Your current chain: State of matter Life > Kingdom Animalia > Phylum Chordata > Subphylum Vertebrata > Class Mammalia > Subclass Theria > Infraclass Placentalia > Superorder Euarchontoglires > Order Rodentia
(From Wikipedia) Rodents (from Latin rodere, 'to gnaw') are mammals of the order Rodentia, which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws.
FACT: Providing 40% of all mammal species, rodents are probably the largest order of mammals on the planet!
Currently discovered: 2/5 Suborders
Suborder