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Molecular Phylogenetic Analysis Places Percolomonas cosmopolites within Heterolobosea: Evolutionary Implications
Author(s) -
NIKOLAEV SERGEY I.,
MYLNIKOV ALEXANDRE P.,
BERNEY CEDRIC,
FAHRNI JOSE,
PAWLOWSKI JAN,
ALESHIN VLADIMIR V.,
PETROV NIKOLAY B.
Publication year - 2004
Publication title -
journal of eukaryotic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 1066-5234
DOI - 10.1111/j.1550-7408.2004.tb00294.x
Subject(s) - biology , phylogenetic tree , ribosomal rna , evolutionary biology , phylogenetics , genetics , gene , taxon , 18s ribosomal rna , flagellate , ecology , paleontology
Percolomonas cosmopolitus is a common free‐living flagellate of uncertain phylogenetic position that was placed within the Heterolobosea on the basis of ultrastructure studies. To test the relationship between Percolomonas and Heterolobosea, we analysed the primary structure of the actin and small‐subunit ribosomal RNA (SSU rRNA) genes of P. cosmopolitus as well as the predicted secondary structure of the SSU rRNA. Percolomonas shares common secondary structure patterns of the SSU rRNA with heterolobosean taxa, which, together with the results of actin gene analysis, confirms that it is closely related to Heterolobosea. Phylogenetic reconstructions based on the sequences of the SSU rRNA gene suggest Percolomonas belongs to the family Vahlkampliidae. The first Bayesian analysis of a large taxon sampling of heterolobosean SSU rRNA genes clarifies the phylogenetic relationships within this group.