Search

We present a description of the external morphology of Phyllomedusa azurea and describe the internal oral morphology of P. azurea and P. oreades from populations of the Brazilian Cerrado. We also present a comparison with the available descriptions of the external morphology of tadpoles from the P. hypochondrialis group and review the internal oral morphology of the Phyllomedusa genus. The tadpole of P. azurea is characterized by a tooth row formula of 2(2)/3(1), few submarginal papillae, and spiracle positioned ventrally. Phyllomedusa oreades has a diamond-shaped buccal floor, numerous pustulations randomly distributed throughout the buccal floor arena, and a triangular buccal roof. The variation observed in the morphology of P. azurea tadpoles highlights the need to understand how morphological variation affects traits used in species diagnosis and the extent to which this variation could be explained by resource use, geographic variation, and/or ontogeny. [ABSTRACT FROM AUTHOR]

Acoustic signals are employed to support the correct designation of species and enables the discrimination between individuals. We analyzed both intra and interindividual variability of the advertisement call ofPhysalaemus centralison the basis of specimens recorded in eight localities of the Cerrado in central Brazil. Within-individual variation, most of the call parameters were static properties. Both spectral and temporal call properties were dynamic between individuals. All call proprieties varied more between individuals than within an individual. Our study adds important data for future studies on the taxonomy and phylogeny of theP. cuviericlade. [ABSTRACT FROM PUBLISHER]

The article offers information on the occurrences of the species Physalaemus lisei. It states that species comprises of 45 described species which are distributed in South America east of the Andes, ranging from southeastern Colombia and southern Venezuela to Uruguay and adjacent Argentina. It further details that Physalaemus lisei are found in southern portion of the Atlantic rainforest to northeastern Rio Grande do Sul and adjacent Santa Catarina states of Brazil.

During the breeding season, hundreds of anurans agglomerate at spawning sites, where a diversity of social contexts arise. In this scenario, anurans may alter their vocal repertoire according to the immediate social context, to overcome intraspecific competition. To evaluate the acoustic response of Boana goiana to successive interactions with a conspecific competitor, the present study was based on comparing the repetition rates of advertisement and aggressive calls of B. goiana focal males exposure to repeated artificial advertisement calls in 10 playback sessions. We observed that B. goiana males altered their acoustic behaviour in response to the simulated arrival of a new competitor. Males emitted less advertisement calls and more aggressive calls with the arrival of the competitors. Temperature and body condition were not important predictors of continuity of males in the experiment or the call repetition rates in the pre-playback session. However, the body condition influenced the total delta advertisement calls (differences in the call rate emission between end and the beginning of the experiment), indicating that higher values of body conditions allow males to show smaller reductions in the emission of advertisement calls over time in the presence of a competitor. [ABSTRACT FROM AUTHOR]