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 |