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Comprehensive taxon sampling reveals unaccounted diversity and morphological plasticity in a group of dimitic polypores (Polyporales, Basidiomycota)

Journal article
Authors Otto Miettinen
Ellen Larsson
Elisabet Sjökvist
Karl-Henrik Larsson
Published in Cladistics
Volume 28
Issue 3
Pages 251-270
ISSN 1096-0031
Publication year 2012
Published at Department of Biological and Environmental Sciences
Pages 251-270
Language en
Links dx.doi.org/10.1111/j.1096-0031.2011...
Keywords 'Basidiomycetes, Polyporales, taxonomy, phylogeny, molecular systematics,species diversity'
Subject categories Biological Sciences, Morphology, Biological Systematics

Abstract

The phylogeny of the poroid and hydnoid genera Antrodia, Junghuhnia, and Steccherinum (Polyporales, Basidiomycota) was studied utilizing sequences of the gene regions ITS, nLSU, mtSSU, atp6, rpb2 and tef1. Altogether 148 taxa, represented by 549 sequences, were included in analyses. Results show that most species of these genera form a well supported clade in the Polyporales, called Steccherinaceae, along with 12 other hydnoid and poroid genera. Within the Steccherinaceae, generic concepts need to be revised: no fewer that 15 genera are needed to accommodate existing and new species. At least 16 transitions have taken place between poroid and hydnoid hymenophore types within Steccherinaceae, and similar plasticity can be seen in microscopic characters. Nevertheless, natural genera revealed in the analysis can mostly be characterized morphologically and, with few exceptions, poroid and hydnoid species belong to separate genera. The genus Steccherinaceae in shown to contain both hydnoid and poroid species. Species of the former Antrodiella belong to at least 10 genera within Steccherinaceae.

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