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Erethizon is a genus of New World porcupine and the only one of its family to be found north of southern Mexico.The North American porcupine (Erethizon dorsatum) is the only extant species, but at least 4 extinct relatives are known, the oldest dating to the Late Pliocene. [2]
The North American porcupine migrated from South America, where all New World porcupines or hystricomorphs evolved. Erethizon appeared in North America shortly after the two continents joined together in the later Tertiary period. Other hystricomorphs also migrated, but Erethizon was the only one to survive north of Mexico. No known fossils are ...
A porcupine is any of 30 species of rodents belonging to the families Erethizontidae (genera: Coendou, Erethizon, and Chaetomys) or Hystricidae (genera: Atherurus, Hystrix, and Trichys). Porcupines vary in size considerably: Rothschild's porcupine of South America weighs less than a kilogram (2.2 lb); the crested porcupine found in Italy ...
They include three genera, of which the first is represented by the North American porcupine (Erethizon dorsatum), a stout, heavily built animal, with long hairs almost or quite hiding its spines, four front and five hind toes, and a short, stumpy tail.
Erethizontinae is a subfamily of the New World porcupine family Erethizontidae, [1] and includes all species of the family with the exception of the bristle-spined rat, Chaetomys subspinosus, which is classified in its own subfamily, Chaetomyinae.
Erethizon; Erethizontidae; N. North American porcupine This page was last edited on 29 March 2013, at 09:57 (UTC). Text is available under the Creative Commons ...
Cape porcupine: Hystrix africaeaustralis : Extant: 30 kg (66 lb) 8: Crested porcupine: Hystrix cristata : Extant: 27 kg (60 lb) 9: North American porcupine: Erethizon dorsatum: Extant: 18 kg (40 lb) 10: Indian crested porcupine: Hystrix indica: Extant: 18 kg (40 lb) 11: Coypu: Myocastor coypus: Extant: 17 kg (37 lb) 12: Patagonian mara ...
North American porcupine: Erethizon doratum: Uncommon Northern and central Family: Zapodidae. Two species of jumping mice occur in Pennsylvania. Common name