Angiactis is a genus of crustose lichens of uncertain familial placement in the order Arthoniales. It has four species.
The genus was circumscribed in 2008 by lichenologists André Aptroot and Laurens Sparrius, with Angiactis littoralis assigned as the type species. This lichen was originally described as a species of Lecanographa by Gintaras Kantvilas. The genus name Angiactis derives from the Greek Greek, Modern (1453-);: αγγείο ("receptacle") and Greek, Modern (1453-);: αὐτός ("shaped"), and refers to the thalline excipulum that covers the fruiting bodies.
Angiactis species have a thalline exciple (rim), but lack a cortex. Their asci are of the Grumulosa-type, and the ascospores are hyaline, with thick walls. The excipulum is carbonized (blackened) and does not have any reaction with a KOH solution.
, Species Fungorum (in the Catalogue of Life) accepts four species of Angiactis: