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1 September 2004 Molecular Phylogenetic Analysis Places Percolomonas cosmopolitus within Heterolobosea: Evolutionary Implications
SERGEY I. NIKOLAEV, ALEXANDRE P. MYLNIKOV, CEDRIC BERNEY, JOSE FAHRNI, JAN PAWLOWSKI, VLADIMIR V. ALESHIN, NIKOLAY B. PETROV
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Abstract

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 Vahlkampfiidae. The first Bayesian analysis of a large taxon sampling of heterolobosean SSU rRNA genes clarifies the phylogenetic relationships within this group.

SERGEY I. NIKOLAEV, ALEXANDRE P. MYLNIKOV, CEDRIC BERNEY, JOSE FAHRNI, JAN PAWLOWSKI, VLADIMIR V. ALESHIN, and NIKOLAY B. PETROV "Molecular Phylogenetic Analysis Places Percolomonas cosmopolitus within Heterolobosea: Evolutionary Implications," The Journal of Eukaryotic Microbiology 51(5), 575-581, (1 September 2004). https://doi.org/10.1111/j.1550-7408.2004.tb00294.x
Received: 31 March 2004; Accepted: 1 July 2004; Published: 1 September 2004
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