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

Found in Papua New Guinea and Brazil, it was formally described as a new species in 2022 by Shirley Cunha Feuerstein and Robert Lücking.

The type specimen was collected from Kagi Village (Owen Stanley Range, Central Province).

[1] The lichen has a greyish white to yellowish grey thallus with a thin cortex and a black prothallus.

Carbacanthographis pseudorustica contains protocetraric acid, a lichen product that can be detected using thin-layer chromatography.