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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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helictoglossae_int.jpg
Glossary Term
Helictoglossa
Caption
SEM of the footpole of
Gomphoneis geitleri
, showing the internal view. The distal raphe terminates in the raised and thickened helictoglossa.
Credit
Marina Potapova
