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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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helictoglossa_LM.jpg
Glossary Term
Helictoglossa
Caption
Light micrograph of the footpole of
Gomphoneis olivaceum
. The helictoglossae is somewhat removed from the valve apex.
Credit
Pat Kociolek
