A sourced illustration has not yet been added. This gap is included in the coverage record.

Overview

Prochnik and colleagues reported in 2010 that the studied adult colonies hold roughly 2,000 small somatic cells and about 16 large reproductive gonidia.

Its 138-megabase genome encodes around 14,500 predicted proteins, a coding capacity comparable to the unicellular relative Chlamydomonas reinhardtii. The authors linked complexity to an expanded, compartmentalized extracellular matrix and changes in lineage-specific proteins rather than many new genes.

In a 2014 experiment, Brumley and colleagues held two separate somatic cells in micropipettes. At close range their flagella beat in synchrony for thousands of cycles despite differing natural frequencies, weakening with distance; orientation changes produced in-phase or antiphase beating, showing coordination through fluid flow alone.

About 2,000 somatic cells and about 16 gonidia per studied adult colony138-megabase genome with about 14,500 predicted proteinsFlagellar synchrony between unconnected cells via hydrodynamic coupling
01

Origins & earliest records

First description is unverified. Chlamydomonas is a comparative relative, not a demonstrated direct ancestor.

02

Evidence & interpretation

Based on indexed text of Prochnik et al. 2010 (Science) and an opened repository abstract of Brumley et al. 2014 (eLife).

Selected bibliography

Documented works and useful reading. This is not a list of every appearance.

  1. 01

    Genomic Analysis of Organismal Complexity in the Multicellular Green Alga Volvox carteri

    Prochnik et al. · 2010

    Selected bibliography; Science 329:223–226, genome study.

  2. 02

    Flagellar synchronization through direct hydrodynamic interactions

    Brumley, Wan, Polin and Goldstein · 2014

    Selected bibliography; eLife 3:e02750, isolated-cell coupling experiment.

Family, evolution & connections

Taxonomic classification

A hierarchy of classified groups, not a chain of direct ancestors.

Source note: Ranked groups in the NCBI Taxonomy snapshot accessed 7 October 2026; these are not identified direct ancestors. NCBI provides a database classification rather than an independent nomenclatural authority.

  1. domainEukaryota
  2. kingdomViridiplantae
  3. phylumChlorophyta
  4. classChlorophyceae
  5. orderChlamydomonadales
  6. familyVolvocaceae
  7. genusVolvox
  8. speciesVolvox carteri

Located primary passages

Specific passages supporting details in this entry, grouped by their published witness.

Primary source witness

2010 manuscript

  1. Volvox and Chlamydomonas had similar predicted protein-coding capacities despite contrasting cellular organization. Expanded extracellular-matrix protein families and D cyclins suggested developmental innovations involving existing repertoires. Some functional roles remained hypotheses; environmental adaptation could also contribute.

    Complete main and captions 1–3; Table 1.

Detailed supplementary Methods, data, pixels and rerun unreviewed; historical draft estimates, not current complete genomes.

References

Sources supporting this profile. Linked pages have their own scope and editorial standards.

  1. Scientific paper (indexed text)Genomic Analysis of Organismal Complexity in the Multicellular Green Alga Volvox carteriResearch access: 2026-10-06
  2. Scientific paper (repository abstract)Flagellar synchronization through direct hydrodynamic interactionsResearch access: 2026-10-06
  3. Scientific classification referenceNCBI Taxonomy: Volvox carteriResearch access: 2026-10-07

Image credits

A sourced illustration has not yet been added. This gap is included in the coverage record.

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