Compare Eunotia bidens
Eunotia bidens is similar in shape and dimensions to E. richbuttensis; however, E. bidens valves have a lower areola density, ventral undulations, and subcapitate ends. While similar in shape to E. superbidens, valves of E. bidens differ by smaller breadth at the valve center and ends. In contrast to E. praerupta, E. bidens has more narrow valves and a higher stria density. Eunotia diodon is similarly biundulate on the dorsal margin, but E. bidens differs by less valve curvature and a lower areola density.
LM scalebar = 10 µm
Length Range
46.7-60.0 µm
46.7-60.0 µm
Width Range
at the valve center: 8.5-10.5 µm
at the valve center: 8.5-10.5 µm
Striae in 10 µm
9-12 in the valve center, 12-15 at the ends
9-12 in the valve center, 12-15 at the ends
Length Range
20-59 µm
20-59 µm
Width Range
7.3-9.9 µm
7.3-9.9 µm
Striae in 10 µm
10-14 at the center of the valve, 12-16 at the ends
10-14 at the center of the valve, 12-16 at the ends
Length Range
23.3-111.2 µm
23.3-111.2 µm
Width Range
at the valve center: 11.4-16.7 µm
at the valve center: 11.4-16.7 µm
Striae in 10 µm
7-11 in the valve center, 12-14 at the ends.
7-11 in the valve center, 12-14 at the ends.
