Gyrosigma
| Gyrosigma | |
|---|---|
| |
| Gyrosigma acuminatum | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Gyrista |
| Subphylum: | Ochrophytina |
| Class: | Bacillariophyceae |
| Order: | Naviculales |
| Family: | Pleurosigmataceae |
| Genus: | Gyrosigma A.H.Hassall, 1845 |
Gyrosigma is a genus of diatoms belonging to the family Pleurosigmataceae.[1]
The genus has a cosmopolitan distribution.[1]
Like other diatoms, Gyrosigma has a siliceous cell wall called a frustule. The frustule is composed of two sections called valves, with one valve fitting inside the other valve similar to the two halves of a Petri dish.[2] Gyrosigma has valves with a central slit called a raphe, a structure that allows movement of these diatoms.[3]
The valves of Gyrosigma are sigmoid in outline, as well as the raphe. Striations could be parallel or perpendicular to the raphe. This contrasts to a similar genus Pleurosigma, which has striations that lie diagonally to the raphe.[3]
Species
[edit]![[icon]](/wiki/File:Wiki_letter_w_cropped.svg){kind=small} | This section needs expansion. You can help by adding to it. (April 2021) |
Species:[1]
- Gyrosigma acuminatum (Kützing) Rabenhorst, 1853
- Gyrosigma aestuarium Kisselev, 1925
- Gyrosigma algoris J.R.Carter, 1981
References
[edit]- ^ a b c "Gyrosigma". Global Biodiversity Information Facility. Retrieved 24 April 2021.
- ^ Kociolek, J. Patrick; Theriot, Edward C.; Williams, David M.; Julius, Matthew; Stoermer, Eugene F.; Kingston, John C. (2014). "Chapter 15. Centric and Araphid Diatoms". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN 978-0-12-385876-4.
- ^ a b Kociolek, J. Patrick; Spaulding, S. A.; Lowe, R. L. (2014). "Chapter 16. Bacillariophyceae: The Raphid Diatoms". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN 978-0-12-385876-4.
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