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Amphidinium (am-fee-din-ee-um) glabrum Hoppenrath & Okolodkov 2000. The images show colourless cells in ventral view. The cingulum is near the anterior end of the cell and descending. The epicone is asymmetrical and the apical groove is visible. The nucleus is near the posterior end of the cell.
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The epitheca of K. glaucum is both longer and wider than the hypotheca. The cingulum is displaced by about 4-5 times.
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Togula britannica (Herdman) Flo Jorgensen, Murray et Daugbjerg 2004
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Gymnodinium (jim-no-din-ee-um), a so-called typical dinoflagellate. Most dinoflagellates have two flagella and they lie in grooves in the cell surface. The flagella are not evident here, but the grooves are. There is an circumferential groove (the girdle or cingulum) which wraps around the cell, and a longitudinal groove which extends from the point of flagellar insertion towards the back of the cell. This is an autotrophic dinoflagellate with numerous plastids with chlorophylls a and c. Also with an eyespot. Differential interference contrast.
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This is Amphidinium cf. glabrum in that it looks like but is not fully identical with the usual concept of this species.
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Togula britannica (Herdman) Flo Jorgensen, Murray et Daugbjerg 2004
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Gymnodinium (jim-no-din-ee-um), a so-called typical dinoflagellate. Most dinoflagellates have two flagella and they lie in grooves in the cell surface. The flagella are not evident here, but the grooves are. There is an circumferential groove (the girdle or cingulum) which wraps around the cell, and a longitudinal groove which extends from the point of flagellar insertion towards the back of the cell. This is an autotrophic dinoflagellate with numerous plastids with chlorophylls a and c. The nucleus is the granular structure in the lower (hypocone) part of the cell. Differential interference contrast.
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This is Amphidinium cf. glabrum in that it looks like but is not fully identical with the usual concept of this species.
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Togula britannica (Herdman) Flo Jorgensen, Murray et Daugbjerg 2004
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Gymnodinium (jim-no-din-ee-um), a so-called typical dinoflagellate. Most dinoflagellates have two flagella and they lie in grooves in the cell surface. The flagella are not evident here, but one groove -the circumferential groove - is. This is an autotrophic dinoflagellate with numerous plastids with chlorophylls a and c. The nucleus is the granular structure in the upper (epicone) part of the cell. Differential interference contrast.
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This is Amphidinium cf. glabrum in that it looks like but is not fully identical with the usual concept of this species.
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Togula britannica (Herdman) Flo Jorgensen, Murray et Daugbjerg 2004
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Gymnodinium (jim-no-din-ee-um), a so-called typical dinoflagellate. Most dinoflagellates have two flagella and they lie in grooves in the cell surface. The flagella are not evident here, but one groove -the circumferential groove - is., and the second (trailing) flagellum can be seen extending out the back of the cell. This is an autotrophic dinoflagellate with numerous plastids with chlorophylls a and c. Phase contrast.
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Togula jolla Flo Jorgensen, Murray et Daugbjerg 2004
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Togula jolla Flo Jorgensen, Murray et Daugbjerg 2004
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Gymnodinium (jim-no-din-ee-um) danicans Campbell 1973. The image shows a cell in ventral view. The red stigma is visible in the sulcal area. The plastids are yellow-brown and multiple.
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Togula jolla Flo Jorgensen, Murray et Daugbjerg 2004
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Image showing the off green colour of the chloroplasts of this dinoflagellate, the equatorial groove and the longitudinal (trailing) flagellum.
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Togula jolla Flo Jorgensen, Murray et Daugbjerg 2004
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Dinoflagelate with chloroplasts. There are two flagella, one in the groove that runs around the middle of the body and the second lies in the longitudinal groove and extends behind the swimming cell.
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Differential interference contrast micrograph of a living Gymnodinium showing the radiating strands of the chloroplast.
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Gymnodinium (Dinoflagellata) is the only genus of naked dinoflagellates found in Lake Kinneret. This genus never forms blooms but occurs quite often in small densities. Like other dinoflagellates, Gymnodinium has 2 unequal flagella, the longitudinal "whiplash" flagellum is seen in this picture, the second, transverse flagellum is hidden in the transverse groove, or cingulum.
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Gymnodinium spec. in dorsal view. Note the helical transverse flagellum running in the cingulum. The nucleus is lying in the cell centre.