Cerothallia subluteoalba is a species of corticolous (bark-dwelling), crustose lichen in the family Teloschistaceae.

[1] The taxon was transferred to the genus Cerothallia in 2013 as part of a major molecular phylogenetics-informed restructuring of the family Teloschistaceae.

[4] Cerothallia subluteoalba has a diffuse, barely noticeable growth pattern, which can either blend into the surface it grows on or be completely absent.

The true exciple of the apothecia is a dull to bright yellow or orange colour, very narrow (about 0.03 to 0.05 mm wide) and slightly rises above the hymenium (the spore-producing layer).

The supporting structures within the hymenium (paraphyses) are heavily branched and tend to swell at the tips, often containing brownish, lamp-shaped oil cells.