The advertisement call of Dendropsophus pseudomeridianus (Cruz, Caramaschi & Dias) (Anura: Hylidae).

The advertisement call plays a fundamental role in anuran reproduction (Duellman & Trueb 1994; Wells 2007). Some species that may be confused morphologically with each other can be distinguished by vocalization (Pombal et al. 1995). It is the case of Dendropsophus pseudomeridianus, which is phenotypically very similar to D. berthalutzae (Bokermann), D. branneri (Cochran), D. decipiens (Lutz), D. haddadi (Pombal & Bastos), D. meridianus (Lutz) and D. oliveirai (Bokermann). Herein, we present the first quantitative description of the advertisement call of D. pseudomeridianus and compare it with the advertisement call of morphologically similar species of the D. microcephalus group. We analyzed 183 calls of three individuals from the Reserva Particular de Patrimônio Natural Campo Escoteiro Geraldo Hugo Nunes in the municipality of Guapimirim, State of Rio de Janeiro (22° 34’ 37” S and 43° 01’ 50” W, 23 m a.s.l.), at approximately 70 km from the type locality. The recordings were made at a sampling rate of 44.1 kHz and 24 bits using a Tascam DR-07 digital recorder and a Sennheiser ME67 microphone, at an air temperature of 25°C. The analyses were performed using the program Raven Pro 1.4 from The Cornell Lab of Ornitology (Bioacustic Research Program 2011). Technical terms and definitions follow Littlejohn (2001). Numerical call parameters are given as range followed by mean ( ) ± standard deviation (SD), mode (Mo) and number of samples (n). Voucher specimens are