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Degelia cyanoloma (Schaer.) H. H. Blom & L. Lindblom comb. et stat. nov., a distinct species from western Europe

Published online by Cambridge University Press:  26 November 2009

Hans H. BLOM  and
Louise LINDBLOM
Hans H. BLOM
Affiliation:
The Norwegian Forest and Landscape Institute, Fanaflaten 4, N-5244 Fana, Norway. Email: hans.blom@skogoglandskap.no
Louise LINDBLOM
Affiliation:
Department of Biology & Museum of Natural History, University of Bergen, P.O. Box 7800, N-5020 Bergen, Norway.
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Abstract

Degelia cyanoloma (Schaer.) H. H. Blom & L. Lindblom is resurrected from synonymy and elevated from varietal rank to species. The taxon was earlier referred to D. plumbea (Lightf.) P. M. Jørg. & P. James, however, several discontinuous character states distinguish the two species. Degelia cyanoloma is characterized morphologically by having a large thallus that is pale greyish when dry, lobes that are composed of consecutive trough-shaped segments with an upper surface without squamules, no isidia or soredia, and apothecia discs that are dark reddish brown to blackish. Degelia cyanoloma has a euoceanic distribution and is known from western Europe (Norway, France, Great Britain, Ireland, Portugal, Spain). Based on results from studies of morphology, we hypothesize that D. atlantica (Degel.) P. M. Jørg. & P. James is the closest relative of D. cyanoloma among the European species of the genus whereas D. plumbea is closely related to D. ligulata P. M. Jørg. & P. James.

Keywords

lichen-forming ascomycetesLobarion communityPannariaceaetaxonomy
Type
Research Article
Information
The Lichenologist , Volume 42 , Issue 1 , January 2010 , pp. 23 - 27
Copyright
Copyright © British Lichen Society 2009

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