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.
Atlantic semi-deciduous forests The Bahia interior forests lie west of the Bahia coastal forests in Bahia, Minas Gerais, and Espírito Santo states. The Paraná-Paraíba interior forests, also known as the Alta Paraná Atlantic forests, lie inland from the Serra do Mar coastal forests, extending inland across the Brazilian states of Rio de Janeiro, Minas Gerais, São Paulo, Goiás, Mato Grosso do Sul, Paraná, Santa Catarina, and Rio Grande do Sul, the Argentinian province of Misiones, and eastern Paraguay. Atlantic semi-deciduous forests The Atlantic semi-deciduous forests, also known as the Atlantic interior forests, are a belt of tropical moist broadleaf forests that are part