Lecanora subcarnea

Thallus continuous and finely cracked to areolate, clearly delimited, areoles often uneven in height, ± flat, margins crenulate, white or pale grey or pale yellow to yellowish grey, surface coarsely granular to warted; prothallus white, fibrous, generally well-developed. Apothecia (0.2–) 0.4–1 (–1.7) mm diam., aggregated, immersed to sessile and finally constricted below; thalline margin entire, concolorous with or tending to become paler than the thallus, excluded with age; disc pink- to pale grey-brown, convex to almost subglobose, usually densely white or blue-white pruinose; epithecium brown, granular; hymenium 35–55 µm tall; paraphyses 1.5–2 µm diam., unbranched or sparsely branched especially near the tips, apices to 3.5 µm diam., generally with the terminal cell subglobose. Ascospores (8–) 10–14 × (5–) 6–8 µm. Thallus C–, K+ yellow, Pd+ orange→red, UV– (atranorin, chloratranorin, protocetraric acid).

A member of the L. subfusca group in its broad sense, but in a separate clade from the L. subfusca group s. str. with Lecanora albella (Ivanovich-Hichins et al, 2025) but a new genus has not yet been named. Confused with Lecanora ochroidea, which differs in the K+ yellow-red (crystals) reaction due to presence of norstictic acid and the UV+ pale orange fluorescence and is mainly restricted to lowland coastal rocks, but can be found on rocks in oceanic woods. Also likely to be confused with Glaucomaria swartzii, which often shares the same habitat but is C+ orange.