Graptemys is a genus of turtles known commonly as map turtles or sometimes sawback turtles. They are aquatic, freshwater basking turtles that are foun throughout the eastern half United States and into southern Canada. They superficially resemble many other species of aquatic turtle, including sliders (genus Trachemys) and cooters (genus Pseudemys), but are distinguished by a keel that runs the length of the center of their carapace, and that they don't typically grow as large. The name map turtle is given to them because of the map-like markings on their carapace.