Lithodesmium sp.

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Taxonomic Group:Diatom
Trophic Status:Autotrophic
Size Range:35-68 μm wide (Cupp 1943); 17-74 μm wide, depending upon species (Tomas 1997)
Key Characteristics:Cells united in usually long straight chains with concealed apertures; valves three cornered and with marginal pervalvar directed membrane by which adjacent cells are joined; long thin hollow spine in center of valve; numerous small chloroplasts
Confused With:
Toxin:None known