# Stauridium

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Stauridium
> Markdown URL: https://mediated.wiki/source/Stauridium.md
> Source: https://en.wikipedia.org/wiki/Stauridium
> Source revision: 1336676507
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

***Stauridium*** is a [genus](/source/Genus) of [green algae](/source/Green_algae) in the family [Hydrodictyaceae](/source/Hydrodictyaceae).[2] It is very common in freshwater regions throughout the world.[3]

## Description

*Stauridium* forms flat colonies, termed [coenobia](/source/Coenobium_(morphology)), of cells in powers of two, usually four, eight, or 16. Coenobia are disc-shaped in outline, composed of cells laid contiguously next to each other with no spaces in between cells. The marginal cells are trapezoidal, with (in *[S. tetras](/source/Stauridium_tetras)*) or without (in *[S. privum](/source/Stauridium_privum))* a V-shaped incision in the middle.[3] The cell wall is smooth or covered in granules, warts, or ridges. Cells have one [chloroplast](/source/Chloroplast) filling the cell, each with a single [pyrenoid](/source/Pyrenoid).[4]

Species of *Stauridium* have thin cell walls, so they tend not to preserve well in sediments.[5]

## Taxonomy

Although *Stauridium* was first described by [August Carl Joseph Corda](/source/August_Carl_Joseph_Corda) in 1839, for most of its history it was considered to be a synonym of *[Pediastrum](/source/Pediastrum)*. In 2005, [molecular phylogenetic](/source/Molecular_phylogenetic) analyses showed that *Pediastrum* *[sensu lato](/source/Sensu_lato)* was [paraphyletic](/source/Paraphyletic) with respect to *[Hydrodictyon](/source/Hydrodictyon)*. Therefore, *Pediastrum* was split up into several genera, including *Stauridium*.[1]

## References

1. Buchheim, Mark; Buchheim, Julie; Carlson, Tracy; Braband, Anke; Hepperle, Dominik; Krienitz, Lothar; Wolf, Matthias; Hegewald, Eberhard (2005). "Phylogeny of the Hydrodictyaceae (Chlorophyceae): Inferences from rDNA Data". *Journal of Phycology*. **41** (5): 1039–1054. [doi:10.1111/j.1529-8817.2005.00129.x](https://doi.org/10.1111/j.1529-8817.2005.00129.x). [S2CID 83698514](https://api.semanticscholar.org/CorpusID:83698514)

1. See the [NCBI](/source/National_Center_for_Biotechnology_Information) [webpage on Stauridium](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=427905). Data extracted from the ["NCBI taxonomy resources"](https://ftp.ncbi.nih.gov/pub/taxonomy/). [National Center for Biotechnology Information](/source/National_Center_for_Biotechnology_Information). Retrieved 2007-03-19.

1. McManus, Hilary A. & Lewis, Louise A. (2011). "Molecular Phylogenetic Relationships in the Freshwater Family Hydrodictyaceae (Sphaeropleales, Chlorophyceae), with an Emphasis on *Pediastrum duplex*". *Journal of Phycology*. **47** (1): 152–163. [doi:10.1111/j.1529-8817.2010.00940.x](https://doi.org/10.1111/j.1529-8817.2010.00940.x). [PMID 27021721](https://pubmed.ncbi.nlm.nih.gov/27021721). [S2CID 20549311](https://api.semanticscholar.org/CorpusID:20549311)

1. Bicudo, Carlos E. M. & Menezes, Mariângela (2006). *Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições*. 2 ed. RiMa Editora. p. 508. ISBN 857656064X.

1. Komárek, Jirí & Jankovská, Vlasta (2001). *Review of the Green Algal Genus Pediastrum; Implication for Pollen-analytical Research*. Bibliotheca Phycologica. Schweizerbart Science Publishers. p. 127. ISBN 978-3-443-60035-8.

---
Adapted from the Wikipedia article [Stauridium](https://en.wikipedia.org/wiki/Stauridium) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Stauridium?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.