Lecanora sorediomarginata Rodrigues, Terrón & Elix sp. nov., described as new to science from Portugal, is characterized morphologically by a crustose whitish-grey to greenish thallus developing soralia from small, marginal warts and chemically by the presence of 3, [minor], and usnic acid [trace]. It is chemically similar to L. lividocinerea, to which it shows phylogenetic affinities based on ITS rDNA sequence analysis, and to L. sulphurella. Lecanora sorediomarginata is epiphytic on Pinus pinaster and P. pinea, in pine forests on sand dunes along the Portuguese coast.

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Healthy thalli of Parmelia sulcata Taylor were transplanted to 8 localities in the surroundings of a power station (La Robla, León, Spain), the sole pollution source in the region. Changes in chlorophyll a fluorescence were monitored in the transplants 12 months, 18 months and 24 months after transplantation. Statistically significant differences were observed in the ratio of variable to maximal fluorescence, non-photochemical fluorescence quenching and vitality index. The decrease in fluorescence parameters was higher in the localities of Cuadros and Rabanal de Fenar, which are situated a few kilometres away from the power station and in the same direction as the prevailing winds.

Abstract.As a result of a field trip organised by the Spanish Lichen Society in Serranía de Ronda, south Spain, a catalogue of 360 taxa is presented (336 lichens, 24 lichenicolous fungi). The list includes three new records for the Iberian Peninsula: Arthonia paretinaria, Micarea myriocarpa and Niesslia keissleri, 51new ones for the Autonomous Andalusian Community, and three and 81 new ones for the province of Cádiz and of Málaga, respectively. After these results, the total updated number of the province of Málaga rises to 556 lichens and lichenicolous fungi. The best represented lichen genus is Cladonia (18) with the most species, unlike Lecanora (15), Pertusaria (12), Physconia (12) and Collema (9). As regard habitat, most lichen species are mainly corticolous (55%), as opposed to saxicolous (24%), terricolous (14%) as the species growing on other lichens as lichenicolous fungi (7%). The percentages of lichen growth forms are mainly foliose (50%) and crustose (31%), while fruticose (7%), crustose squamulose (6%) and dimorphic (6%) are less represented. The lichen with a green photobiont (Chlorophyta 84%) predominates, while the cyanobacteria photobiont (15%) is less represented. Keywords: new records; Arthonia; Micarea; Niesslia.[es] Líquenes y hongos liquenícolas de la Serranía de Ronda (Málaga-Cádiz), sur de España Resumen. Como resultado de la exploración llevada a cabo por la Sociedad Española de Liquenología en la Serranía de Ronda, sur de España, se presenta un catálogo de 360 taxones (336 líquenes y 24 hongos liquenícolas). La lista incluye tres nuevas citas para la Península Ibérica: Arthonia paretinaria, Micarea myriocarpa y Niesslia keissleri, 51 nuevas para la Comunidad Autónoma de Andalucía, 3 nuevas para la provincia de Cádiz y 81 para la de Málaga. Con estos resultados el número total de líquenes y hongos liquenícolas para la provincia de Málaga asciende a 556. Los géneros con mayor número de especies son Cladonia (18) con el número de especies más alto, Lecanora (15), Pertusaria (12), Physconia (12) y Collema (9). En relación al hábitat las especies corticícolas son las más abundantes (55%) seguido por saxícolas (24%), terrícolas (14%) y las que viven sobre los líquenes como hongos liquenícolas (7%). Respecto a los porcentajes de formas de crecimiento, la mayoría de los líquenes tienen biotipo foliáceo (50%) y crustáceo (31%), mientras que los talos fruticulosos (7%), escuamulosos (6%) y dimórficos (6 %) están menos representados. Predominan los líquenes con Chlorophyta como fotobionte (84%) mientras que las cianobacterias (15%) están muy poco representadas.