Caprettia lichexanthotricha is a species of lichen in the family Monoblastiaceae.

Found in Brazil, it was formally described as a new species in 2021 by lichenologists André Aptroot and Maria Fernanda de Souza.

The type specimen was collected by the authors from Tagaçaba (Guaraqueçaba, Paraná); here the lichen was found growing on tree bark.

It has a dull, pale greenish-grey thallus that covers an area up to 10 cm (4 in).

The thallus fluoresces a patchy yellow when shone with a UV light, due to the presence of lichexanthone, a secondary chemical for which the lichen is named.