Diatoms of North AmericaDiatoms of North America
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Guide to Chaetoceros lauderi

Ralfs ex Lauder 1864

Chaetoceros lauderi guide2
  1. Plastids small, multiple per cell
  2. Cells rectangular (girdle view)
  3. Spines long
  4. Valves nearly circular (valve view)
  5. Resting spore primary valve elongated, with long spine(s)

Live material or preserved cells are necessary to identify this taxon. Cells have multiple small plastids confined to the main body of the cell (not located within setae). Spines (setae) are long (> 150 microns). Valves are rectangular in girdle view and nearly circular in valve view. Distinguishing this taxon requires examination of the resting spores.