Molecular and morphological characterization of four new ancyromonad genera and proposal for an updated taxonomy of the Ancyromonadida.

Autor: Yubuki N; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., Torruella G; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., Galindo LJ; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., Heiss AA; Department of Invertebrate Zoology, American Museum of Natural History, New York City, New York, USA.; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan., Ciobanu MC; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., Shiratori T; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan., Ishida KI; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan., Blaz J; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., Kim E; Department of Invertebrate Zoology, American Museum of Natural History, New York City, New York, USA., Moreira D; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., López-García P; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France., Eme L; Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France.
Jazyk: angličtina
Zdroj: The Journal of eukaryotic microbiology [J Eukaryot Microbiol] 2023 Nov-Dec; Vol. 70 (6), pp. e12997. Date of Electronic Publication: 2023 Aug 22.
DOI: 10.1111/jeu.12997
Abstrakt: Ancyromonads are small biflagellated protists with a bean-shaped morphology. They are cosmopolitan in marine, freshwater, and soil environments, where they attach to surfaces while feeding on bacteria. These poorly known grazers stand out by their uncertain phylogenetic position in the tree of eukaryotes, forming a deep-branching "orphan" lineage that is considered key to a better understanding of the early evolution of eukaryotes. Despite their ecological and evolutionary interest, only limited knowledge exists about their true diversity. Here, we aimed to characterize ancyromonads better by integrating environmental surveys with behavioral observation and description of cell morphology, for which sample isolation and culturing are indispensable. We studied 18 ancyromonad strains, including 14 new isolates and seven new species. We described three new and genetically divergent genera: Caraotamonas, Nyramonas, and Olneymonas, together encompassing four species. The remaining three new species belong to the already-known genera Fabomonas and Ancyromonas. We also raised Striomonas, formerly a subgenus of Nutomonas, to full genus status, on morphological and phylogenetic grounds. We studied the morphology of diverse ancyromonads under light and electron microscopy and carried out molecular phylogenetic analyses, also including 18S rRNA gene sequences from several environmental surveys. Based on these analyses, we have updated the taxonomy of Ancyromonadida.
(© 2023 The Authors. Journal of Eukaryotic Microbiology published by Wiley Periodicals LLC on behalf of International Society of Protistologists.)
Databáze: MEDLINE
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