Hystricognathi is a class of rodents. There are 287 species of Hystricognathi, in 91 genera and 16 families. This class has been around since the eocene epoch. It includes groups like Dassie Rats, Cane Rats, and Old World Porcupines. They are herbivores. Reproduction is viviparous.
EOL has data for 14 attributes, including: