Synura
''Synura'' is a genus of colonial chrysomonad algae covered in silica Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is o ... scales. It is the most conspicuous genus of the order Synurales. Classification The present taxonomy recognizes five sections: *Section Peterseniae **'' S. americana'' **'' S. australiensis'' **'' S. borealis'' **'' S. conopea'' **'' S. glabra'' **'' S. heteropora'' **'' S. hibernica'' **'' S. laticarina'' **'' S. longisquama'' **'' S. macracantha'' **'' S. macropora'' **'' S. petersenii'' *Section Spinosae **'' S. curtispina'' **'' S. mollispina'' **'' S. nygaardii'' **'' S. sphagnicola'' **'' S. spinosa'' *Section Echinulatae **'' S. biseriata'' **'' S. echinulata'' **'' S. leptorrhabda'' **'' S. mammillosa'' **'' S. multidentata'' *Section Splendidae **'' S. ...
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