Heterotrophic dinoflagellate Protoperidinium sp., SEM

Heterotrophic dinoflagellate Protoperidinium sp., SEM

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Caption: Heterotrophic dinoflagellate Protoperidinium sp., coloured scanning electron micrograph (SEM). Protoperidinium species are thecate (armoured), marine planktonic, heterotrophic (non-photosynthetic) dinoflagellate. Shown here is a antapical view of a Protoperidinium species. The armoured theca (surrounding the cell; made of cellulose) is well developed. Unlike photosynthetic dinoflagellates (true algae), heterotrophic dinoflagellates (protists; protozoa) feed directly on diatoms, other dinoflagellates, prasinophytes and ciliates. Protoperidinium is a pallium feeder dinoflagellate that engulfs (ingests) its prey with a pseudopod (pallium). Prey cells are captured individually using a thin filament and are then surrounded by a membrane (the pallium) and digested completely outside the theca. There are over 40 species of Protoperidinium that are distributed worldwide in both cold and temperate seawater. Magnification: x345 when shortest axis printed at 25.

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Keywords: 29641d, alga, algae, alveolata, alveolate, alveolates, amphisoleniaceae, armoured, chemoreception, ciliate, ciliates, cingulum, colored, coloured, dinoflagellate, dinoflagellates, dinokont, dinophyceae, dinophysoid, dinophyta, diplopsaloid, electron, epitheca, epithecum, eukaryote, eukaryotic, excentricum, false-colored, false-coloured, feeder, feeders, feeding, flagella, flagellum, girdle, groove, heterotroph, heterotrophic, hypotheca, hypothecum, loricated, marine, micrograph, microzooplankton, mixotroph, mixotrophic, non-loricated, pallium, peridinioid, phagotrophic, phagotrophy, plankton, planktonic, plate, plates, protist, protista, protists, protoperidinioid, protoperidinium, protozoa, protozoan, protozoans, pseudopod, pseudopods, scanning, sea, seawater, sem, shape, shaped, sulcal, sulcus, thecal, thecate, tube, undulating, undulation, water, zooplankton

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