Acanthothecis norstictica
Acanthothecis norstictica is a species of corticolous lichen in the family Graphidaceae. Found in Brazil, it was formally described as a new species in 2022 by André Aptroot, Robert Lücking, and Marcela Eugenia da Silva Cáceres. The type specimen was collected from a farm near Itaguatins, where it was found growing on tree bark in cerrado. The lichen contains norstictic acid, the presence of which is referred to in the specific epithet norstictica.