Abstract
Pseudocyphellaria holarctica McCune, Lucking & Moncada was recently described as having a North American and Russian Far East distribution, based on specimens collected from eastern Asia, Alaska and Oregon. However, the single sequence representing a collection from Oregon in this study actually was from a specimen collected in Alaska. To clarify the range of this species we obtained ITS sequences for all specimens identified as P. holarctica from Oregon examined in the original study, as well as 23 putative P. hawaiiensis collections from Oregon. Analysis of ITS regions of these specimens indicated that all were assignable to P. hawaiiensis rather than to P. holarctica. No specimens of P. holarctica are known from Oregon, California or Washington.
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