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Genus: Guinardia | Diatom Common West Coast species: G. striata, G. delicatula Family: Rhizosoleniaceae
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Description: Cylindrical cells that form straight, curving and sometimes spiraling chains. Valves flat but with rounded edges. External process is marginal, and fits into a shallow depression in adjoining valve. Girdle bands appear as collars but hard to see. Small numerous chloroplasts. Cell Size: Width 5-45um, Length 250um Distribution: Neritic, widespread, probably cosmopolitan. Synonym: Guinardia striata = Rhizosolenia stolterfothii
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