| Tribonema vulgare; cells with H-shaped tranverse septa (arrowheads). Each cell has several lens-shaped chloroplasts, which is in contrast to Microspora and Binuclearia, two genera of algae which also have H-shaped transverse septa separating the cells, but have a single chloroplast. | 
									
									
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										| Tribonema vulgare; crop of the above image. | 
									
									
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										| Tribonema vulgare; focus on the chloroplasts. The number of chloroplasts of this species is >4 per cell. | 
									
									
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										| Location: Witten, Gebiet Hammerteich, wall of sandstone | 
									
									
										| Habitat: puddle in sandstone | 
									
									
									  | Date: 25.10.2011 | 
								  
									
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