Showing papers in "Protist in 2014"

TL;DR: Data on morphology, ITS/5.8S genetic distances, ITS2 compensatory base changes, mating incompatibilities, toxicity, the sxtA toxin synthesis gene, and rDNA phylogenies were consistent with each group representing a distinct cryptic species.

TL;DR: A new photosynthetic dinoflagellate species, Gambierdiscus silvae sp.

TL;DR: This marine chytridial parasitoid is described as a new genus and species, Dinomyces arenysensis, within the Dinomycetaceae fam.

TL;DR: This work describes the isolation, cultivation, as well as morphological and molecular characterization of a novel endosymbiont-harboring trypanosomatid species, Kentomonas sorsogonicus sp.

TL;DR: The results suggest a non-concerted evolution of rRNA genes in Foraminifera, and intragenomic variability in almost all species, even after excluding singleton mutations is found.

TL;DR: Molecular phylogenetics as inferred from concatenated SSU rRNA, ITS, and LSU rRNA sequence data supported the distinctiveness of the three new species of Azadinium, and none of the new species produced any known AZAs in measurable amounts.

TL;DR: The results of morphological and molecular phylogenetic analyses demonstrated that all Leishmaniinae-bound wallaceinas are just different isolates of the same species that are renamed back to Crithidia brevicula Frolov, Malysheva, 1989.

TL;DR: Characterised the chloroplast genome from an environmental coral isolate containing a symbiont belonging to the Symbiodinium sp.

TL;DR: The results of this analysis demonstrate that the genus Amphora is polyphyletic and that lineages assigned to the genus are distributed widely across the raphid diatom tree of life.

TL;DR: Molecular data analysis from a broad geographic area and host spectrum and detailed morphological documentation of the included samples provide a reliable background for the unequivocal placement of new samples into the Hemolivia/ Hepatozoon complex.

TL;DR: The Haptoria are free-living predatory ciliates living in terrestrial and aquatic habitats all around the world and the Rhynchostomatia are the best candidates for a basal litostomatean group, which well corroborates the traditional morphology-based classifications.

TL;DR: Both Parvilucifera species are generalist parasitoids with similar generation times, and this study raises the question of how two parasitoid exploiting similar ecological resources and infection strategies can coexist in the same ecosystem.

TL;DR: This identified the green endosymbionts in four obligate mixotrophic testate amoeba species belonging to three major eukaryotic clades and assigned them to a new Trebouxiophyceae taxon, TACS (Testate AmoebA Chlorella Symbionts), which suggests that photosynthetic symbionts have pre-adaptations to endOSymbiosis and colonise diverse hosts from a free-living stage.

TL;DR: It is proposed the establishment of a new genus, Nusuttodinium, to accommodate all these unarmoured kleptoplastidic dinoflagellates, which are monophyletic and characterized by distinct morphological and cytological features.

TL;DR: It is proved that the auxospores of Skeletonema marinoi were formed sexually, either by inter- or by intra-strain fertilization, either in single strains or in crosses of strains.

TL;DR: Molecular phylogeny analysis indicates that Aphelidium is very distantly related to Amoebaphelidium, highlighting the wide genetic diversity of the aphelids and support the erection of the new superphylum Opisthosporidia as sister to fungi.

TL;DR: The results suggest the morphological plasticity of testate amoebae across evolutionary time scales and that a combination of morphology and molecular analyses is needed to understand the biodiversity of these taxa.

TL;DR: No objective criteria were found for species separation in diatoms using Nitzschia palea, suggesting barcoding will need a consensual approach to molecular species limits.

TL;DR: A detailed revision of Spirostomum systematics is performed combining literature surveys, new data on hundreds of organisms and statistical and phylogenetic analyses; the results provide insights on the evolution, ecology and distribution of known morphospecies and a novel one.

TL;DR: Functional annotation of the proteome data revealed that brown algal flagellar proteins were associated with cell motility, signal transduction and various metabolic activities.

TL;DR: The findings show that COI is a promising marker for Cochliopodium, except in one case where it failed to delineate two morphologically well-defined cochliobodiums, and the taxonomic implications of these findings and factors that may confound COI as a barcode marker in CochliOPodium and other amoebae are discussed.

TL;DR: A soil species Cochliopodium plurinucleolum n.

TL;DR: In this paper, ultrastructural features of cultivated and natural populations of Ostreopsis cf. ovata from the Gulf of Naples (Mediterranean Sea) using confocal laser scanning, and scanning and transmission electron microscopy were studied.

TL;DR: Evidence is presented of some previously unreported aspects of the life cycle of an amoeba, Cochliopodium, that undergoes unusual intraspecific interactions using light microscopy and immunocytochemistry that strongly suggest that Cochliobodium is involved in parasexual activity and should no longer be considered strictly asexual.

TL;DR: Each dinoflagellate cell contains only one active nucleolus, with no hybridization signals outside it, and the rDNA organization varies among species, from repetitive clusters forming discrete nuclear organizer regions (NORs) in some to specialized "ribosomal chromosomes" in other species.

TL;DR: The results suggest that Gocevia and Endostelium should not be included in the Himatismenida and the family Goceviidae is transferred into Pellitida, a robust clade that branches deeply within Amoebozoa, among either Flabellinia, or Longamoebia, depending on taxon sampling.

TL;DR: The molecular and biochemical characterizations of a hexokinase in C. parvum suggest that CpHK and the glycolytic pathway may be explored for developing anti-cryptosporidial therapeutics.

TL;DR: The results predict that for small and medium sized protozoa maximum respiration rates should be proportional to cell volume and access to intracellular O2 is not limiting except at very low ambient O2-tensions and for large cell size.

TL;DR: From a molecular phylogenetic analysis based on 18S rRNA sequences, D. mutabilis evidently belongs to Amphitremida, Labyrinthulomycetes.

TL;DR: Molecular phylogenetic analyses of small subunit rDNA sequences derived from single-cell PCR unexpectedly demonstrated that these two gregarines are close sister species, demonstrating a compelling case of niche partitioning and associated morphological divergence in marine gregarine apicomplexans.