Diatoms of North AmericaDiatoms of North America
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Compare Fragilaria recapitellata

Lange-Bert. and Metzeltin 2009

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Fragilaria recapitellata is wider and has distinctly constricted, capitate ends compared to F. vaucheriae. Fragilaria perminuta also has one-sided central area, but the valves are more delicate, narrowly lanceolate and possess rostrate to sub-capitate poles.

LM scalebar = 10 µm
Fragilaria recapitellata LM7 Fragilaria recapitellata LM6 Fragilaria recapitellata LM2 Fragilaria recapitellata LM5 Fragilaria recapitellata LM1 Fragilaria recapitellata LM4 Fragilaria recapitellata LM3
Length Range
14.6-26.6 µm
Width Range
4.1-5.6 µm
Striae in 10 µm
16-20

Fragilaria vaucheriae

(Kütz.) Petersen 1938

Fragilaria vaucheriae LM2 Fragilaria vaucheriae LM4 Fragilaria vaucheriae LM5 Fragilaria vaucheriae LM3 Fragilaria vaucheriae LM1
Length Range
6–30 µm
Width Range
4-5 µm
Striae in 10 µm
14-16

Also compare to

Fragilaria perminuta

Lange-Bert. 2000