Published online by Cambridge University Press: 28 March 2007
Amandinea crassiuscula Giralt & Etayo, a new corticolous lichen species is described from the Iberian Peninsula. It is characterized by a thickly crustose to subsquamulose thallus that lacks secondary lichen compounds, lecideine apothecia, Buellia–type ascospores with rugulate ornamentation and filiform spermatia. The new species is compared with other corticolous Amandinea and Buellia species, such as A. punctata and B. chloroleuca. Habit photographs of the new species and illustrations of its thallus, spermatia and ascospores are also provided.