Biology:Gyrosigma
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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
- ↑ 1.0 1.1 1.2 "Gyrosigma". Species. GBIF. http://www.gbif.org/species/7826612.
- ↑ Kociolek, J. Patrick; Theriot, Edward C.; Williams, David M.; Julius, Matthew; Stoermer, Eugene F.; Kingston, John C. (2014). "Chapter 15. Centric and Araphid Diatoms". Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc.. ISBN 978-0-12-385876-4.
- ↑ 3.0 3.1 Kociolek, J. Patrick; Spaulding, S. A.; Lowe, R. L. (2014). "Chapter 16. Bacillariophyceae: The Raphid Diatoms". Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc.. ISBN 978-0-12-385876-4.
Wikidata ☰ Q1558520 entry
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