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Four new species of Verrucaria from calcareous rocks in Finland

Published online by Cambridge University Press:  18 January 2017

Juha PYKÄLÄ
Affiliation:
Finnish Environment Institute, Natural Environment Centre, 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-00014 University of Helsinki, Finland
Leena MYLLYS
Affiliation:
Botanical Museum, Finnish Museum of Natural History, P.O. Box 7, FI-00014 University of Helsinki, Finland
Corresponding
E-mail address:

Abstract

Four new species of Verrucaria are described from calcareous rocks in Finland based on morphology and ITS sequences. Verrucaria lapponica sp. nov. differs from V. cincta by the smaller perithecia, thinner periphysoids and occasional occurrence of pale exciple walls. Verrucaria sublapponica sp. nov. is related to V. lapponica but differs by a shorter involucrellum and larger spores. Verrucaria saanaensis sp. nov. differs from V. nuoljae (H. Magn.) comb. ined. by having larger spores and a fimbriate prothallus. Verrucaria othmarbreussii sp. nov. is closely related to V. tenebrica, but differs by the paler and thinner, less areolate thallus. The four species belong to the Staurothele group based on the BLAST search and the ITS phylogeny. All four species are rare in Finland and all except V. othmarbreussii seem to have a narrow ecogeographical niche on calcareous mountains above the tree line. Lichens restricted to these habitats may be especially sensitive to climate warming.

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Articles
Copyright
© British Lichen Society, 2017 

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