Compare Eunotia serra
Compare
Eunotia diadema has a constant number of 6 dorsal undulations. A specimen of E. serra with 6 undulations may be distinguished from E. diadema by having shallower undulations and a tendency for the terminal undulations to coalesce with the apices. Eunotia tetraodon and Eunotia triodon have 4 and 3 dorsal undulations, respectively.
LM scalebar = 10 µm
Length Range
60-134 µm
60-134 µm
Width Range
18-24 µm
18-24 µm
Striae in 10 µm
9-13 in the valve center, 14-19 near the apices
9-13 in the valve center, 14-19 near the apices
Eunotia diadema
Length Range
34-65 µm
34-65 µm
Width Range
14-26 µm
14-26 µm
Striae in 10 µm
7-10 in the valve center, 12-17 near the apices
7-10 in the valve center, 12-17 near the apices
Eunotia tetraodon
Length Range
37-51 µm
37-51 µm
Width Range
14.2-18.8 µm
14.2-18.8 µm
Striae in 10 µm
8-10 in the valve center, 12-15 at the apices
8-10 in the valve center, 12-15 at the apices
Eunotia triodon
Length Range
47-74 µm
47-74 µm
Width Range
15-23 µm
15-23 µm
Striae in 10 µm
15-18 near valve center, 19-21 near the ends
15-18 near valve center, 19-21 near the ends