Morphological diagnosis and geographic distribution of Atlantic Forest red-rumped mice of the genus Juliomys (Rodentia: Sigmodontinae)

The presence of Wilfredomys oenax (Rodentia: Cricetidae: Sigmodontinae) in São Paulo state, southeastern Brazil: a locally extinct species?

“…Although morphology studies on Wilfredomys are scarce when compared to other genera from southeastern Brazilian Atlantic Forest, descriptions of Ávila-Pires (1960), Pine (1980) and González (2000) provide data on general pelage characters: long, lax and soft dorsal fur; brownish (somewhat grayish) dorsal pelage with orangish nose, ears and rump; yellowish (somewhat buffy) gray-based venter, except for the self colored yellow throat region (Fig. 2); light orangish manus and feet; long dorsoventrally bicolored tail; medium sized rodent (Table 1), much larger than Juliomys, the most externally similar Atlantic Forest species (Pavan & Leite, 2011: Table I and II). Additionaly, craniodental characters described by Percequillo et al (2004) unambiguously distinguish Wilfredomys from other pentalophodont Atlantic Forest Sigmondontinae genera: Skull with medium length rostrum and shallow and narrow zygomatic notch ( Fig.…”

“…Although the phylogenetic position of these three genera remains unresolved, or at least controversial (see Reig, 1980;Pacheco, 2003;D'Elía et al, 2007;Ventura et al, 2013), some advances on Wiedomys and Juliomys were obtained, including new species (Oliveira & Bonvicino, 2002;Gonçalves et al, 2005;Costa et al, 2007) and new records (Pavan & Leite, 2011;Fonseca et al, 2013). Conversely, Wilfredomys Ávila-Pires (1960) and Pine (1980).…”

“…The most updated of those lists was made by Vivo et al (2011), which reported 231 species and described recent advances on mammal studies from which some facts draw attention to São Paulo state mammal fauna, such as the presence of recently described species (Leite et al, 2008;Percequillo et al, 2011;Costa et al, 2011) and even a new genus . New data on mammal species from São Paulo are obtained through new inventories (e.g., Gregorin et al, 2004;Steiner-Souza et al, 2008;Velazco, et al, 2010) and by museum specimens (e.g., Silva et al, 2003;Gregorin et al, 2004;Pavan & Leite, 2011;Garbino, 2011), including records of rare and/or threatened species (e.g., Vaz, 2000;Percequillo et al, 2004;Vivo et al, 2011).…”

Patterns of arboreal and terrestrial space use by non-volant small mammals in an Araucaria forest of southern Brazil

“…This fact provides evidences about its arboreal habitat use and association with small vegetation. These ecological data can help answer biogeographic questions about habitat use and distribution of Juliomys rodents (Pavan and Leite 2011). The correct identification of this rodent species was not possible, but based on their cranio-dental morphology we know that this is not the species found by Paresque et al (2009) in the National Park of Aparados da Serra, and probably is not the Juliomys pictipes.…”

First record of Juliomys ossitenuis Costa, Pavan, Leite & Fagundes, 2007 (Rodentia, Sigmodontinae) in Paraná state, southern Brazil

“…Juliomys is a genus of sigmodontine rodent characterized by its small size (total length [TL] between 165-238 mm; tail length [TA] between 89-138 mm), tail the same length as or longer than the body length, brown coloration on the dorsum, grayish on the shoulders and anterior portion, orangish on the posterior portion of the dorsum and snout -with the exception of J. rimofrons whose snout has the same color as the dorsum (Oliveira and Bonvicino 2002;Pavan and Leite 2011) -and small feet covered by orangish-brown hairs (Bonvicino et al 2008). The genus was described by González (2000) to account for the morphological differences between Wilfredomys oenax Thomas, 1928 andW.…”