New synonyms and lectotypes in Aspicilia (Megasporaceae, Ascomycota)

The genus Aspicilia A.Massal. s.l. (Megasporaceae Pertusariales Ascomycota) has a worldwide distribution and the species are common components in the lichen vegetation on exposed rocks in a wide variety of biomes from hot deserts to Arctic tundras. The genus has a reputation of being taxonomically e...

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Bibliographic Details
Published in:Phytotaxa
Main Author: Nordin, Anders
Format: Article in Journal/Newspaper
Language:English
Published: Phytotaxa 2015
Subjects:
Online Access:http://www.mapress.com/j/pt/article/view/phytotaxa.192.3.6
https://doi.org/10.11646/phytotaxa.192.3.6
Description
Summary:The genus Aspicilia A.Massal. s.l. (Megasporaceae Pertusariales Ascomycota) has a worldwide distribution and the species are common components in the lichen vegetation on exposed rocks in a wide variety of biomes from hot deserts to Arctic tundras. The genus has a reputation of being taxonomically extremely complicated, which is partly caused by the extreme morphological variation and phenotypic plasticity of the species (Nordin 2013; Nordin et al. 2007, 2008, 2010; Owe-Larsson et al. 2008, 2011; Roux et al. 2011). The only existing taxonomic treatment of the genus with a wide scope was published by Magnusson (1939), who applied very narrow species circumscriptions in most cases. Here a number of new synonyms are presented and discussed, most of which are names introduced by Magnusson (loc. cit.), and lectotypes of Lecanora griseopallida and Sagedia laevata are designated.