Batrachochytrium dendrobatidis (Bd), is a chytrid fungus that causes the infectious disease chytridiomycosis in amphibians. The infection is considered to be a panzootic with cases reported in more than 50 countries worldwide. Infection by the fungus has led to catastrophic population and amphibian community declines on four continents, and is responsible for several amphibian species extinctions. Leer más.
A partir de los análisis genéticos realizados con muestras de Psammophis schokari a lo largo de su distribución conocida se ha indicado que forman un grupo monofilético integrado por cuatro linajes (Marruecos y Sahara Occidental, Mauritania, Israel y Argelia) siendo los clados más distantes genéticamente el de Marruecos y Sahara Occidental con el de Argelia (Rato et al., 2007). Leer más.
Many fossil animals bear traits such as crests or horns that probably functioned as sexually selected signals or weapons. Interpretations of these structures as functioning in mate choice or intrasexual contests are often controversial, with interpretations based on biomechanics or physiology being favoured by many. Leer más.
The Oxford Clay Formation of England has yielded numerous sympatric species of metriorhynchid crocodylomorphs, although disagreement has persisted regarding the number of valid species. For over 140 years teeth reminiscent of the genus Dakosaurus have been known from the Oxford Clay Formation but these have never been properly described and their taxonomy and systematic affinity remain contentious. Leer más.
El barrio de La Solana en Telde sigue siendo el punto donde más se han localizado, pero también se han encontrado ejemplares en Caserones y en el núcleo urbano del municipio. Los responsables de esta iniciativa sostienen que no se ha podido controlar aún la invasión pese a que se apresaron menos que en 2011. Leer más.
