urson
North American porcupine
erethizontoid
erethizontid
Canadian porcupine
Erethizontidae
family Erethizontidae
hystricomorph
porpitid
Trichys
genus Trichys
porcelliid
spiny rat
New World porcupine
ianthellid
genus Erethizon
eusirid
Erethizon
pallescensone
Old World porcupine
porky
desert candle
spine pig
sponge genus
yellow-browed bunting
coendou
cupgrass
hystricid
Atherurus
genus Atherurus
porocephalid
stegocephalian
genus Petteria
genus Tachypleus
urechid
Petteria
erythronium
Tachypleus
ectotroph
Pallas's bunting
hydractiniid
ambulacrarian
stegocephalid
subfamily Philadelphaceae
Cape porcupine
Philadelphaceae
apolemiid
family Hystricidae
eremurus
Hystricidae