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What is the meaning of the name Tuco?

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The name "tuco-tuco" makes reference to the typical vocalization of the genus Ctenomys, that sounds like "tuc-tuc". In other countries from South America it is named "tucu-tuco" (e.g. Uruguay), "tunduque" and "oculto". Ctenomys, the sole living genus of the family Ctenomyidae, is characterized by a high species richness (~60 recognized living species) and it is distributed along Argentina, Bolivia, Uruguay, Peru, Paraguay and Brazil.