Journal
NOVA HEDWIGIA
Volume 87, Issue 3-4, Pages 361-371Publisher
GEBRUDER BORNTRAEGER
DOI: 10.1127/0029-5035/2008/0087-0361
Keywords
Lepraria; Lecanora; Pilocarpaceae; Sporopodium; usnic acid; molecular systematics
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Funding
- Field Museum to HTL
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It has been suggested that the usnic acid-containing species of Lepraria do not belong to Lepraria s. str. In addition, the two usnic acid-containing Lepraria species, Lepraria usnica Sipman and Lepraria coriensis (Hue) Sipman, were suspected to be conspecific by some authors. We incorporate molecular sequence data from two independent loci to test several hypotheses regarding the conspecificity and phylogenetic position of these two taxa. The two species do not form a monophyletic clade, thereby rejecting conspecificity, but both fall outside Lepraria s. str. The placement ot L. usnica in Pilocarpaceac is well supported, while the familial placement of L. coriensis could not be determined; the species clusters with taxa outside Lecanorales s. str. This study further illustrates the polyphyly of the leprose growth form and also suggests that certain leprarioid lichens may represent sterile forms of otherwise well-known genera, such as Sporopodium in the Pilocarpaceae.
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