Angel I. Contreras Calvario

• Bachelor of Science
• National Polytechnic Institute

The Mexican mud turtle, Kinosternon integrum, is a native Mexican species with a wide distribution. However, despite its abundance, information on its demographics, natural history, and threats is scarce. We report 18 new records of K. integrum in the states of Oaxaca and Puebla. These data highlight threats such as contamination of remaining aquat...

In Mexico opossums are difficult to find, and much of their natural history, ecology, and behavior are unknown. Through photographic and visual records, we obtained data on the presence of two species of marsupials in southern Mexico. We report new municipal records of Derby’s woolly opossum, Caluromys derbianus in Veracruz, and new municipal recor...

We provide new records of Neogale frenata and Potos flavus, two carnivores with elusive behaviors that are challenging to observe in their natural habitats. Through direct records compiled in diurnal and nocturnal monitoring over three years, we record two individuals of N. frenata, a juvenile and an adult, and three individuals of P. flavus, an ad...

Here, we present the first record of Rheohyla miotympanum and Incilius occidentalis in the Municipality of San Miguel del Río, Oaxaca along with a brief description of their habitat. We provide morphological measurements and one call for R. miotympanum.

Claudius angustatus es una especie de tortuga de agua dulce en peligro de extinción. En este trabajo aportamos nuevos registros que amplían 25.1 km su distribución geográfica y aumentan en 209 m el rango altitudinal de la especie. Destacamos el hecho de que la mayoría de estos datos provienen de zonas altamente modificadas por acciones humanas, pri...

New records of Basiliscus vittatus in Oaxaca, Mexico

Distribution notes - Salvadora intermedia in Oaxaca, Mexico

Lepidophyma Duméril, 1851 is the most diverse genus among the nocturnal lizards, with 23 species distributed from the Atlantic and Pacific slopes of Mexico southeast into Panama. Currently, the available information on the ecology and distribution of these species is limited mainly due to their saxicolous habits. Here we present five new state reco...

Ecological observations of Chiropterotriton chiropterus (Caudata: Plethodontidae), an endangered salamander from Mexico

We record Tantilla flavilineata Smith & Burger, 1950, for the first time in the state of Puebla, Mexico. It was previously considered endemic to a small region of the state of Oaxaca. With this record, we extend the known distribution 100 km north-northwestward in a straight line. We also provide scales counts and description of the coloration in l...

The central mountain region of Veracruz is one of the richest areas of herpetofauna in Mexico. The steep topographic gradient of this region is associated with climatic gradients that enable the occurrence of highly diverse herpetofauna communities. We tested differences among habitats to herpetofauna in an urban area, pine forest, oak forest, and...

Predation event involving Tidarren sisyphoides (Walckenaer, 1841) consuming Ninia diademata Baird & Girard, 1853 in Veracruz, Mexico

México es el país con mayor diversidad de víboras de cascabel, con 47 de las 53 especies descritas a nivel mundial, de las cuales 28 son endémicas. Sin embargo, se desconoce la riqueza, abundancia y el estado de conservación del género Crotalus en la Reserva de la Biosfera Mapimí (RBM), particularmente en los estados de Durango y Chihuahua y en un...

Little is known about predators of Rainbow Ameivas, although most are thought to be snakes. In a major re-evaluation of the Holcosus undulatus complex, a number of taxa were elevated to species. Here we summarized documented predators of Rainbow Ameivas, Holcosus undulatus (sensu lato), in Mexico and Central America. This is the first account of pr...

El estudio de la biología reproductiva de las aves permite predecir e identificar especies susceptibles a un mayor riesgo de extinción o llevar a cabo manejo de poblaciones con fines de conservación. Es importante documentar las características de las historias de vida, ya que para muchas especies neotropicales es incompleta. La eufonia garganta am...

Se describe el comportamiento y reproducción en cautiverio de Triprion spinosus, una rana con distribución en México, la cual sus poblaciones disminuyen debido a la perdida de hábitat y al cambio de uso de suelo, se remarca la importancia de la reproducción ex situ como una estrategia para la conservación de las especies.

Se aportan tres nuevos registros de distribución de Ophryacus smaragdinus para la región de las Altas Montañas en el estado de Veracruz, los ejemplares fueron encontrados en bosque mesófilo de montaña en localidades pertenecientes al eje neovolcánico transversal

NEW DISTRIBUTION RECORDS OF FOUR SALAMANDERS SPECIES (CAUDATA: PLETHODONTIDAE) IN THE HIGH MOUNTAIN REGION, VERACRUZ, MEXICO. Fourteen records of four species of the Plethodontidae family (Parvimolge townsendi, Pseudoeurycea firscheini, Thorius pennatulus and Aquiloeurycea cafetalera) are provided, eleven of these are new locations. The set of reco...

CONTRIBUTIONS TO THE KNOWLEDGE OF THE DIET OF Cerrophidion petlalcalensis (Marco Antonio López Luna, Richard C. Vogt, Miguel Ángel De la Torre Loranca, 1999) ) (VIPERIDAE). Abstract.— Novel data about the consumption of reptiles as a part of the diet of Cerrophidion petlalcalensis is provided. Keywords.— Feeding, Montane pitviper, Natural histor...

Numerous direct developing species of the genus Eleutherodactylus native to the Caribbean Islands have been introduced outside its natural range by human activities. The greenhouse frog, Eleutherodactylus planirostris is native to Cuba and the Bahamas and has been introduced to many parts of the world. Here, we report the rediscovery of E. planiros...

Nueva distribucion de Pseudoeurycea nigromaculata

Sibon dimidiatus (Günther, 1872). MEXICO: VERACRUZ: Municipio de Naranjal, Narajal (18°48'01.2"N, 96°57'07.7"W) elev. 660 m; 24 September 2016; Roberto Mora-Gallardo and Angel I. Contreras-Calvario. The individual was found and photographed in a coffee plantation (Coffea arabica) at 0100 h, where the surrounding vegetation consisted of tropical sem...