title: Vermistella arctica n. sp. Nominates the Genus Vermistella as a Candidate for Taxon with Bipolar Distribution.
abstract: A new amoebozoan species, Vermistella arctica n. sp., is described from marine habitats in the central part of Svalbard archipelago. This is the first report on Arctic amoebae belonging to the genus Vermistella Moran and Anderson, 2007, the type species of which was described from the opposite pole of the planet. Psychrophily proved in the new strains qualifies the genus Vermistella as a bipolar taxon. Molecular phylogenetic analyses based on 18S rDNA and actin sequences did not show any affinity of the genus Vermistella to Stygamoeba regulata ATCC(®) 50892(™) strain. A close phylogenetic relationship was found between Vermistella spp. and a sequence originating from an environmental sample from Cariaco basin, the largest marine permanently anoxic system in the world. Possible mechanisms of bipolar distribution are discussed.
authors.affiliation: Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic.|Institute of Parasitology, Biology Centre ASCR, Branišovská 31, 370 05, České Budějovice, Czech Republic.|Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic.
authors.forename: Tomáš
authors.initials: T
authors.lastname: Tyml
authors.affiliation: Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic.|Institute of Parasitology, Biology Centre ASCR, Branišovská 31, 370 05, České Budějovice, Czech Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Kostka
authors.affiliation: Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic.
authors.forename: Oleg
authors.initials: O
authors.lastname: Ditrich
authors.affiliation: Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic.
authors.forename: Iva
authors.initials: I
authors.lastname: Dyková
mesh_terms: D000199:Actins / Q000235:genetics; D000656:Amoeba / Q000235:genetics; D056894:Amoebozoa / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000648:ultrastructure; D001110:Arctic Regions; D003081:Cold Climate; D016054:DNA, Protozoan / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D016840:Lobosea; D046529:Microscopy, Electron, Transmission; D010802:Phylogeny; D058974:Phylogeography; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000469:parasitology; D013538:Svalbard
chemical_list: D000199:Actins; D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S
keywords: SSU; actin; biogeography; bipolar distribution; free-living amoebae; phylogeny; polar regions