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fat-tailed dwarf lemur

n. (taxlink Cheirogaleus medius species noshow=1), one of the smallest primates, native to Madagascar, the only primate known to truly hibernate, which it does during Madagascar's dry season.

Wikipedia
Fat-tailed dwarf lemur

The fat-tailed dwarf lemur (Cheirogaleus medius), also known as the lesser dwarf lemur, western fat-tailed dwarf lemur, or spiny forest dwarf lemur, is endemic to Madagascar.