Southwestern Henan Province in central China contains many down-faulted basins, including the Xixia Basin where the Upper Cretaceous continental sediments are well exposed. The Majiacun Formation is a major dinosaur-bearing stratigraphic unit that occurs in this basin. Leer más.
Current knowledge of theropod dinosaurs of northern Africa and their diversity during the Early Cretaceous is deceptively fragmentary and commonly associated with inadequate stratigraphic and palaeoecological data. Leer más.
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Últimamente me cuesta muchísimo actualizar el blog a pesar de que tengo cantidad de fotos para mostraros, sobretodo de herpetos. Os dejo unas imágenes de Salamandra común (Salamandra salamandra fastuosa) de los últimos meses, todas ellas fotografiadas en Cantabria. Espero que os gusten… Leer más. |
The seas of the Mesozoic (266–66 Myr ago) were remarkable for predatory marine reptiles, but their modes of locomotion have been debated. One problem has been the absence of tracks, although there is no reason to expect that swimmers would produce tracks. Leer más.
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Guillem Pérez i de Lanuza andEnrique Font. J Exp Biol jeb.104281First posted online June 4, 2014, doi:10.1242/jeb.104281. Ultraviolet (UV) vision and UV colour patches have been reported in a wide range of taxa and are increasingly appreciated as an integral part of vertebrate visual perception and communication systems. Previous studies with Lacertidae, a lizard family with diverse and complex coloration, have revealed the existence of UV-reflecting patches that may function as social signals. However, confirmation of the signalling role of UV coloration requires demonstrating that the lizards are capable of vision in the UV waveband. Leer más.. |
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