110 taxa of lichens and lichenicolous fungi have been recorded in "El Montecillo" park, Ablitas, Navarra, noted for its gypsicolous lichen flora. Three species are newly described: Arthonia squamarinae and Sphaerellothecium episquamarinae on Squamarina lentigera and Syspastospora cladoniae on Cladonia convoluta. The three are known also from Aragón. Sphaerellothecium reticulatum is proposed as a new combination, and the genus Echinothecium synonimized with Sphaerellothecium. Coniochaeta ligniaria is recorded for the first time as lichenicolous. Didymellopsis perigena is a new record from the Iberian Peninsula and 19 species are new from Navarra province: Arthonia galactinaria, Buellia zoharyi, Caloplaca coronata, C. flavocitrina, Cercidospora crozalsiana, C. epidesertorum, Intralichen lichenicola, Lecania rabenhorstii, Lichenochora verrucicola, Lichenostigma epipolina, Llimoniella scabridula, Neofuscelia glabrans, Rinodina guzzinii, R. lecanorina, Stigmidium squamariae, Thyrea girardii, Verrucaria compacta, V. sphaerospora and Xanthoria calcicola.