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.