Dinosaurs are a diverse group of reptiles of the clade Dinosauria.They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 million years ago; their dominance ...Anurognathus is a genus of small pterosaur that lived approximately 155140 million years ago during the late Jurassic Period (Tithonian stage). It had a short head with pinlike teeth for catching insects and although it traditionally is ascribed to the long tailed pterosaur group (Rhamphorhynchoidea), its tail was comparatively short, allowing it more maneuverability for hunting.1 The ...
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