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The operational species concept, i.e., the one used to recognize species, is contrasted to the theoretical species concept. A phylogenetic approach to recognize fungal species based on concordance of multiple gene genealogies is compared to those based on morphology and reproductive behavior. Examples where Phylogenetic Species Recognition has been applied(More)
We report evidence for recombination in lichenized fungi based on sequenced nuclear DNA markers, judging from the incongruence of their gene genealogies. Recombining population structures were found in two phylogenetic species of Letharia, one species that is observed in nature to produce abundant sexual structures (ascomata) and another species that(More)
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