Rusavskia sorediata is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae.

The lichen was first formally described by the Finnish lichenologist Edvard August Vainio in 1881, as Lecanora elegans var.

[1] In 2003, Sergey Kondratyuk and Ingvar Kärnefelt transferred it to their newly circumscribed genus Rusavskia.

[3] The lichen develops small, spherical pustules on its surface, which eventually become granular soredia.

Because of the characteristic appearance imparted by these granular propagules, in North America, a common name used for this species is sugared sunburst lichen.