Which species is the world's largest rodent?
Rodent two bags that may range from the mouth to the front of the shoulders. True mice and rats do not contain this structure but their cheeks are elastic due to a high degree of musculature and innervation in the region. While the largest species, the capybara, can weigh as much as , most rodents weigh less than . The smallest rodent is the Baluchistan pygmy jerboa, which averages only in head and body length, with adult females weighing only . Rodents have wide-ranging morphologies, but typically have squat bodies and short limbs. The fore limbs usually have five digits, including
Rodent such as Muridae had emerged. By the Miocene, when Africa had collided with Asia, African rodents such as the porcupine began to spread into Eurasia. Some fossil species were very large in comparison to modern rodents and included the giant beaver, "Castoroides ohioensis", which grew to a length of and weight of . The largest known rodent was "Josephoartigasia monesi", a pacarana with an estimated body length of 3 m (10 ft). The first rodents arrived in Australia via Indonesia around 5 million years ago. Although marsupials are the most prominent mammals in Australia, many rodents, all belonging to the