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Pertusaria pseudocorallina
Nomenclature
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Family: PertusariaceaeGenus: Pertusaria
SUMMARY
Thallus rather thick, greyish white with a variable brownish tinge, ± smooth, wrinkled to coarsely warted, irregularly rimose. Prothallus black, sometimes conspicuous at the margins. Isidia usually present, 0.5-1 mm diam., scattered to crowded, several per areole, rounded, often constricted at the base, apices brown-pigmented, rounded, often breaking off at the base leaving non-sorediate, crater-like depressions. When fertile, thallus warted, irregularly granular, often appearing eroded, without or with only a few isidia.
Anamorph: no information available.
Teleomorph: fertile warts scattered or crowded, 1-3 mm diam., rather rare, irregularly semi-globose, with 2-7 apothecia. Discs punctiform, grey-black. Asci 2-spored. Ascospores 120-200 × 50-80 μm, aseptate, hyaline, the wall 5-6 μm thick, uniform, smooth, without an epispore, gelatinous sheath or appendages.
Chemistry: thallus C–, K+ yellow-red, KC+ yellow-red, Pd+ yellow, UV– (norstictic acid and accessory substances).