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Head-body 20-27 cm; tail 20-27 cm; weight 250-500 g.
A strikingly-coloured arboreal squirrel of the extreme south rainforest. Upperpart black, underpart and lower part of both legs chestnut red, between which there is a broad white side stripe running from the snout to hind quarter, with a thin black line below it. Tail bushy black, as long as the head-body length.