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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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What are diatoms?
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CG-8-iii-11-005-crop.jpg
Glossary Term
Porte-crayon
Caption
Apex of
Frustulia rexii
(LM). Longitudinal ribs fuse to form a prominent porte-crayon. Scale bar = 10 µm.
Credit
Carrie Graeff
