Ornithischians Diverge Within Dinosauria “Bird Hipped”
Ornithodirans were the early branch that later gave rise to both pterosaurs and dinosaurs, including birds.
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Dinosauria
Eoraptor lunensis.
Eoraptor reminds us that classification is not always neat at the beginning of a lineage. Early dinosaurs can be hard to classify because of a mix of traits.
Eoraptor lunensis. Read More »
Bird-line Archosaurs: Asilisaurus kongwe (within Ornithodira)
In a testament to our understanding of evolution, archosaurs emerged around 255 million years ago, eventually giving rise to dinosaurs about 230 million years ago. Bridging this gap, the dinosauromorphs – a transitional group between archosaurs and dinosaurs – evolved approximately 245 million years ago. One notable early dinosauromorph is Asilisaurus kongwe, found in present-day
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Bird-line Archosaur: Nyasasaurus parringtoni
One of the last bird-line archosaurs before true dinosaurs is the Nyasasaurus parringtoni, which lived during the Middle Triassic period, around 243 million years ago. Discovered in Tanzania, Nyasasaurus represents a key transitional form, showcasing features that are both dinosaurian and pre-dinosaurian, highlighting the evolutionary path leading to more well-known dinosaurs of the Late Triassic
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