Phylogenetic studies in Psathyrella focusing on sections Pennatae and Spadiceae — new evidence for the paraphyly of the genus

An Investigation of the Phylogeny and Evolutionary Processes of Deliquescent Fruiting Bodies in the Mushroom Family Psathyrellaceae (Agaricales)

“…Practically, all larger clades received significant posterior probabilities under all partitioning schemes, and the topology was largely congruent with the results of other recent studies (Hopple and Vilgalys 1999;Walther et al 2005;Larsson and Örstadius 2008;Padamsee et al 2008;Vasutova et al 2008;Nagy et al 2009). …”

“…This was first evidenced by Vilgalys (1994,1999) followed by other papers (Vasutova et al, 2008;Walther et al, 2005), based on rDNA phylogeny and restriction mapping. Subsequently, the genus Coprinus was split into four genera (Redhead et al, 2001), restraining the generic name…”

“…We supplemented new sequence data with sequences from previously published phylogenies when data from at least two genes were available (Larsson and Orstadius, 2008;Nagy et al, 2009;Nagy et al, 2010a,b;Padamsee et al, 2008;Vasutova et al, 2008) for the following taxa: Psathyrella albofloccosa, Ps. atomata, Ps.…”

“…However, we used these topologies in the comparative analyses, as the putatively erroneous position of the mentioned taxa imply more conservative support for ancestral states, than would a topology on which they are basal to all other taxa of their clades. Formerly published topologies suggest that the abovementioned taxa are sister to all other species of their clades (Hopple and Vilgalys, 1999;Larsson and Orstadius, 2008;Nagy et al, 2009;Padamsee et al, 2008;Vasutova et al, 2008;Walther et al, 2005 results of the RJ-MCMC analyses should be considered more accurate as they are based on a statistically more justified procedure of sampling of models from the posterior distribution (Huelsenbeck et al, 2003;. The ML approach is also a powerful alternative in such studies, yet, in this case, model selection can be influenced by the designation of what is meant to be supported (2.00 log-likelihood units) in cases where models are not nested.…”

“…Developmental, morphological and ecological traits have been shown to be significantly convergent (Kües, 2000;Uljé, 2005;Singer, 1986;Vasutova et al, 2008). Several alternative classifications have been proposed (Redhead et al, 2001) but the gross view of two large sister groups remained intact for over two centuries (Padamsee et al, 2008).…”