357. Delicate Red-nosed Tree Mouse Juliomys ossitenuis French: Juliomys délicat / German: Zierliche Juliomaus / Spanish: Ratén arboricola de hocico rojo delicado Taxonomy. J uliomys ossitenuis L. P. Costa et al, 2007, Fazenda Neblina, 1300 m, Parque Estadual da Serra do Brigadeiro, Minas Gerais, Brazil. This species is monotypic. Distribution. SE & S Brazil, from Espirito Santo to Rio Grande do Sulstates. Descriptive notes. Head-body 81-97 mm, tail 102-116 mm, ear 14-17 mm, hindfoot 19-22 mm; weight 14-28 g. The Delicate Red-nosed Tree Mouse is small, with tail longer than head-body length and faintly bicolored, terminating in short tuft. Fur is soft and short, dorsum is dark orange-brown, venter is contrastingly cream white, and nose, rump, and inner pinnae are orange-brown. Dorsal surfaces of hands and feet are covered with pale orange hairs. Chromosomal complement is 2n = 20, FN = 36. Habitat. Atlantic Forest and semideciduous forests (both Dense Ombrophilous Forest and Mixed Ombrophilous Forest habitats) above elevations of 800 m. A male Delicate Red-nosed Tree Mouse was captured in a linear transect of pitfall traps set in riparian forest along a river c.2 m wide. Food and Feeding. No information. Breeding. A lactating Delicate Red-nosed Tree Mouse was collected at the beginning of the dry season in May. Activity patterns. The Delicate Red-nosed Tree Mouse is nocturnal. Movements, Home range and Social organization. No information. Status and Conservation. Not assessed on The IUCN Red List. Most known specimens of Delicate Red-nosed Tree Mice are from protected areas of mature, continuous forests. Bibliography. Aguieiras et al. (2013), Costa et al. (2007), Grazzini, Mochi-Junior, de Oliveira, Pontes, de Almeida, Sbalqueiro et al. (2015), Pavan & Leite (2011), Sarti (2016).

Published as part of Don E. Wilson, Russell A. Mittermeier & Thomas E. Lacher, Jr, 2017, Cricetidae, pp. 204-535 in Handbook of the Mammals of the World – Volume 7 Rodents II, Barcelona :Lynx Edicions on page 411, DOI: 10.5281/zenodo.6707142