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Issue: Vol. 459 No. 1: 9 September 2020
Type: Article
Published: 2020-09-09
DOI: 10.11646/phytotaxa.459.1.4
Page range: 39–50
Abstract views: 45
PDF downloaded: 4

Kukwaea pubescens gen. et sp. nova (Helotiales, incertae sedis), a new lichenicolous fungus on Cetraria islandica, and a key to the lichenicolous fungi occurring on Cetraria s. str.

Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu, Estonia.
Laboratory of the Systematics and Geography of Fungi, Komarov Botanical Institute of the Russian Academy of Sciences, Professor Popov St. 2, St. Petersburg, 197376, Russia.
St. Petersburg State University, Universitetskaya emb. 7–9, St. Petersburg, 199034, Russia. Laboratory of Lichenology and Bryology, Komarov Botanical Institute of the Russian Academy of Sciences, Professor Popov St. 2, St. Petersburg, 197376, Russia.
St. Petersburg State University, Universitetskaya emb. 7–9, St. Petersburg, 199034, Russia. Laboratory of Lichenology and Bryology, Komarov Botanical Institute of the Russian Academy of Sciences, Professor Popov St. 2, St. Petersburg, 197376, Russia.
St. Petersburg State University, Universitetskaya emb. 7–9, St. Petersburg, 199034, Russia. Laboratory of Lichenology and Bryology, Komarov Botanical Institute of the Russian Academy of Sciences, Professor Popov St. 2, St. Petersburg, 197376, Russia.
Institute of Botany, Nature Research Centre, Žaliųjų ežerų 49, 08406 Vilnius, Lithuania.
Ascomycota Hyaloscyphaceae s. lat. Leotiomycetes lichen-inhabiting fungi taxonomy Fungi

Abstract

A new lichenicolous genus Kukwaea is introduced for a species discovered on Cetraria islandica from coniferous forests in European and Asian parts of Russia. The new fungus is characterized by its cupulate, brown ascomata with grey to blackish disc surrounded by brownish grey hairs, exciple of textura angularis type, with crystals in the lower part, with granulose excipular hairs obtuse at the tips, simple to forked paraphyses, Calycina-type asci, and hyaline, aseptate ascospores. The DNA sequence data confirmed its placement in Helotiales, but the exact affiliation remains open. A worldwide key for lichenicolous fungi occurring on Cetraria s. str. is provided.