A classification of living and fossil dinoflagellates.
Classification Although classified as eukaryotes, the dinoflagellate nuclei lack some key features of eukaryotic nuclei. In fact, Dodge termed the dinoflagellate nucleus as mesokaryotic, due to its possession of intermediate characteristics between the coiled DNA areas of prokaryotic bacteria and the well-defined eukaryotic nucleus.
Indeed, the term dinoflagellate means whirling flagella. Typically, there are two flagella. One of these circles around the body of the cell, often lying in a groove called the cingulum. The other flagellum sticks outward from the surface of the cell. Both flagella are inserted into the dinoflagellate at the same point. The arrangement of the flagella can cause the organism to move in a spiral.
Red tide may look like a sea of blood, but it is actually a result of the rapid accumulation of a certain species of dinoflagellate. When this species appears in large numbers, it can cause the water to take on a reddish tinge. It is important not to consume seafood from an area which has experienced a red tide. This is because the dinoflagellate can release toxins into the water which can.
For additional information: For an excellent summary of modern dinoflagellates, click here for Andrew MacRae's Dinoflagellates page at the University of Calgary. You can also try the Protist Image Data Base for information about the dinoflagellate genus Peridinium.Or read Jeff Shield's page on Parasitic dinoflagellates of crustaceans. For a fuller listing of on-line phycological collections.
Dinoflagellates are not only important marine primary producers and grazers, but also the major causative agents of harmful algal blooms. It has been reported that many dinoflagellate species can produce various natural toxins. These toxins can be extremely toxic and many of them are effective at far lower dosages than conventional chemical agents. Consumption of seafood contaminated by algal.
A checklist and classification of the extant dinoflagellates are given. Dinokaryotic dinoflagellates (including Noctilucales) comprised 2,294 species belonging to 238 genera. Dinoflagellates sensu.
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