DistributionRead full entry
Range DescriptionThe range is reportedly delimited to the north and west by the Rios MamorÃ©-Madeira and JiparanÃ¡, and to the south by the Serra dos PacÃ¡as Novos, where it may be parapatric with M. melanura, which is âtypically found in the savanna-like vegetation, rather than rain forest ecosystems, that predominate in southern RondÃ´nia. Ferrari et al. (1995) failed to find any evidence of the occurrence of marmosets during surveys of the GuajarÃ¡-Mirim State Park in west-central RondÃ´nia. Likewise no marmosets were recorded at Pimenta Bueno on the upper Rio JiparanÃ¡ (Ferrari et al. 1996), although G. R. MonÃ§Ã£o has recorded this species there (pers. comm. to A. B. Rylands, February 2006). The range of this marmoset, as such, is evidently much smaller than previously thought.
Vivo (1985) argued that the Foz do Rio Castanho specimens, later described as Callithrix argentata marcai by Alperin (1993) were similar, and Vivo (1985) made no mention of the two other localities indicated by Hershkovitz (1977: 214b, mouth of the Rio JiparanÃ¡, upper Rio Madeira; and 214c, UrupÃ¡, Rio JiparanÃ¡), but his map would argue that they would also be âC. emiliaeâ. The discovery of M. nigriceps (Ferrari and Lopes 1992) means that the range of Vivoâs (1985) âC. emiliaeâ is restricted to the left bank of the Rio JiparanÃ¡.