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Atla, a new genus in the Verrucariaceae (Verrucariales)

Published online by Cambridge University Press:  02 July 2008

Sanja SAVIĆ  and
Leif TIBELL
Sanja SAVIĆ
Affiliation:
Department of Systematic Botany, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, S-75236 Uppsala, Sweden. Email: sanja.savic@ebc.uu.se
Leif TIBELL
Affiliation:
Department of Systematic Botany, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, S-75236 Uppsala, Sweden. Email: sanja.savic@ebc.uu.se
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Abstract:

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The new genus Atla forms a well-supported clade in a molecular phylogeny based on the ITS1-5.8S-ITS2 and LSU regions of the nuclear ribosomal DNA. The genus has a crustose thallus, a hamathecium at maturity without hyphal elements except for pseudoparaphyses remaining at the ostiolum, and large, muriform spores. Atla wheldonii was previously referred to Polyblastia. Three new species, A. alpina (the type of the new genus), A. palicei and A. praetermissa, are included in the genus and described here as new to science. They were found on calcareous rocks and soil in Northern Scandinavia; A. alpina also occurs in Central Europe, and A. wheldonii likewise in Central Europe, the Pyrenées and in the British Isles. An identification key to the species and a revision of the genus are also provided.

Keywords

Ascomyceteslichensmolecular phylogenymorphologyrevision
Type
Research Article
Information
The Lichenologist , Volume 40 , Issue 4 , July 2008 , pp. 269 - 282
Copyright
Copyright British Lichen Society 2008