[2] The type specimen was found on Mahé island in the Seychelles on a path to Le Niol Road at an elevation of 70 m (230 ft) in January 1974.

[2] Although the thallus granules are referred to as "soredia" in this publication, other researchers have called them goniocysts, and the inconsistent usage of the terminology has caused confusion in the literature.

The apothecia, or reproductive structures, are rounded and range in size from 0.25–0.5 mm in diameter, with a pale yellow to orange-yellow colour.

[2] Bacidina sorediata is distinct from other similar species in the genus due to the combination of a microsquamulose thallus with discrete, differently colored soralia.

[2] The genus Bacidina includes crustose lichens that typically have a granulose to microsquamulose thallus and pale yellow to orange apothecia.