Dictyochales
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The silicoflagellates are a small group of unicellular photosynthetic protists, or algae, belonging to the supergroup of eukaryotes known as Stramenopiles. They behave as phytoplankton and are present
Dictyocha speculum
Stramenopile
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The stramenopiles, also called heterokonts, are protists distinguished by the presence of stiff tripartite external hairs. In most species, the hairs are attached to flagella, in some they are attache
Dictyochales
…silicoflagellates (order Dictyochales) are a small group of unicellular photosynthetic protists, or algae, belonging to the supergroup of eukaryotes known as Stramenopiles. They behave as phytoplankton and are present in oceanic waters. They are well known from harmful algal blooms that cause high mortality of fish…
Electron micrograph of the protist Paraphysomonas butcheri. It illustrates the stramenopile property of having stiff hairs. The hairs attach to one longer flagellum, the other is without hairs. The body is coated with delicate scales. Paraphysomonas feeds on bacteria, two of which lie near the hairy flagellum.
Two living C. roenbergensis. Light micrograph. The cells are about 6 µm long. The anterior flagellum beats with an undulating pattern, the posterior (recurrent or smooth) flagellum usually holds the cell to the substrate.
Giant kelp, Macrocystis pyrifera, an example of a multicellular stramenopile, is a large seaweed, up to 45 metres (150 feet) long, in the Phaeophyceae, within the Gyrista.