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