Heliozoa
| Sun animalcules | |
|---|---|
| |
| Heliozoan depicted by Louis Joblot, 1718 | |
| Scientific classification (obsolete) | |
| Domain: | Eukaryota |
| Phylum: | Sarcodina |
| Class: | |
| Order: | Heliozoa Haeckel , 1866 |
Heliozoa, commonly known as sun-animalcules, are microbial
freshwater and marine
environments.
Classification
Originally the heliozoa were treated together as a formal taxon Heliozoa or Heliozoea, with the rank of class or phylum, but it has been realised that they are
polyphyletic
, as the various orders show notable differences and are no longer believed to be descended from a single common ancestor. Instead, "heliozoa" is regarded as a descriptive term applying to various lines of protists.
The primary groups include:[5]
- Stramenopiles)
- Centrohelida (some support for Hacrobia)
- )
- )
Several
nucleariids
were once considered heliozoa, but they do not have microtubule-supported axopods and so are now considered filose amoeboids instead.
Phylogeny
The heliozoa are a
Eukaryotes
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References
External links
Wikispecies has information related to Heliozoa.
- Actinosphaerium (single-celled) is an example of a heliozoa. For an image see http://www.microscopy-uk.org.uk/index.html?http://www.microscopy-uk.org.uk/ponddip/
- . Encyclopædia Britannica (11th ed.). 1911.