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

Found in Yunnan, China, it was formally described as a new species in 2022 by Shirley Cunha Feuerstein and Robert Lücking.

It has a greyish to yellowish grey thallus that lacks both a cortex and a prothallus.

It contains norstictic acid, a lichen product that can be detected using thin-layer chromatography.

The collector of the type, Dutch lichenologist André Aptroot, is honoured in the specific epithet "for his numerous, important contributions to tropical lichenology".