Gomphonema acuminatum is a common benthic (epilithic) species, at times present also in plankton at the littoral of Lake Kinneret. Forming stalked colonies. Cells heteropolar in valve view and cuneate (having one wider and one narrower pole) in girdle view. Attached to the substratum by colorless stalks secreted from the narrower pole. Single H-shaped plastid with a central pyrenoid against one girdle side. Widespread in circumneutral to slightly alkaline waters, sensitive to pollution greater than oligo-beta-mesosaprobic.
aalster and tzohary
A Alster & T Zohary, Kinneret Limnological Laboratory
Photo taken with an Olympus BX50 Microscope equipped with DIC optics and PixeLink digital camera, mag. X40