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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
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Staurosirella_pinnata_gsn92019_COOK_2001_scale_5_microns_7_1039.jpg
Glossary Term
Spine
Caption
Staurosirella
has spines that are positioned in the costae, or thickened silica ridges, of the valve. These spines are hollow and forked at the tip.
Credit
Eduardo Morales