Chacoan mara the capybara, and guinea pigs. Chacoan maras are closely related to the other member of the genus "Dolichotis", the Patagonian mara. Maras are the fourth largest rodent in the world after the capybaras, beavers and porcupines . Though the mara may look like a rabbit, the rabbit is not actually a rodent and therefore not as closely related to the mara as one might expect. Chacoan mara The Chacoan mara, Dolichotis salinicola, is a relatively large South American rodent of the cavy family. They are a close relative of the better known Patagonian mara. The Chacoan mara lives in the
Guinea pig made by the guinea pig: "C. porcellus" is not found naturally in the wild; it is likely descended from closely related species of cavies, such as "C. aperea", "C. fulgida", and "C. tschudii", which are still commonly found in various regions of South America. Studies from 2007–2010 applied molecular markers and studied the skull and skeletal morphology of current and mummified animals, thereby revealing the ancestor to most likely be "Cavia tschudii". Some species of cavy identified in the 20th century, such as "C. anolaimae" and "C. guianae", may be domestic guinea pigs that have become feral by reintroduction into