Allographa itatiaiensis is a little-known species of lichen-forming fungus in the family Graphidaceae. Originally described in 2011 as a member of the genus Graphis, it was later transferred to Allographa in 2018 during a major reorganization of script lichen genera. The species forms thin, greenish-grey crusts on tree bark, distinguished by small spherical outgrowths and star-shaped clusters of slender, branching fruiting bodies. It is known only from humid Atlantic Forest environments in southeastern Brazil, where it grows on tree bark in shaded, moist conditions.

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