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• W2091211460 abstract "We evaluated brain size evolution in a specialized subterranean mammal, the ctenomyid rodent genus <i>Ctenomys </i>(tuco-tuco) and compared it, within a phylogenetic framework, to other caviomorph rodents differing in body size and modes of life. Although brain size in <i>Ctenomys</i> falls below the regression line obtained for caviomorph rodents, some fossorial species within the sister family Octodontidae, which make use of both above and below ground habitats, have a relatively larger brain size. <i>Ctenomys</i> has experienced a relatively recent and ‘explosive’ cladogenesis which yielded ∼60 living species differing almost one order of magnitude in body size. Based on the evolutionary lag hypothesis between body versus brain size evolution, a negative correlation between encephalization quotient and body size would be expected for a group experiencing such a recent diversification in size. This is because a decrease of body size occurring during the emergence of a new species should produce a correspondingly greater encephalization and vice versa. Despite the fact that the allometric coefficient of brain weight versus body weight for 30 living species of <i>Ctenomys</i> was lower than that obtained for families within Caviomorpha, we failed to find any significant relationship between encephalization and body weight. Finally, the relationship between brain size and metabolism was assessed for those species of <i>Ctenomys</i> in which metabolic data are available. Brain size evolution in <i>Ctenomys</i> is discussed in regards to sensory capabilities and behavioral attributes associated with the occupation of a subterranean ecological niche." @default.
• W2091211460 created "2016-06-24" @default.
• W2091211460 creator A5029879319 @default.
• W2091211460 creator A5079789679 @default.
• W2091211460 date "2009-01-01" @default.
• W2091211460 modified "2023-10-06" @default.
• W2091211460 title "Evolution of Brain Size in a Highly Diversifying Lineage of Subterranean Rodent Genus <i>Ctenomys</i> (Caviomorpha: Ctenomyidae)" @default.
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• W2091211460 doi "https://doi.org/10.1159/000218738" @default.
• W2091211460 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19451709" @default.
• W2091211460 hasPublicationYear "2009" @default.
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