Definition
The *genus Neofiber* includes a single species, *Neofiber alleni*, also known as the round-tailed muskrat. It's a type of rodent found in the southeastern United States. Unlike other muskrats, it has a round tail rather than a flattened one. A genus groups together similar species, and in this case, there's only one. It's like having a family with only one child. The genus designation helps scientists classify and study this unique creature.