Athallia itiana

About

Flavoplaca itiana is a species of saxicolous (rock-dwelling) crustose lichen in the family Teloschistaceae. It has a thin, whitish crust that is often largely embedded in the rock, with yellow-orange to orange fruiting bodies typically 0.2–0.8 mm across. The species is known only from calcareous sandstone cliffs along the English Channel coast in the Boulonnais region of northern France, where it forms distinct zones just above the black Hydropunctaria maura belt. It closely resembles the Mediterranean species Flavoplaca navasiana but differs in having larger spores and occupying a higher position in the coastal zonation. The species was originally described as Caloplaca itiana in 2009 and transferred to Flavoplaca in 2023.

Summary from Wikipedia