Galápagos tortoise
The genus "Chelonoidis" has two main subcategories based on appearance and habitat- the "C. carbonarius" and the "C. chilensis" groups. The "C. carbonarius" group has the closely related red- and yellow-footed tortoises that clearly share a common ancestor. The "C. chilensis" group features the Chaco tortoise ("C. chilensis") and Galápagos tortoise ("C. niger"), which share similar habitats and a basic appearance, but otherwise do not seem to be closely related. The relationship between the groups is unclear.