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A taxonomic revision of Caloplaca herbidella and C. furfuracea

Published online by Cambridge University Press:  06 August 2009

Ulf ARUP  and
Elin ÅKELIUS
Ulf ARUP
Affiliation:
Botanical Museum, Lund University, Östra Vallgatan 18, SE-223 61 Lund, Sweden.
Elin ÅKELIUS
Affiliation:
Botanical Museum, Lund University, Östra Vallgatan 18, SE-223 61 Lund, Sweden.
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Abstract

Caloplaca herbidella (Hue) H. Magn. and C. furfuracea H. Magn. are two isidiate, epiphytic species in the large genus Caloplaca. Caloplaca herbidella in a strict sense is normally grey and fertile with thick, somewhat coralloid isidia, but orange, sterile forms with thin isidia also occur. Caloplaca furfuracea is superficially similar morphologically to C. herbidella s. str. but has thinner, more granular isidia and generally a darker grey colour. Doubts have been raised as to whether C. furfuracea should be acknowledged as a proper species or incorporated in C. herbidella. Using morphometric methods and molecular analysis of the nrITS DNA gene we show that C. herbidella and C. furfuracea are two clearly separated species. Furthermore, the mainly sterile, orange form of C. herbidella can be regarded as a separate species that is here described as C. coralliza Arup & Åkelius. All three species are described in detail, including photographs and notes on their ecology. Finally, new distribution maps for Europe show that C. herbidella and C. coralliza are widespread in Europe, but the latter is probably less common than the former. Caloplaca furfuracea is clearly very rare in Europe with only few collections from Switzerland and Sweden, but seems to be more common in North America.

Keywords

Caloplaca corallizaDNAEuropeisidiateITSlichenmolecular
Type
Research Article
Information
The Lichenologist , Volume 41 , Issue 5 , September 2009 , pp. 465 - 480
Copyright
Copyright © British Lichen Society 2009

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