Gyrosigma
| Gyrosigma | |
|---|---|
| Gyrosigma acuminatum | |
| Scientific classification | |
| Domain: | Eukaryota |
| Clade: | Sar |
| Clade: | Stramenopiles |
| Phylum: | Ochrophyta |
| Clade: | Diatomeae |
| Class: | Bacillariophyceae |
| Order: | Naviculales |
| Family: | Pleurosigmataceae |
| Genus: | 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
Species:[1]
- Gyrosigma acuminatum (Kützing) Rabenhorst, 1853
- Gyrosigma aestuarium Kisselev, 1925
- Gyrosigma algoris J.R.Carter, 1981
- Gyrosigma angulatum (Quekett) Griffith & Henfrey
- Gyrosigma apula Rabenhorst, 1853
- Gyrosigma arcticum (Cleve) Cleve, 1894
- Gyrosigma attenuatum (Kützing) Rabenhorst, 1853
- Gyrosigma baculum W.E.Herwig & F.A.S.Sterrenburg, 2014
- Gyrosigma baicalense
- Gyrosigma baikalensis Skvortzov, 1937
- Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853
- Gyrosigma beaufortianum Hustedt, 1955
- Gyrosigma bhusavalensis Sarode & Kamat, 1984
- Gyrosigma bigibbum Zanon, 1949
- Gyrosigma caffra Giffen, 1963
- Gyrosigma calaritanum Zanon, 1948
- Gyrosigma cali G.Reid, 2003
- Gyrosigma centropunctatum Yuhang Li, Nagumo & Kuidong Xu, 2020
- Gyrosigma coelophilum Okamoto & Nagumo, 2003
- Gyrosigma compactum (Greville) Cleve, 1894
- Gyrosigma constrictum Volkov, 1936
- Gyrosigma contortum Mereschkowsky, 1902
- Gyrosigma crassum Meister, 1934
- Gyrosigma curtum E.Reichardt, 2020
- Gyrosigma curvulum Rabenhorst, 1853
- Gyrosigma cuspidata Rabenhorst, 1853
- Gyrosigma diaphanum Cleve, 1894
- Gyrosigma diminutum (W.Smith) Cleve
- Gyrosigma dissimilis Y.A.Mikishin, 1991
- Gyrosigma distortoides Manguin, 1952
- Gyrosigma diversitatum Giffen, 1970
- Gyrosigma dongzhaiense Yuhang Li, Nagumo & Kuidong Xu, 2020
- Gyrosigma dubia Rabenhorst, 1853
- Gyrosigma dubium Meister, 1934
References
- ^ 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.