Nearly 3,000 species of fungi are known to occur in Iceland. Approximately one-third are either lichen-forming fungi or fungi living on lichens (lichenicolous fungi). There are around 770 species of Basidiomycota in Iceland. Known Ascomycota species in Iceland number around 960, including the anamorphic fungi. Smaller numbers of species have been found in Iceland belonging to other groups (i.e. Blastocladiomycota (9), Olpidiomycota (6), Entomophthoromycota (18), Zoopagomycota (1), Mucoromycota (41), and Chytridiomycota (83).
Checklist of Icelandic Fungi I. Microfungi. Helgi Hallgrímsson and Guðríður Gyða Eyjólfsdóttir 2004. Fjölrit Náttúrufræðistofnunar No. 45. 189 pp. In Icelandic with English summary.
Aquatic fungi of Iceland. Biflagellate species. T.W. Johnson, Jr. 1974. Acta Naturalia Islandica 23. 40 pp.
Aquatic fungi of Iceland: Uniflagellate species. T.W. Johnson, Jr. 1973. Acta Naturalia Islandica 22. 38 pp.