Pseudogonatodes is a poorly known genus of small bodied, diurnal, ground-dwelling geckos widely distributed in northern South America. No additional species have been described in over two decades.  Leer más.

The mainly Mesoamerican cane toad, Rhinella horribilis, is the northernmost species in the Rhinella marina species group of giant or cane toads, occupying an extensive range west of the Andean Cordillera from Ecuador north to southern Texas. Leer más.

Here we describe a bizarre new plioplatecarpine mosasaurid, Khinjaria acuta, characterized by enlarged, dagger-like anterior teeth, short, robust jaws, and posterior elongation of the skull.  Leer más.

Here, we tested whether the ventral color morphs (yellow, orange and white pure, as well as yellow-orange and white-orange mosaic morphs) of European wall lizards (Podarcis muralis) exhibit differential temporal changes in their reaction to exposure to a novel environment. Leer más.

The study showed that the geographic variation in body size observed in E. calamita has evolved in absence of geographic isolation, with moderate gene flow connecting the populations. Leer más.