New records of the red-rumped mouse Juliomys pictipes ( Osgood , 1933 ) ( Rodentia : Sigmodontinae ) in coastal Atlantic Forest of Paraná , southern Brazil

Juliomys pictipes is a Sigmodontinae rodent endemic to the Atlantic Forest. Herein, we report the irst records of the species on the coast of the state of Paraná, illing a gap in the species’ distribution. Records at low altitudes in the eastern part of the Serra do Mar conirm that the coastal mountains are not a barrier to the species’ distribution.


R. A. S. Cerboncini et al.
The red-rumped mouse Juliomys pictipes (Osgood, 1933) is a Sigmodontinae rodent endemic to the Atlantic Forest with occurrence in southeastern and southern Brazil, Paraguay and Argentina (PAVAN;LEITE, 2011).Juliomys pictipes is the type species of the genus Juliomys González, 2000, which was described as monotypic (GONZÁLEZ, 2000) and currently includes two more described species -J.rimofrons Oliveira &Bonvicino, 2002 andJ. ossitenuis Costa, Pavan, Leite &Fagundes 2007.Because of this historical gap in the group taxonomy, allied with the fact that Juliomys spp.are morphologically similar to other colored small-sized Atlantic Forest Sigmodontinae (PAVAN; LEITE 2011), Juliomys spp.have only recently been described in the literature (OLIVEIRA; BONVICINO, 2002;CHEREM et al., 2004;CHEREM, 2005;COSTA et al., 2007;PARDIÑAS et al., 2008;SANCHA et al., 2009).The species' distribution extends from the states of Espírito altitude: 36 m) (Figure 1).Vegetation where specimens were collected is submontane Atlantic rainforest.We report four new localities of occurrence of J. pictipes in the state of Paraná (Figures 1 and 2).Juliomys pictipes specimens (Table 1; Figures 3 and  4) were distinguished from other species of Juliomys by their larger size, pelage coloration, and a more robust braincase, with broad interorbital region and deep zygomatic notch (Costa et al., 2007).Most of the previous records of J. pictipes occurred to the western portion of the Serra do Mar mountain range, at altitudes above 500 m.The records in the PEPM and PNSHL were to the eastern portion of the mountains and at lower altitudes.Also, the specimen MZPUC 1162 and the ones from PEPM were collected on opposite sides of the same mountain, which conirms that the Serra do Mar mountain range is not a barrier to the species' occurrence.Records in the PNSHL were at altitudes near sea level -even lower than altitudes at collection sites to the central parts of the continent in the state of the Rio Grande do Sul and in Paraguay and Argentina.
Sigmodontinae rodents are the most diverse group of mammals in Brazil (PAGLIA et al., 2012), and ield surveys have been important for understanding species' distributions (e.g., PASSAMANI et al., 2011).Field surveys in regions with conserved forests such as the coastal Atlantic Forest of the state of Paraná are of particular interest.Species occurrence records, such as those reported here, can help planning efforts to obtain ield information for further taxonomic, ecological and conservation studies.Demo Version, http://www.verydoc.comand http://www.verypdf.com Santo and Minas Gerais to the coast of Santa Catarina in Brazil, and to the west to Paraguay and Argentina (PAVAN; LEITE, 2011).Most records have been along the coastal Atlantic Forest in the state of São Paulo.Here, we report the irst records of J. pictipes on the coast of Paraná, illing a gap of approximately 370 km in the species' distribution along the Serra do Mar mountain range.Juliomys pictipes individuals were captured using Sherman traps at Marumbi State Park (PEPM), in the municipality of Morretes (25°25'S, 48°55'W; altitude: 380-450 m), and using pitfall and tomahawk traps at St. Hilaire-Lange National Park (PNSHL), in the municipalities of Paranaguá (25°36'S, 48°38'W; altitude: 147 m) and Matinhos (25°44'S, 48°33'W;

FIGURE 1 :
FIGURE 1: Map of collecting localities of Juliomys pictipes in Brazil, Argentina and Paraguay.

FIGURE 3 :
FIGURE 3: Dorsal (A) and ventral (B) views of specimens DZUP 393, 394, 395 and 592, from left to right, of Juliomys pictipes of Atlantic Forest in the state of Paraná, southern Brazil.

TABLE 1 :
Specimens of Juliomys pictipes collected at Marumbi State Park (PEPM) and St. Hilaire-Lange National Park (PNSHL) in the state of Paraná, southern Brazil, with external measurements.
W -weight in g; HB -head and body length in mm; Tail -tail length in mm; HF -hind foot length without claw in mm; Ear -ear length in mm.*Information not available.