Ocellularia gueidaniana is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae.

Found in Singapore, it was formally described as a new species in 2015 by Gothamie Weerakoon and Robert Lücking.

The type specimen was collected by the first author at a low elevation in the Bukit Timah Nature Reserve.

The species epithet honours lichenologist Cécile Gueidan.

This Ostropales-related article is a stub.