Carbacanthographis aggregata is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in Asia, it was formally described as a new species in 2022 by Shirley Cunha Feuerstein and Robert Lücking. The type specimen was collected from the Gunung Pulai Forest Reserve in Johor (Malaysia) at an altitude of 150m (490feet). It has also been recorded from the Tai Po Kau Nature Reserve in China. The lichen has a greenish grey to grey thallus that lacks a cortex, but has a black prothallus. Its ascomata (ascospore-bearing structures) are aggregated in small clusters; it is this characteristic that is referred to in the specific epithet aggregata. The lichen contains salazinic acid and trace amounts of norstictic acid; these are lichen products that can be detected using thin-layer chromatography.