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Verrucaria ahtii, V. oulankaensis and V. vitikainenii, three new species from the Endocarpon group (Verrucariaceae, lichenized Ascomycota)

Published online by Cambridge University Press:  10 March 2017

Juha PYKÄLÄ ,
Annina LAUNIS  and
Leena MYLLYS
Juha PYKÄLÄ
Affiliation:
Natural Environment Centre, Finnish Environment Institute, P. O. Box 140, FI-00251 Helsinki, Finland. Email: juha.pykala@ymparisto.fi
Annina LAUNIS
Affiliation:
Botanical Museum, Finnish Museum of Natural History, P.O. Box 7, FI-00014University of Helsinki, Finland
Leena MYLLYS
Affiliation:
Botanical Museum, Finnish Museum of Natural History, P.O. Box 7, FI-00014University of Helsinki, Finland
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Abstract

Three new species of Verrucaria are described from calcareous and calciferous rocks in Finland based on morphology and ITS sequences. The species are all members of the Endocarpon group in the Verrucariaceae. Verrucaria oulankaensis sp. nov. is related to V. cernaensis but differing in its usually pruinose, small areolate thallus. It occurs in NE Finland on calcareous and calciferous rocks on river shores. Verrucaria ahtii sp. nov. and V. vitikainenii sp. nov. form a sister group in the ITS phylogeny. Verrucaria vitikainenii differs from V. ahtii in the darker and thinner thallus, absence of a prothallus and in the perithecia, which lack thalline cover. Verrucaria ahtii morphologically resembles V. apomelaena but differs in having a thinner involucrellum and a fimbriate prothallus. It has a southern distribution in Finland and prefers sun-exposed sites, particularly pebbles in lime quarries. The species is also reported from Lithuania and Russia. Verrucaria vitikainenii has an eastern distribution in Finland. The species is a strict calcicole, preferring half-shady habitats. Verrucaria apomelaena is excluded from the Finnish lichen flora.

Keywords

calcareous rocksFinlandITSlichensLithuaniaRussiataxonomy
Type
Articles
Information
The Lichenologist , Volume 49 , Issue 2 , March 2017 , pp. 107 - 116
Copyright
© British Lichen Society, 2017 

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