689.

Sanborn’s Soft-haired Mouse

Abrothrix sanborni

French: Abrothrix de Sanborn / German: Sanborn-Andenfeldmaus / Spanish: Raton de pelaje suave de Sanborn

Other common names: Sanborn’s Akodont, Sanborn's Grass Mouse

Taxonomy. Akodon (Abrothrix) sanborni Osgood, 1943, “mouth of Rio Inio, south end of Chiloe Island [= Isla Grande de Chiloé],” Los Lagos, Chile .

Abrothrix sanborni is in the subgenus Abrothnix. Until recently, it encompasses two distinct lineages that now each rank as species; populations from northern Chiloe Island and adjacent mainland do not represent A. sanborni but rather A. manni. Most available literature referring to A. sanborni now relates to A. manni. Monotypic.

Distribution. SC Chile, including C & S Chiloe I and EC Aysén Region.

Descriptive notes. Head-body 100-115 mm,tail 69-85 mm, hindfoot 23-5-25-5 mm. No specific data are available for body weight. See general characters of the genus under the Long-haired Soft-haired Mouse (A. longipilis) account. Sanborn’s Soft-haired Mouse is a small, with uniform blackish brown color including tail and feet; tail is ¢.80% of head— body length; and ears small and scantily haired. It resembles Mann’s Soft-haired Mouse (A. manni) in external and cranial appearance; minor differences in Sanborn’s Softhaired Mouse include darker color, with dark gray hairs and blackish to brownish tips; less contrasting gray tones of individual hairs on venter; rhinarium and lips covered by short, thin blackish hairs; and forefeet and hindfeet dorsally covered by short brown hairs.

Habitat. Coastal Valdivian rainforests and evergreen forest of Nothofagus dombeyi and N. betuloides (both Nothofagaceae); Drimys winter: ( Winteraceae); and Lomatia ferrugimea ( Proteaceae) at elevations up to 800 m.

Food and Feeding. No information.

Breeding. No information.

Activity patterns. Sanborn’s Soft-haired Mouse is terrestrial.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Near Threatened on The IUCN Red List (including A. mannz).

Bibliography. D'Elia, Teta et al. (2015), Osgood (1943a), Patterson & D'Elia (2008a), Patterson et al. (2015).