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G. delicatula cells are cylindrica, with flat valves. Each cell as a spine extending from the valve margin. This spine fits into a depression on the adjacent cell to form chains. Few but large chromatophores are present usually at the cell periphery. This species can form large blooms in the spring and early summer
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D. fragilissimus forms loosely connected chains. The cells bear processes on the valve end which fit into depressions on the adjacent cell. It is often found together with Leptocylindrus danicus and Guinardia delicatula
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Rhizosolenia (rye-so-lean-ee-a). Diatoms are algae which live in little glass boxes or frustules - rather like little petri dishes. Centric diatom, elongate shape with terminal spines. Phase contrast.
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Rhizosolenia (rye-so-so-lean-ee-ah) a elongated marine diatom, ends of frustules with spines, very common in the water column. Phase contrast.
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Rhizosolenia (rye-so-so-lean-ee-a) setigera, one of the common genera of marine phytoplantkonic diatoms, a centric diatom in which the valves, at the ends of the cells, are conical and give rise to spines. Much of the long cylindrical body is enclosed with hoop-shaped girdle bands. Phase contrast microscopy.
data on this strain.
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Rhizosolenia (rye-so-so-lean-ee-a) setigera, one of the common genera of marine phytoplantkonic diatoms, a centric diatom in which the valves, at the ends of the cells, are conical and give rise to spines. Much of the long cylindrical body is enclosed with hoop-shaped girdle bands. This image shows the plastids and the valve region of the cell. Differential interference microscopy.
data on this strain.
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Rhizosolenia (rye-so-so-lean-ee-a) setigera, one of the common genera of marine phytoplantkonic diatoms, a centric diatom in which the valves, at the ends of the cells, are conical and give rise to spines. Much of the long cylindrical body is enclosed with hoop-shaped girdle bands. Phase contrast microscopy.
data on this strain.
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Cells are conical with long processes, otaria are absent. Diameter: 5-50 microns. R. setigera is a cold water species, which can occur throughout the year.
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G. flaccida is larger than G. delicatula (diameter 42-90 microns). The cells have very distinctive star shaped chromatophores
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Cells are united into curved chains via a spine on the valve margin which fits into a depression on the adjacent cell. This species is cosmopolitan
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Cells are crescent or s-shaped, valve diameter: 48-400 microns.
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Valves are cylindrical terminating in a proboscis. Processes are absent. This is a temprate, coastal species.
