Heterodentosaurus, also known as Heterodentosaurus and Echinosaurus, is a mammal-like carnivore that lived in the Permian. Heterodontosaurus is relatively close to mammals and far from dinosaurs, lizards, birds, etc. Its fossils are in North America and Europe. Heterodontosaurus is a carnivorous paleontology of the Permian period. The general public associate heterodontosaurus with dinosaurs, but heterodontosaurus is not actually a dinosaur. More precisely, they are classified as Panosauria. Although it looks like a lizard, the relationship between heterodentosaurus and mammals is closer and farther away from true reptiles (such as dinosaurs, lizards, birds, etc.).

Heterodontosaurus, also known as Heterodontosaurus or Spinosaurus, is a carnivorous animal resembling a mammal that lived during the Permian period. Heterodontosaurus has a close relationship with mammals, but a distant relationship with dinosaurs, lizards, birds, etc. Its fossils are found in North America and Europe. Heterodontosaurus is a carnivorous ancient organism from the Permian period. The general public associates Heterodontosaurus with a dinosaur, but it is not actually a dinosaur. More precisely, they are classified as Panosauriformes. Although it resembles a lizard in appearance, Heterodontosaurus has a closer relationship with mammals and is farther away from true reptiles such as dinosaurs, lizards, birds, etc.