Carbacanthographis brasiliensis is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in São Paulo, Brazil, it was formally described as a new species in 2022 by Shirley Cunha Feuerstein and Robert Lücking. The type specimen was collected from Mirante de São José dos Alpes at an altitude of 1,750 m (5,740 ft); here, in a cloud forest, the lichen was found growing on a tree. It has a whitish grey thallus without a cortex and also without a prothallus. It is similar to Carbacanthographis aptrootii, but unlike that species, it does not contain any lichen products. The specific epithet brasiliensis refers to the country from which it was first documented.