Genus Ankylosaurus, a group of armored dinosaurs, was prevalent during the late Cretaceous period. It is also known as the "fused reptile" due to its bony armor that covered its entire body, leaving only its underbelly unprotected. Some synonyms for Ankylosaurus are A. magniventris, A. deinacolus, A. penicillatus, and A. cuvieri. All of these species had unique characteristics, such as the length of their tails and the shape of their skulls. Ankylosaurus was a herbivore but had a formidable defense mechanism. Its tail was club-shaped, and it had spikes on its back that could fend off predators. Even though Ankylosaurus lived millions of years ago, it continues to fascinate scientists and dinosaur enthusiasts alike.