Ingaderia sorediata (Sparrius, P. James & M.A. Allen) Ertz = Roccellographa circumscripta (Taylor) Ertz & Tehler morpho sorediata ss. auct. fr.

    Thallus crustose, more or less circular up to 5 cm in diameter, can form mosaics, relatively thick 0.2-0.3 mm, smooth to finely warty and finely pruinose (sometimes with a networked pruin), whitish to light gray a slightly bluish in very dark areas, a little very pale yellowish in more lit areas, bordered by a large, blackish prothallus, thallus covered with soralia of irregular sizes of 0.5-2 mm, pale blue-gray sometimes arranged in a network. Very rare apothecia, immersed in the thallus, rounded or elongated in lirella. Hyaline spores becoming brownish, fusiform (4) 6-8 septate, 20-35 x 5-7 µm. C- (attention sometimes yellow due to Trentepohlia photobiont when the thallus surface is eroded), K+ pale yellow, KC -, P+ yellow, golden yellow, UV+ creme. Characteristic species of the poorly lit overhangs of the acidic rocks of the xeric supralittoral zone and the aerohaline zone, also in the crevices of the shady walls along the seaside.