The Acre Antshrike (Thamnophilus divisorius) is a member of the antbird family (Thamnophilidae). Its closest relatives are the Streak-backed Antshrike and the Amazonian Antshrike (Whitney et al. 2004).
It was discovered in 1996 in the Acre Arch uplands in the state of Acre in Brazil, and described as a species new to science in 2004.
It is found in low-growing woodland. Its known range lies within the remote Parque Nacional da Serra do Divisor in Brazil and the adjacent Parque Nacional de la Sierra del Divisor in Peru, but it is believed to be common there. It has only recently been evaluated by BirdLife International where it has been given a status of Least Concern for the 2007 Red List.