The Superfamily Muroidea comprises a vast group of rodents that are characterized by their small size, sharp teeth, and nocturnal behavior. Synonyms for this superfamily include the Muroidea, the Muridae family, and the Old World rats and mice. The Muroidea superfamily features a wide range of rodents, including house mice, brown rats, voles, hamsters, and gerbils. They have a global distribution, and can be found in Europe, Asia, Africa, Australia, and the Americas. The Muroidea superfamily is notable for its ecological and evolutionary diversity, and its members are important components of many terrestrial ecosystems. Despite their small size, these rodents play a significant role in food webs, seed dispersal, and soil fertility, and are therefore essential to the functioning of many natural ecosystems.