Belongs within: Hystricognathi.Contains: Cavioidea, Erethizontidae, Octodontoidea, Chinchillidae. The Caviomorpha are a clade uniting the Neotropical hystricomorph rodents, supported by molecular analysis (e.g. Meredith et al. 2011). They are mostly restricted to South America and the Caribbean islands, with only a single species, the porcupine Erethizon dorsatum, found in North America. Molecular data support a division… Continue reading Caviomorpha