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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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Gomphonema_semiapertum_origimag.jpg
Species
Gomphonema semiapertum
Caption
Plate 24, Figure 42. G. semiapertum Grun. Shastu (Californie) (Cleve et Möller n. 264).
