Lemur of mouse lemurs, the gray mouse lemur ("M. murinus"), golden-brown mouse lemur ("M. ravelobensis"), and Goodman's mouse lemur ("M. lehilahytsara") were considered the same species until recently, when genetic tests identified them as cryptic species. The lemur dentition is heterodont (having multiple tooth morphologies) and derives from an ancestral primate permanent dentition of . Indriids, sportive lemurs, the aye-aye, and the extinct sloth lemurs, monkey lemurs, and koala lemurs have reduced dentitions, having lost incisors, canines, or premolars. The ancestral deciduous dentition is , but young indriids, aye-ayes, koala lemurs, sloth lemurs, and probably monkey lemurs have fewer deciduous teeth.
Northern dry deciduous forests about 2.5 percent of the ecoregion's area. Northern dry deciduous forests The Northern dry deciduous forests is a tropical dry broadleaf forest ecoregion of east-central India. It covers an area of , extending across portions of Andhra Pradesh, Chhattisgarh, Orissa, and Jharkhand states. The region extends north and south in the dry western rain shadow of the Eastern Ghats range, which block the moisture-laden monsoon winds from the Bay of Bengal to the east. It is surrounded by the more humid Eastern Highlands moist deciduous forests ecoregion. By the mid-1990s, more than three-quarters of the ecoregion's natural habitat had been