Vagn Alstrup

Lichenopeltella cladoniarum is a species of fungus belonging to the class Dothideomycetes. It has been found growing on the podetia of Cladonia arbuscula in Bulgan district, Mongolia and Yamanashi prefecture in Japan.

Geltingia is a fungal genus in the family Helicogoniaceae. It is monotypic, containing the single lichenicolous species Geltingia associata. The genus was circumscribed in 1990 by mycologists Vagn Alstrup and David Leslie Hawksworth. The genus name honours Danish scientist Paul Gelting. It has a circumpolar distribution. It is known to grow on the lichens Ochrolechia frigida and Ochrolechia upsaliensis.

Buelliella lecanorae is a species of lichenicolous (lichen-eating) fungus in the class Dothideomycetes. It is found in a few locations in Estonia and in Crimea, where it grows parasitically on members of the Lecanora subfusca species group.

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Stellifraga is a genus of fungi in the Ascomycota phylum. The relationship of this taxon to other taxa within the phylum is unknown (incertae sedis), and it has not yet been placed with certainty into any class, order, or family. This is a monotypic genus, containing the single species Stellifraga cladoniicola.

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Sphaerellothecium gowardii is a species of lichenicolous (lichen-dwelling) fungus in the family Phyllachoraceae. It was formally described as a new species in 1998 by Vagn Alstrup and Mariette Cole. The type specimen was collected by Alstrup from the Valleyview silt cliffs in Kamloops, British Columbia, Canada at an elevation of 450 m (1,480 ft), where it was found growing on Acarospora schleicheri. The fungus is parasymbiotic (a specific type of symbiotic relationship where one organism benefits from the interaction while the other organism is neither significantly harmed nor benefited) or

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