The Sulphur-bellied Tyrant-Manakin occurs from eastern Peru to northern Bolivia and adjacent western Amazonian Brazil. A yellow stripe down the middle of its crown is a field mark. It uses dense undergrowth in humid forest, especially along rivers; little is known about its diet.
It has a long bill and tail, with a yellow median stripe on the crown.
It inhabits dense undergrowth in humid forests, particularly in riverine forest.
An extinction-risk assessment has not been added yet.