Taxonomic revision of Xanthomendoza borealis and Xanthoria mawsonii (Lecanoromycetes, Ascomycota)

• Published in: The Lichenologist
• Main Authors: LINDBLOM, Louise, SØCHTING, Ulrik
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 2008
• Subjects: Antarctic; Candelaria; The Antarctic; Antarc*
• Online Access: http://dx.doi.org/10.1017/s0024282908007937; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282908007937

Abstract: The xanthorioid taxa Xanthomendoza borealis and Xanthoria mawsonii are revised using morphological, anatomical, secondary chemical, and molecular characters. We conclude that most specimens determined as X . mawsonii from the Antarctic are conspecific with specimens labelled X . borealis from the Northern Hemisphere. Some specimens named X . mawsonii from the Antarctic are wrongly determined specimens of Xanthoria candelaria (L.) Th. Fr, including the holotype of Xanthoria mawsonii C. W. Dodge. Accordingly, Xanthoria mawsonii C. W. Dodge is a synonym to Xanthoria candelaria (L.) Th. Fr. The only available correct name for the bipolar species, which comprises material previously determined as X. borealis and X . mawsonii , and is distinct from the more widespread taxon X . candelaria , is Xanthomendoza borealis (R. Sant. & Poelt) Søchting, Kärnefelt & S. Kondratyuk.