1) Animal order 2) Suborder hystricomorpha 
The term Hystricomorpha (from Latin hystrix `porcupine` and Greek μορφή, morphē `form`) has had many definitions throughout its history. In the broadest sense, it refers to any rodent (except dipodoids) with a hystricomorphous zygomasseteric system. This includes the Hystricognathi, Ctenodactylidae, Anomaluridae, and Pedetidae. Molecular...
[n] - an order of rodents including: porcupines
suborder Hystricomorpha noun an order of rodents including: porcupines; guinea pigs; chinchillas; etc.