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Octactis
''Octactis'' is a genus of silicoflagellates, marine photosynthetic unicellular protists that take the form of either flagellates or axopodial amoebae. Described by Josef Schiller in 1925, ''Octactis'' contains various species of marine phytoplankton, some of them responsible for algal blooms that are toxic to fish. Characteristics ''Octactis'' species are unicellular protists that appear as several different multinucleate forms (i.e. with multiple nuclei). The most prevalent form is as amoebae surrounded by an external, basket-like siliceous skeleton, consisting of two conspicuous rings: a smaller apical ring supported by short struts that are attached to a larger basal ring. The skeleton pikes sometimes occur on the surface of the basal ring. The large window that the apical ring encloses is undivided. Other forms also present are naked amoebae and sometimes mucocyst-bearing amoebae. Both skeleton-bearing and naked cells present a long flagellum. The mucocysts appe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octactis Speculum
''Octactis'' is a genus of silicoflagellates, marine life, marine photosynthetic unicellular protists that take the form of either flagellates or axopodial amoebae. Described by Josef Schiller in 1925, ''Octactis'' contains various species of marine phytoplankton, some of them responsible for algal blooms that are toxic to fish. Characteristics ''Octactis'' species are unicellular protists that appear as several different multinucleate forms (i.e. with multiple cell nucleus, nuclei). The most prevalent form is as amoebae surrounded by an external, basket-like Protist shell#Silicon-based shells, siliceous skeleton, consisting of two conspicuous rings: a smaller apical ring supported by short struts that are attached to a larger basal ring. The skeleton pikes sometimes occur on the surface of the basal ring. The large window that the apical ring encloses is undivided. Other forms also present are naked amoebae and sometimes mucocyst-bearing amoebae. Both skeleton-bearing and n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |