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Genera in a monophyletic group: The Dacrymycetales



Genera in a monophyletic group: The Dacrymycetales



Mycologia Helvetica 6(1): 35-72



The Dacrymycetales is taken as an example of a monophyletic group to explain generic concepts in the Heterobasidiomycetes. Known characters are discussed and so far proposed genera evaluated taxonomically. Phenetic and cladistic methods are used to prove the naturalness of the taxa. A key to genera is provided to test the practical applicability. General conclusions are: Profound knowledge of species characters is mandatory for the establishment of sound generic concepts. Genera should represent natural units. If the naturalness is not proved, not likely or not given, they cannot be used for phylogenetic interpretations. The delimitation of a genus is subjective, even when the claims for naturalness are strictly applied. A well founded generic concept has a key-function for identification, taxonomic and systematic groupings, as well as ecological studies. Genera should only be accepted when the descriptions include detailed analyses of differentiating characters, and adequate illustrations, at least, of the type-species.

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Accession: 008722426

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