The family containing the true frogs, including many Rana species, is Ranidae.
Ranidae is a large frog family whose members are commonly called true frogs. The family includes the familiar genus Rana, although modern classifications have moved some formerly included species into other genera. Ranids are found across much of the world, on every continent except Antarctica.
True frogs are often smooth-skinned, long-legged and strongly associated with freshwater habitats. Many lay eggs in water and develop through a tadpole stage, but the family also includes species with unusual habitats, including some arboreal frogs and frogs able to tolerate brackish water.
A common mix-up is confusing Ranidae with Hylidae, the tree-frog family, or Bufonidae, the true-toad family. “True frogs” is the traditional common label for Ranidae, not a claim that every frog outside the family is somehow inauthentic. Taxonomy within the group continues to change as genetic studies revise relationships and genera.