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The twilight of Heliozoa and rise of Rhizaria: a molecular revolution in the phylogeny of amoeboid protistsтезисы доклада
- Авторы: Nikolaev S.I., Berney C., Fahrni J., Bolivar I., Polet S., Mylnikov A.P., Aleshin V.V., Petrov N.B., Pawlowski J.
- Сборник: Europ. J. Biochem. Abstracts in: Proceedings of 29 th FEBS Congress
- Том: 27
- Тезисы
- Год издания: 2004
- Первая страница: 29
- Последняя страница: 29
- Аннотация: Recent molecular phylogenetic studies revealed the extraordinary diversity of single-celled eukaryotes. However, the proper assessment of this diversity and accurate reconstruction of the eukaryote phylogeny are still impeded by the lack of molecular data for some major groups of easily identifiable and cultivable protists. Among them, amoeboid eukaryotes have been notably absent from molecular phylogenies, in spite of their diversity, complexity and abundance. To partly fill this phylogenetic gap, we present here the first multigene (smallsubunit ribosomal RNA and/or actin) sequence data for the three main groups of Heliozoa (Actinophryida, Centrohelida, Desmothoracida), the heliozoanlike Sticholonche, and the radiolarian group Polycystinea. Phylogenetic analyses of our sequences demonstrate the polyphyly of heliozoans, which branch either as an independent eukaryotic lineage (Centrohelida), or within stramenopiles (Actinophryida), or among cercozoans (Desmothoracida), in broad agreement with previous ultrastructure-based studies. Our data also provide the first multigene evidence for the existence of the Rhizaria, a new supergroup of mainly amoeboid eukaryotes which includes desmothoracid heliozoans, all radiolarians, Sticholonche, foraminiferans, as well as various filose and reticulose amoebae and some flagellates.
- Добавил в систему: Петров Николай Борисович