from all other species in the genus by its higher dominant frequency.

A new species of Hatchet-faced Treefrog Sphaenorhynchus Tschudi (Anura: Hylidae) from Quadrilátero Ferrífero, Minas Gerais, southeastern Brazil

“…The advertisement call of Sphaenorhynchus canga sp. nov. further differentiates it from that of S. caramaschii (call duration of 5.23-11.0 s, 22-43 notes/call, and note duration of 0.037-0.07 s; Toledo et al 2007;Toledo et al 2014) by its shorter duration, lower number of notes/call, and shorter note duration (call duration of 0.008-1.23 s, 1-9 notes/call, and note duration of 0.005-0.020 s); S. mirim (9-25 pulses/note; Lacerda et al 2011) by its lower number of pulses/note (1-5 pulses/note); S. pauloalvini and S. prasinus (interval between notes of 0.01-0.02 s in S. pauloalvini, and 0.014-0.018 s in S. prasinus; Toledo et al 2014) by its larger interval between notes (0.05-0.23 s); and S. planicola (note duration of 0.08-0.17 s, and interval between notes of 0.24 s; Toledo et al 2014) by its shorter note duration and shorter interval between notes (note duration of 0.005-0.020 s, and interval between notes of 0.05-0.23 s).…”