Diatoms of North AmericaDiatoms of North America

Glossary

Like the rest of this website, the glossary is a work in progress. If we’ve missed a term, please contact us to let us know the term and references.

Decussate

Decussate refers to a crossing pattern of striae. The striae may cross in three directions with a transapical row and two oblique rows. The genera Decussata and Pleurosigma have decussate striae.

Citations

Decussata 004 Copy
Image Credit: Pat Kociolek
The decussate striae of Decussata. Note that the areolae give the appearance of being organized into transpical and oblique rows.
Pleurosigma
Image Credit: David Burge
The striae of Pleurosigma are characteristically decussate.
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