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• W2170976136 abstract "Molecular phylogenies are being published increasingly and many biologists rely on the most recent topologies. However, different phylogenetic trees often contain conflicting results and contradict significant background data. Not knowing how reliable traditional knowledge is, a crucial question concerns the quality of newly produced molecular data. The information content of DNA alignments is rarely discussed, as quality statements are mostly restricted to the statistical support of clades. Here we present a case study of a recently published mollusk phylogeny that contains surprising groupings, based on five genes and 108 species, and we apply new or rarely used tools for the analysis of the information content of alignments and for the filtering of noise (masking of random-like alignment regions, split decomposition, phylogenetic networks, quartet mapping).The data are very fragmentary and contain contaminations. We show that that signal-like patterns in the data set are conflicting and partly not distinct and that the reported strong support for a rather surprising result (monoplacophorans and chitons form a monophylum Serialia) does not exist at the level of primary homologies. Split-decomposition, quartet mapping and neighbornet analyses reveal conflicting nucleotide patterns and lack of distinct phylogenetic signal for the deeper phylogeny of mollusks.Even though currently a majority of molecular phylogenies are being justified with reference to the 'statistical' support of clades in tree topologies, this confidence seems to be unfounded. Contradictions between phylogenies based on different analyses are already a strong indication of unnoticed pitfalls. The use of tree-independent tools for exploratory analyses of data quality is highly recommended. Concerning the new mollusk phylogeny more convincing evidence is needed." @default.
• W2170976136 created "2016-06-24" @default.
• W2170976136 creator A5024532549 @default.
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• W2170976136 date "2009-01-01" @default.
• W2170976136 modified "2023-10-02" @default.
• W2170976136 title "Phylogenetic support values are not necessarily informative: the case of the Serialia hypothesis (a mollusk phylogeny)" @default.
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• W2170976136 doi "https://doi.org/10.1186/1742-9994-6-12" @default.
• W2170976136 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2710323" @default.
• W2170976136 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19555513" @default.
• W2170976136 hasPublicationYear "2009" @default.
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