The algicolous and lichenicolous species Psammina filamentosa is described from the Netherlands and the UK, and is characterized by long (generally over 50 μm) and somewhat tapered conidial arms. Psammina filamentosa is compared with other Psammina specimens found in the same habitat, growing on algae or lichens on the dry side of trees and stones. Psammina filamentosa, P. inflata and P. stipitata differ in the dimensions of their conidial arms. Psammina simplex, however, may be a synonym of P. stipitata, and a DNA study is needed to determine whether it is a distinct species or developing material of P. stipitata. Psammina inflata is also reported as new for the Netherlands. A new worldwide key to the 10 species of Psammina currently known is provided, including three species described from plant material.

During 2010–12 collecting seasons, we visited 27 islands, locally called keys, in Florida Bay within the boundaries of Everglades National Park for the purpose of investigating their lichen flora. A disproportionate number of the resultant collections belong to Enterographa Fée, a genus mostly tropical in distribution. Currently, 11 species are known from Everglades National Park, of which Enterographa bradleyana, E. caudata, E. murrayana and E. nitidula are described here as new to science. Enterographa bradleyana is superificially similar to Enterographa divergens but has smaller ascospores, a wider perispore and contains gyrophoric acid. Enterographa candata is easily identified by an unusual chemistry of lichexanthone and schizopeltic acid and its extremely long tailed ascospores. Enterographa murrayana resembles E. anguinella in the field but has a different chemistry, wider ascospores with more septation and a wider perispore. Enterographa nitidula has an unusual fine powdery and glossy thallus, small 4-celled ascospores and contains an unidentified substance. Because a large number of Enterographa have been described (20 including those newly described here) since Sparrius monographed the genus in 2004, an updated world key to the genus is provided.

The new fungus Cercidospora alpina is described from Sweden where it grows on the thallus of the crustose lichen Stereocaulon cumulatum. The ecology and distribution of the new species as well as its morphological similarities to related species are discussed. A key to the known species of Cercidospora occurring in Fennoscandia is provided.

The new lichenicolous species Lichenostigma supertegentis is described from Sweden and Norway where it grows on thalli and apothecia of Aspicilia supertegens. The ecology and distribution of the new species are discussed and a distribution map is provided. The concept of Lichenostigma is enlarged to accommodate fungi producing macroconidia.