نتایج جستجو برای: palaeontology
تعداد نتایج: 429 فیلتر نتایج به سال:
The pre-Variscan sequence of the Carnic Alps is exposed across state border between north-east Italy and Austria. It includes Middle Ordovician to Lower Pennsylvanian rocks that, although affected by both Variscan Alpine orogeny, preserve continuous non-metamorphosed successions. Depositional settings vary from shallow water open marine environments. Remarkable presence largest Devonian reefs E...
From early dinosaurs with as many as nine wrist bones, modern birds evolved to develop only four ossifications. Their identity is uncertain, with different labels used in palaeontology and developmental biology. We examined embryos of several species and studied chicken embryos in detail through a new technique allowing whole-mount immunofluorescence of the embryonic cartilaginous skeleton. Bey...
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