The only member of the lichen genus Dermiscellum, D. catawbensis, has been found to be synonymous with a name published over a decade earlier by Edward Tuckerman. Thus, in order to correct this case of forgotten priority, Opegrapha oulocheila Tuckerman is placed in the genus Dermiscellum to replace the name D. catawbense. The typification of both names is discussed and the holotype of O. oulocheila is figured for the first time.
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Vol. 106 • No. 2