Cuadernos de Herpetología

Allobates brunneus (Cope, 1887) (Anura, Aromobatidae): significant distribution extension for a formerly critically endangered species from the Brazilian Cerrado

Beatriz Natália Pietro-Biasi — 2024-12-19

Novo registro de Copeoglossum nigropunctatum (Spix, 1825) (Squamata, Scincidae) em Brejo de Altitude no Domínio Morfoclimático da Caatinga, nordeste do Brasil

Leonardo Barros Ribeiro — 2025-01-21

Un nuevo registro de Oxyrhopus petolarius (Linnaeus, 1758) en el Chaco Paraguayo

Viviana Espinola — 2025-02-25

Primer registro de nidificación de Caiman latirostris (DAUDÍN, 1802) en Gualeguaychú – Provincia de Entre Ríos

Gerardo Gabriel Vega — 2025-05-12

Registro y primer voucher fotográfico de un lagarto enigmático: Urostrophus longicauda (Boulenger, 1891) en el Parque Nacional Iberá, Corrientes, Argentina

Alfredo Sabaliauskas — 2025-05-29

A second record of Acanthochelys pallidipectoris (Freiberg, 1945) in the Humid Chaco of Paraguay

J. Richard Vetter — 2025-05-30

First report of the interaction between the toad Melanophryniscus nigricans and the leech Helobdella cordobensis in the Tandilia Mountains

Facundo Tejedor — 2025-05-09

Melanophryniscus nigricans is an endangered endemic anuran species restricted to the Tandilia Mountains in Argentina. We report for the first time the interaction between this toad species and the leech Helobdella cordobensis. We observed the interaction in a temporary pond at the “Sierra del Tigre” Natural Reserve during a breeding event of M. nigricans on February 7th, 2024. A leech was found attached to the belly of a toad and removed manually with no evidence of injury in the amphibian, suggesting a case of phoresis instead of parasitism. This report is also the first documented phoretic interaction between H. cordobensis and anurans from Argentina.

Interacciones predador presa de Phymaturus palluma (Squamata: Liolaemidae) con Agriornis montanus (Aves: Tyrannidae) y Upucerthia dumetaria (Aves: Furnariidae)

Diego Ferrer — 2025-05-30

Predator-prey interactions are difficult to observe in nature, requiring time and systematicsurveys to obtain results that can be documented. Photographic records are a tool that provides valuable information on species behavior in certain situations. This paper details the response of the lizard Phymaturus palluma to the presence of two birds from the genera Agriornis and High mountain lizard; Behavior; Black-billed Shrike-Tyrant; Scale-throated Earthcreeper;
Mendoza.Upuchertia, which suggest antipredatory behaviors by the reptile.

Thanatosis in the Gold-striped Frog Lithodytes lineatus (Anura: Leptodactylidae) in the tropical dry forest of northeastern Colombia

Giovany Díaz — 2025-05-12

Predation forces prey to develop multiple forms of evasion, including thanatosis, as a behavior that leads to the adoption of a posture where the animal appears to be dead. In this study we report for the first time thanatosis as a strategy present in the genus Lithodytes and the species L. lineatus, adding one more behavior to a list that includes Batesian mimicry, Müllerian mimicry, deimatic behavior and chemical mimicry.

Limbs interweaving for Neotropical anurans

Isabel Gonzalves Velasco — 2025-05-21

Anurans have developed a variety of antipredator behaviors, including aposematism, posturing, and leg interweaving, to enhance survival against predators. Leg interweaving, observed in species like Dendropsophus branneri and D. oliverai, involves crossing limbs and may serve as a displaced behavior rather than a true defense. Unlike species with bright aposematic colors, these frogs rely primarily on camouflage for protection. The variability and limited documentation of leg interweaving highlight the need for further experimental research to clarify its function and significance, contributing to a deeper understanding of the adaptive strategies employed by anurans under predation pressure.

A new addition to the frog fauna of Uruguay, Physalaemus cristinae Cardozo et al., 2023 (Anura, Leptodactylidae)

Gabriel Rodriguez de Almeida — 2025-05-29

We present the first finding in Uruguay of the recently described frog Physalaemus cristinae. Adult specimens were collected in two localities of north-western Uruguay, on the east bank of the Uruguay River: near the city of Bella Unión associated to temporal ponds of an agricultural area; and in an urban area within the city of Salto. The advertisement call consisted of a single and non-pulsed note, characteristic of P. cristinae. In addition, partial sequences of the cytochrome b gene confirmed the species identity. We consider that the presence of P. cristinae in north-western Uruguay, previously unregistered in a well sampled area, is due to recent cross-river dispersal from populations in the Provinces of Entre Ríos and Corrientes, Argentina, on the west bank of the Uruguay River.

Stretched up in a tree a knot down in our hands: first record of climbing and defensive habits of Trilepida salgueiroi (Amaral, 1955) (Serpentes, Leptotyphlopidae)

Miguel R. Ugalde — 2025-05-30

Threadsnakes are typical burrowers with specialised diet in social insects. Climbing behaviour has been observed for some of these species although there is no consensus about the nature of such behaviour for fossorial species. In this study we describe the first climbing behaviour for Trilepida salgueiroi in an occasional observation together with the description of the sequence of defensive behaviours displayed during its capture.

The advertisement call of Dendropsophus soaresi (Amphibia, Anura, Hylidae) from the type locality and other sites in the State of Piauí, Northeastern Brazil

Ulisses Caramaschi — 2025-05-19

Many species identification issues can be minimized by providing descriptions of the advertisement calls from specimens in the type locality. In this paper, we detail the advertisement call of Dendropsophus soaresi from six localities in the State of Piauí, Northeastern Brazil, including the type locality (Picos, PI), and expand the known distribution of the species within the state. The previous mating call description attributed to D. soaresi was based on specimens from Mambaí, State of Goiás, approximately 960 km from its type locality. We present a comparative analysis of the advertisement calls of species within the Dendropsophus marmoratus Group.

Nemátodos parásitos en reptiles de Argentina: una actualización tras 5 años de investigación

Gabriel N. Castillo — 2025-05-21

The objective of this study was to update the state of knowledge on reptile nematodes in Argentina, five years after the last review. Following the 2020 review on parasitic nematodes in reptiles, we provide an updated taxonomic and systematic list of nematodes parasitizing reptiles in Argentina. A total of 40 nematode taxa, belonging to 2 orders, 5 suborders, 12 families and 19 genera, were found to parasitize 54 reptile species across 11 families. These included 44 species of lizards, 5 turtles and 5 snakes. Among the parasites, nematodes of the families Pharyngodonidae and Physalopteridae were the most prevalent with 13 and 7 recorded taxa, respectively. Regarding hosts, the family Liolaemidae had the highest number of examined species (n= 28), followed by Teiidae (n= 4). Compared to 2020 review, this study adds 16 new species of parasitic nematodes and 14 new host species, making a significant advancement in parasitological research in Argentina. This updated information will be valuable for developing plans and projects related to the ecology and conservation of reptiles in Argentina.