Synura is a genus of colonial chrysomonad algae covered with silica scales.

Synura cells are variously shaped, typically spherical to pear-shaped or club-shaped.

[6] Identification of species depends on the morphology of the scales.

[6] Synura is the type and only genus in the family Synuraceae.

[1] The present taxonomy recognizes five sections:[4][5] This heterokont-related article is a stub.