We describe a new species of the pseudoxyrhophiine snake genus Thamnosophis from a dry forest of the karstic massif Tsingy de Bemaraha in central western Madagascar. Leer más.
Middle Jurassic to Early Cretaceous deposits from northeastern China have yielded varied theropod dinosaurs bearing feathers. Filamentous integumentary structures have also been described in ornithischian dinosaurs, but whether these filaments can be regarded as part of the evolutionary lineage toward feathers remains controversial. Leer más.
 | O domingo 27 de Julho animamos-vos a participar na I Jornada de Herpetología que levaremos a cabo em Terras do Mandeo, com o fim de conhecer e identificar os répteis e amfíbios do entorno. O guía Rafael Vázquez, esperto em herpetofauna ibérica falara-nos de ecología, conservaçom e também das ameaças e tradiçons culturais relacionadas com os hérpetos. A saída partirá no concelho de Coirós na comarca de Betanços, a actividade é livre polo que nom estipulamos hr de remate para que poidades partir quando melhor vos venha. Leer más. |
Alaska wood frogs spend more time freezing and thawing outside than a steak does in your freezer, and the frog comes back to life in the spring in better shape than the steak,» said the lead author on a recent paper demonstrating that freeze tolerance in Alaska wood frogs is more extreme than previously thought Leer más.
 | Guillermo Velo-Antón, Xavier Santos, Iago Sanmartín-Villar, Adolfo Cordero-Rivera, David Buckley. Evolutionary Ecology July 2014. Amphibian reproductive modes are diverse and are characterised by complex adaptations, including vast variability in life history traits and different parental investment strategies. For instance, viviparity is rare in urodeles despite the potential ecological advantages gained in such populations by having semi-independency from water. The fire salamander, Salamandra salamandra, shows remarkable intraspecific variation in reproductive modes, with two strategies co-occurring: a common reproductive mode, larviparity (parturition of aquatic larvae), and a phylogenetically derived reproductive mode, pueriparity (parturition of terrestrial juveniles). Leer más. |
