Preface.- The history of Ctenomys in the fossil record: a young radiation of an ancient family.- A short overview of the systematics of Ctenomys: species limits and phylogenetic relationships.- Speciation in the genus Ctenomys: an attempt to find models.- Geographical and macroecological patterns of tuco-tucos.- Phylogeography and landscape genetics in the subterranean rodents of the genus Ctenomys.- Skull shape and size diversification in the Genus Ctenomys (Rodentia: Ctenomyidae).- Biomechanics and strategies of digging.- Adaptive pelage coloration in Ctenomys.- Environmental and ecological features of the genus Ctenomys.- The diet of ctenomyids.- Ecological physiology and behavior in the genus Ctenomys.- Effects of environmental pollution on the conservation of Ctenomys.- Index.