Originally posted by YellowLabLover
Yes, they are rodents. They are called hystricomorph (looked up the spelling, lol) rodents, just like porcupines and chinchillas. I have no clue what hystricomorph means, I would love to know.

The Guinea Pig's cousin, the Capybara, is the worlds largest rodent. They live in South America, and look like giant Guinea Pigs.
The suborders of rodents have to do with the way their jaws and jaw muscles connect. That's why their faces look different. LOL!

I had a class in mammalogy last term. We had to learn how to classify/identify EVERY kind of mammal based on skulls, coats, habits, etc.