A 2002 taxonomic study treated birds called Dendroplex necopinus as the same species as D. kienerii. Field records under the former name were mainly from tall seasonally flooded forest along Amazonian riverbanks and islands.
Museum comparisons found pale centers on the breast feathers extending close to the tips, and a light rusty belly that contrasts with the breast.
Field records under the former name Dendroplex necopinus were mainly from tall seasonally flooded várzea forest along banks and islands of the Amazon River and major tributaries. The paper treats that name as a synonym of this species.
An extinction-risk assessment has not been added yet.