Clauzadeana Cl.Roux
Type : Clauzadeana macula (Taylor) Coppins & Rambold [Lecidea macula Taylor]
Description : Thallus crustose, superficial. Prothallus black. Photobiont green, Trebouxia -like, 11–15 μm diam. Medulla I−. Ascomata apothecia, immersed in thallus areolae, aspicilioid; the photobiont cells extending below the hymenium and into the excipular tissues. Thalline exciple not raised, ±colourless. Hymenium I+ blue; epithecium brownish to bluish green, N+ purple-red. Hypothecium ±colourless. Hamathecium of richly branched and anastomosing paraphyses, composed of short, irregularly shaped cells, not swollen or capitate. Asci broadly clavate of Lecanora -type (Malcolm & Galloway 1997: 186). Ascospores ellipsoidal, simple, colourless, without a distinct perispore.
Clauzadeana is a monospecific genus in the family Lecanoraceae (Kirk et al. 2001; Eriksson et al. 2004; Pennycook & Galloway 2004; Eriksson 2005; Hertel & Nash 2004). It was created to accommodate a species that differed from Lecidea in several microscopic characters, viz.: the ramified paraphyses; the ascus structure (Lecanora -type); and the presence of photobiont cells in the exciple tissue and below the hymenium.
