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Descriptions Keys Photographs
Guinardia delicatula Cleve Hasle
Attheya decora West
1 other sections not shown
adjacent cells Alexandrium antapex antapical horns Apertures apical horn areolae Auxospores Balech blooms cell length cell wall Cells large Cells small central Chaetoceros chain axis Chloroplasts Chloroplasts absent Chloroplasts numerous Chloroplasts present cingulum cingulum width Cleve Cells coastal concave convex cosmopolitan curved cysts diatoms dinoflagellates discoid Distribution Ehrenberg epitheca external tubes fibulae flagella flagellates flagellum flattened gametes Genus Girdle bands Gonyaulax Gran Grunow Heterosigma hyaline Hypocone hypotheca hypothecal horns joined in straight labiate process lanceolate Lugol's iodine mucilage Neritic oceanic Paulsen pennate diatoms pervalvar axis phytoplankton plankton poroids posterior Probably cosmopolitan Pseudo-nitzschia pum in diameter pum long pum wide raphidophytes Resting spores ring rounded samples setae Setae originate short silica slightly solitary sometimes Sournia species spines striae strutted processes sulcus temperate to tropical temperate waters Terminal setae Thalassiosira Thecal plates tropical waters valve face valve mantle valve margin valve surface valve view ventral pore visible in LM