金藻(学名:Chrysophyta[1]),群体生活,约有1500种,外观呈金黄褐色,光合色素包含叶绿素A、C、胡萝卜素、叶黄素、褐藻素[2],以昆布多糖(Laminarin,一种β1-3葡萄糖聚合物)为主要碳水化合物贮存形式,鞭毛为顶生,有1或2根鞭毛。细胞壁为含硅质的胶质复合物,大多生活于淡水。当环境变化或恶劣时,会产生囊胞来渡过该时期。在前寒武纪岩层中有发现。仅有金藻纲(Chrysophyceae)一个纲。
下级分类
本纲包括以下几个目:
- 金胞藻目(Chrysomonadales)
- 根金藻目(Rhizochrysidales)
- 金囊藻目(Chrysocapsales)
- 金球藻目(Chrysosphaerales)
- 金枝藻目(Phaeothamniales)
- 金藻纲包括以下几个目:
- 变形藻属 Chloramoebales
- 色金藻目 Chromulinales
- Chrysamoebidales
- 金囊藻目 Chrysocapsales
- 金球藻目 Chrysosphaerales
- Heterogloeales
- 蛰居金藻目 Hibberdiales
- 水树藻目 Hydrurales
- Ochromonadales
- Parmales
- 根金藻目 Rhizochrysidales
- Synurales
- Thallochrysidales
- 目的地位未定的科:
- Apoikiaceae
- Archaeomonadaceae
- Aurosphaeraceae
- Chrysosaccaceae
- Lepidochromonadaceae
- Segregatospumellaceae
- 目和科的地位未定的科:
- Ambrosicysta Srivastava & Binda, 1984
- Aurantiella R.Chodat, 1925
- Bitrichia Wolłosz.
- Bolboforma Daniels & Spiegler, 1974
- Bullasphaera Licari, 1978
- Clathromonas J.M.Scoble & T.Cavalier-Smith, 2014
- Gilsonichrysis Kufferath, 1950
- Gloeourceolus Z.X.Shi, 1998
- Lithochrysites V.P.Maslov, 1964
- Margaritum H.Moreira Filho, 1968
- Melurnicysta Srivastava & Binda, 1984
- Myxochrysis Pascher, 1916
- Pelagococcus
- Peltomonas Vlk, 1941
- Phanulithus Wind & Wise, 1977
- Randersenia K.H.Nicholls, 2013
- Silicocapsa Lemmermann, 1899
- Sporranicysta Srivastava & Binda, 1984
- Stylomonas Korshikov, 1926
- Umbilicimonas Srivastava & Binda, 1984
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