Tanagra diademata (protonym) The diademed tanager (Stephanophorus diadematus) is a species of Neotropical bird in the tanager family Thraupidae.

It is purple-blue with a white crown characterised by a small red patch, and it is found mostly in open areas in southern Brazil, northeast Argentina, and Uruguay.

The diademed tanager was formally described and illustrated in 1823 by the Dutch zoologist Coenraad Jacob Temminck under the binomial name Tanagra diademata.

[3] This is now the only species placed in the genus Stephanophorus that was introduced in 1841 by the English naturalist Hugh Edwin Strickland.

The specific epithet diadematus is Latin meaning "diademed".