What question did this study set out to answer?

Resolve the evolutionary position of amoeboid protists historically classified as Heliozoa and assess molecular evidence for the proposed eukaryotic supergroup Rhizaria.

May 17, 2004Proceedings of the National Academy of SciencesOpen Access

The twilight of Heliozoa and rise of Rhizaria, an emerging supergroup of amoeboid eukaryotes

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Authors

SNSergey I. NikolaevUniversity of Geneva CBCédric BerneyUniversity of Geneva JFJosé F. FahrniUniversité Claude Bernard Lyon 1

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Implication

Molecular phylogenetic analysis reveals heliozoan polyphyly and validates the Rhizaria supergroup in amoeboid eukaryotes, suggesting major revisions to early eukaryotic evolution.

Key Points

Resolve the evolutionary position of amoeboid protists historically classified as Heliozoa and assess molecular evidence for the proposed eukaryotic supergroup Rhizaria.
Sequenced and combined small-subunit ribosomal RNA (SSU rRNA) and actin genes from three major heliozoan lineages (Actinophryida, Centrohelida, and Desmothoracida), Sticholonche, and polycystine radiolarians.
Performed molecular phylogenetic analyses to reconstruct evolutionary relationships between these amoeboid taxa and other major eukaryotic groups.
Heliozoans are polyphyletic, with Centrohelida representing an independent eukaryotic lineage, Actinophryida placing within stramenopiles, and Desmothoracida nesting within cercozoans.
Phylogenetic trees provide strong support for Rhizaria as an expansive amoeboid supergroup uniting desmothoracids, radiolarians, Sticholonche, foraminiferans, and related amoebae and flagellates.

Cite This Study

Nikolaev et al. (2004) studied this question.

synapsesocial.com/papers/69dd4c715ea84e5556101192 https://doi.org/10.1073/pnas.0308602101

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Implication

Molecular phylogenetic analysis reveals heliozoan polyphyly and validates the Rhizaria supergroup in amoeboid eukaryotes, suggesting major revisions to early eukaryotic evolution.

The twilight of Heliozoa and rise of Rhizaria, an emerging supergroup of amoeboid eukaryotes

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Implication

Key Points

Cite This Study

The twilight of Heliozoa and rise of Rhizaria, an emerging supergroup of amoeboid eukaryotes

Discussion

Member takes

Implication

Key Points

Cite This Study

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