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

[1] Found in Brazil, it was formally described as new to science in 2014 by the lichenologists Shirley Feuerstein, Iane Cunha, and André Aptroot.

The type specimen was collected by Feuerstein from Fazenda São Paulo (Itaguatins, state of Tocantins), where it was found growing on tree bark.

The lichen has an opaque, irregular, whitish-cream thallus that lacks soredia and isidia.

Additionally, this species contains protocetraric acid, a lichen product that can be detected using thin-layer chromatography.