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Akashiwo sanguinea : ウィキペディア英語版 | Akashiwo sanguinea
''Akashiwo sanguinea'' is a marine dinoflagellate well known for forming blooms that result in red tides. The protist is unarmored (naked). Therefore, it lacks a thick cellulose wall, the theca, common in other genera of dinoflagellates. Reproduction of the phytoplankton species is primarily asexual. Recently recognized as mixotrophic, ''A. sanguinea'' is capable of preying on various organisms. For example, ''A. sanguinea'' is found to be capable of ingesting the cyanobacterium ''Synechococcus'' sp. at values comparable to other heterotrophic phytoplankton. This suggests implications it may have on the grazing impact of ''Synechococcus''. ==Description== Despite its lack of thecal plates, a prominent feature helpful in identifying armored flagellates, ''A. sanguinea'' is relatively large and easily recognizable. Like most dinoflagellates, one flagellum is complex, wrapping around the equator of the cell in a groove. The other flagellum extends out from the cell to help aid its movement through the water. ''A. sanguinea’s'' most prominent features are the lack of a nuclear envelope chamber and the apical groove’s large, clockwise path when viewed from the front of the cell. These features, along with observations and data from LSU rDNA sequencing, recently helped declare a new genus for this species (Hansen & Moestrup).
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