Advertisement call of two threatened red-bellied-toads Melanophryniscus cambaraensis and M. macrogranulosus (Anura: Bufonidae), from the Atlantic Rainforest, southern Brazil Author Caorsi, Valentina Author Bordignon, Debora Wolff Author Márquez, Rafael Author Martins, Márcio Borges- text Zootaxa 2020 2020-12-09 4894 2 206 220 journal article 9310 10.11646/zootaxa.4894.2.2 5db7a582-d943-4ebf-9f5d-da2be9b17f84 1175-5326 4315653 E17AA00A-D7B2-4FAE-B4D4-93DC279CE906 Melanophryniscus cambaraensis We collected acoustic data of male calls in three different sample sites in Rio Grande do Sul , Brazil ( Figure 1 ). We recorded Melanophryniscus cambaraensis during day and night on September 18 and 19 of 2012 in Floresta Nacional de São Francisco de Paula – FLONA SFP – a conservation unit ( 29°25’41.3”S , 50°23’44.5”W / 866 m asl) located in the municipality of São Francisco de Paula . The advertisement call of Melanophryniscus cambaraensis from FLONA SFP has an average duration of 18.8 seconds (SD = 6.51) and it is composed of segments A and B ( Figure 3 A–B). Part A is composed of 3–11 single modulated notes, each one composed of one pulse (of 0.02 seconds each), separated by long time intervals of 0.38 seconds (SD = 0.052). Call part B is an extremely long train of unmodulated pulses emitted at a rate of 35.8 pulses per second (SD = 3.1), with short time intervals (Mean = 0.02; SD = 0.002), and lasting from 9–32.2 seconds (Mean = 16.6; SD = 6.8) ( Table 1 ). Peak frequency of both parts is quite similar being on average 2.2 kHz in part A (SD = 0.16) and 2.2 kHz in part B (SD = 0.17) ( Table 1 ).