The lesser Wilfred's mouse is a species of South American rodents of the family Cricetidae. It was first described by Wilfred H. Osgood under the name Thomasomys pictipes, then into the genus Wilfredomys, and now known as Juliomys pictipes. The lesser Wilfred's mouse is endemic to northeastern Argentina and southeastern Brazil. Its physical appearance ranges from dark brown to light orange coloration and the typical size is small to medium. This species is arboreal, spending most of its time trees and living in the local forests at altitudes from sea level to 2000 m. Currently, this species is listed as Least Concern by the IUCN, but, threats include livestock farming, ranching, and wood harvesting.
Nesoryzomys indefessus, also known as the Santa Cruz nesoryzomys or Indefatigable Galápagos mouse, is a rodent of the genus Nesoryzomys of family Cricetidae from Galápagos Islands of Ecuador. It contains two subspecies: one formerly lived on Santa Cruz Island, but is now extinct, probably due to the introduction of black rats; and another that is still alive on Fernandina Island. The two are sometimes considered to be different species.
The four-striped grass mouse or four-striped grass rat, is a species of rodent in the family Muridae.
Nectomys grandis, also known as the Magdalena-Cauca water rat, is a nocturnal, semiaquatic species of rodent in the genus Nectomys of family Cricetidae. It is found in western and northern Colombia at altitudes from sea level to 2000 m, including the basins of the Magdalena, Cauca and Porce rivers. It has two subspecies, N. g. grandis and N. g. magdalenae.
Juliomys anoblepas is a rodent in the genus Juliomys of the subfamily Sigmodontinae known from a single broken skull. The specimen was collected by Peter Wilhelm Lund in the caves of Lagoa Santa, Minas Gerais, Brazil, in the first half of the 19th century and described by Herluf Winge in 1888 as Calomys anoblepas. The species remained unstudied and its affinities unclear until 2011, when it was recognized as a member of the genus Juliomys, which includes three other species from southern Brazil and nearby Argentina and Paraguay. J. anoblepas is probably a separate extinct species of the genus, which is no longer found at Lagoa Santa.
Juliomys is a genus of South American rodents of the family Cricetidae. Five species are known, all found in Argentina and Brazil. They are as follows:
