Hystricognathi
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The Hystricognathi are an infraorder of rodents, distinguished from other rodents by the bone structure of their skulls. The masseter medialis passes partially through a hole below each eye socket and
Capromys pilorides
Skull of a nutria demonstrating the hystricognathous lower jaw and hystricomorphous zygomasseteric system
New World porcupine
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The New World porcupines, family Erethizontidae, are large, arboreal rodents, distinguished by their spiny coverings from which they take their name. They inhabit forests and wooded regions across Nor
Hystricognathi
…Echimyidae (spiny rats, hutias, and coypu) Erethizontidae (New World porcupines) Octodontidae (13 species including the degus…
Porcupine Bio Dome
Up close view of head and front claws, Kenai National Wildlife Refuge, Alaska