Molecular Phylogeny and Taxonomy of Centrohelid Heliozoans
Summary
Centrohelid heliozoans constitute a group of spherical, axopodial protists characterised by radiating microtubule-supported projections and siliceous scales. Molecular approaches, especially analyses of small subunit ribosomal RNA genes, have revolutionised their taxonomy and illuminated deep evolutionary relationships. Recent work has clarified the monophyly of major lineages such as the Raphidocystidae and Pterocystidae, revealing patterns of scale evolution and adaptive radiations across freshwater, brackish and marine environments. Integrating ultrastructural data with gene sequences has resolved longstanding taxonomic ambiguities, demonstrating that morphological convergence is widespread and that scale morphology alone may obscure phylogenetic affinities. These insights refine our understanding of centrohelid diversity, biogeography and ecological roles in microbial food webs, particularly their interactions with cyanobacteria and other picoplankton. Advances in high-throughput sequencing and environmental sampling continue to uncover cryptic diversity, underscoring the global significance of centrohelid heliozoans in nutrient cycles and as indicators of aquatic ecosystem health.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Molecular Phylogeny and Taxonomy of Centrohelid Heliozoans publication trend
The graph below shows the total number of articles in molecular phylogeny and taxonomy of centrohelid heliozoans across all publications each year (not limited to Nature Index journals).
Technical terms
Molecular phylogeny: The study of evolutionary relationships among organisms using molecular sequence data.
Taxonomy: The science of defining and naming groups of biological organisms based on shared characteristics.
18S rRNA (SSU rRNA): A component of the small subunit ribosomal RNA commonly used in reconstructing eukaryotic phylogenies.
Heliozoans: A group of protists with radiating axopodia used for feeding and locomotion.
Centrohelids: A lineage of heliozoan protists distinguished by siliceous scales or spines covering the cell surface.
Clade: A group of organisms believed to comprise all the evolutionary descendants of a common ancestor.
References
- Morphology and phylogeny of the centrohelid heliozoans Raphidocystidae and their ability to consume cyanobacteria. PLOS ONE (2025).
- Triangulopteris lacunata gen. et sp. nov. (Centroplasthelida), a New Centrohelid Heliozoan from Soil †. Diversity (2021).
- Two new brackish-water species of centrohelid heliozoans (Haptista: Centroplasthelida), Choanocystis mylnikovi sp. n. and C. punctata sp. n., from Russia. Protistology (2022).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.