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#Staurikosaurus
Herrerasaurid that lived in the Late Triassic in what is now Brazil (Santa Maria Formation)
Small and probably fast, and bipedal carnivore
Had long, slender limb bones
Tibia longer than the femur
Had strong hindlimbs and small forelimbs
Estimated to be 7.5 ft (2.25 m) long and weigh 66 lb (30 kg)
Had a long, stiff tail (about 4.4 ft or 1.3 m), may have helped it run and jump
Not many fossils found, reconstructions tend to be based on it having some primitive features (so often shown as having five toes and five fingers)
Had only two sacral vertebrae, which is a very primitive feature
Had hollow limb bones with thick walls
Jawbone almost as long as the femur, so probably had a large head
Maybe had a sliding joint in the jaw so it could move forwards and backwards, and up and down, but a redescription of the holotype in 2011 found that the intramandibular joint and a few other characteristics, could not be confirmed because of either poor preservation or not available in the material
Probably ate small and medium-sized vertebrates
Had serrated teeth that curved back
May have been able to catch and hold its prey, and slice and tear flesh
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