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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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proximal_raphe.jpg
Glossary Term
Proximal raphe
Caption
Scanning electron micrograph of
Gomphonema
. The arrows show the external proximal raphe ends. The raphe is not deflected or dilated. External raphe fissures are absent.
Credit
Sarah Spaulding
