Diatoms of North AmericaDiatoms of North America
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Compare Epithemia musculus

Kütz. 1844

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Valves of Epithemia gibba are longer and straighter. Valves of Epithemia gibberula are less arched and narrower.

LM scalebar = 10 µm
Rhopalodia musculus LM1 Rhopalodia musculus LM4 Rhopalodia musculus LM5 Rhopalodia musculus LM3 Rhopalodia musculus LM2
Length Range
12-60 µm
Width Range
10-16 µm
Striae in 10 µm
14-18

Epithemia gibba

Ehrenb. (Kütz.) 1844

Rhopalodia gibba LM7 Rhopalodia gibba LM4 Rhopalodia gibba LM5 Rhopalodia gibba LM6 Rhopalodia gibba LM3 Rhopalodia gibba LM1 Rhopalodia gibba LM2
Length Range
75-205 µm
Width Range
8-11 µm
Striae in 10 µm
12-16

Epithemia gibberula

(Ehrenb.) Kütz. 1844

Rhopalodia gibberula LM13 Rhopalodia gibberula LM12 Rhopalodia gibberula LM11 Rhopalodia gibberula LM8 Rhopalodia gibberula LM10 Rhopalodia gibberula LM9
Length Range
26.5-42.5 µm
Width Range
5-9.5 µm
Striae in 10 µm
12-23 (ventral)