Abstract
Juliomys ossitenuis Costa, Pavan, Leite and Fagundes, 2007 was previously known in Brazil from the Atlantic Forest of the Southeastern Region to the Dense Ombrophilous Forest and Araucaria Forest of the Southern Region. The new record from Chapecó, in Santa Catarina state, confirmed by morphological and cytogenetic analyses, extends its distribution about 300 km westwards. This is the westernmost record for the species, in a region characterized by the transition between deciduous and Araucaria forests.
Highlights
Juliomys González, 2000 (Cricetidae, Sigmodontinae) is a genus of rodent that occurs from the states of Espírito Santo to Rio Grande do Sul (Southeastern to Southern Brazil), westward to eastern Paraguay and northeastern Argentina (Pavan and Leite 2011), reaching the southernmost portion of the Atlantic Forest (Rizzini 1997; Galindo−Leal and Câmara 2005)
Parque Nacional de Aparados da Serra, municipality of Cambará do Sul). This last one occurs in the southern portion of the Atlantic Forest, which is characterized by the subtropical Mixed Ombrophilous Forest that is still poorly known regarding the diversity of Sigmodontinae rodents
This study reports a record of two individuals of Juliomy ossitenuis in the state of Santa Catarina, in a fragment of Deciduous Seasonal Forest, representing the westernmost record of the species in Brazil
Summary
Juliomys González, 2000 (Cricetidae, Sigmodontinae) is a genus of rodent that occurs from the states of Espírito Santo to Rio Grande do Sul (Southeastern to Southern Brazil), westward to eastern Paraguay and northeastern Argentina (Pavan and Leite 2011), reaching the southernmost portion of the Atlantic Forest (Rizzini 1997; Galindo−Leal and Câmara 2005). Four species are currently recognized: J. pictipes (Osgood, 1933) (type locality in Argentina, Misiones, Río Paraná); J. rimofrons Oliveira & Bonvicino, 2002 (type locality in Brazil, Minas Gerais, Itamonte, Brejo da Lapa); J. ossitenuis Costa, Pavan, Leite & Fagundes, 2007 (type locality in Brazil, Minas Gerais, Parque Estadual da Serra do Brigadeiro); and the recently described J. ximenezi Christoff, Vieira, Oliveira, Golçalves, Valiati & Tomasi, 2016 Parque Nacional de Aparados da Serra, municipality of Cambará do Sul) This last one occurs in the southern portion of the Atlantic Forest, which is characterized by the subtropical Mixed Ombrophilous Forest (or Brazilian Araucaria Forest) that is still poorly known regarding the diversity of Sigmodontinae rodents.
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