Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Here we report an unusual record of predation on Enyalioides praestabilis by Imantodes cenchoa. Other genera of small lizards have been recorded as prey for these snakes, but this is the first report for the genus Enyalioides. This report is unusual due to the size and thickness of the prey, which exceeds the thickness of the predator (Imantodes cenchoa). The data were obtained in a forest near San Miguel de Conchay, Morona Santiago province, Ecuador.

Leptophis diplotropis is an endemic species of Mexico with many aspects of its life cycle still unknown. The objective of this work is to contribute to the knowledge about its reproduction through the non-systematic monitoring of a nest observed in a semi-urban environment in the city of Puerto Escondido, Oaxaca. The hatching time of the eggs and the total length of the hatchlings of this species are reported.

We report new toad and frog prey from the Bufonidae and Hylidae families in the diet of the ringed cat-eye snake Leptodeira annulata in the Ecuadorian Amazon. Likewise, we show L. annulata as prey for two species of mammals (one terrestrial and one arboreal). Our observations include records from localities where no cases of predation had previously been reported. Finally, we present the literature review of the diet of L. annulata in the upper Amazon River basin.

We report the first record of the twin-spotted rattlesnake (Crotalus pricei) in the “Golden Triangule” region in Sinaloa. Until now, there was only records in Sonora, Chihuahua, and Durango, but in this work, we confirm the presence of this species in the state.

Panama has 230 species of amphibians, of which 72 (31.4%) are threatened according to national legislation and 19 are endemic. The study area has gallery forests where the samplings were carried out, we registered 15 amphibian species that represent 6.5% of those registered in the country.

Interspecific interactions between vertebrates of different groups are common but also complex and of great importance for community structure. In particular, predation, considered a trophic interaction, plays a significant role in food webs structure and selective effects on prey in natural ecosystems. In this paper we provide new information on the trophic relationship between birds and herpetofauna (reptiles and amphibians) in the complex and biodiverse Usumacinta river basin, through 10 observations recorded between 2012 and 2021. The observations show interactions for feeding purposes of eight bird species, including herons (Tigrisoma mexicanum), jays (Psilorhinus morio), raptors (Caracara cheriway,  Pseudastur albicollis, Harpagus bidentatus, Buteo plagiatus), puffbirds (Malacoptila panamensis), and ducks (Dendrocygna autumnalis), with snakes (Coniophanes quinquevittatus), turtles (Chelydra rossignonii, Trachemys venusta), lizards (Iguana iguana, Sceloporus serrifer), crocodiles (Crocodylus moreletii), and frogs (Smilisca baudinii).  

In this work, we reanalyzed specimens from Paraguay assigned to the species Rhinella icterica from the departments of Canindeyú and Amambay located in the Cerrado ecoregion. Based on the evaluation of external morphological characters, we conclude that they should be assigned to the species Rhinella cerradensis. On the other hand, we consider that there is no evidence that Rhinella icterica is present in the country.

Se presenta una reseña de la vida y obra del Dr. Eric R. Pianka, fallecido en Septiembre de 2022.

 The conservation of the rich Mexican herpetofauna is strongly threatened by anthropization. This has caused alteration in more than half of the country, necessitating an evaluation of the herpetofauna in anthropized environments. This work evaluated the richness and composition of the herpetofauna in differently altered environments of a rural landscape of the Sierra Madre Oriental in San Luis Potosí, Mexico. The hypotheses proposed were that the submontane scrub as a more natural environment would present a greater richness than anthropized environments (urban and agricultural), and that the composition of species would be different between these environments. The sampling design was stratified by habitat, which each contained seven plots were sampled four times during the rainy season of 2015. The completeness of the sampling was calculated, and the richness, diversity and composition were compared. Twelve species were registered during the study, five of which have conservation status or are endemic to Mexico.The environment with highest richness was the submontane scrub, which also contained all the species of conservation concern or endemic to Mexico. The urban environment presented fewer reptile species, but more amphibians, possibly due to the presence of a waterbody. The agricultural environment presented fewer species and individuals. The composition of species was different between environments, although there were important differences between the plots of each environment. These results support the original hypotheses and indicate the need to focus management actions mainly around wetlands and waterbodies, as well as agroecosystems.