The new species Lecanora lasalliae Pérez-Ortega & Etayo is described from Spain. It is included provisionally in Lecanora s. lat as characters such as Lecanora-type ascus, exciple composed of thick radiating hyphae and the usual presence of algal cells in the excipulum or its lichenicolous habitus on Lasallia pustulata, do not fit well within any known genus of lichenicolous or lichenized fungi. Its taxonomic affinities with several taxa are discussed, including the parasitic Lecanora gyrophorina.
