This antwren lives in flooded coastal wetlands of southern Brazil. Males have a gray-black underside, while females have black-and-white mottling underneath; the bird uses marsh vegetation.
The male has a brown back and a gray-black underside. The female’s underside is mottled black and white.
It lives in low coastal wetlands flooded by tidal, river, or lake water. It uses herbaceous marshes as well as transition areas where trees grow above marsh plants.
An extinction-risk assessment has not been added yet.