Compare Cymbella affiniformis
Compare
Cymbella affinis has somewhat wider, less protracted apices, only one isolated stigma, and a flat or excised ventral margin. Cymbella excisiformis has narrower valves and only one isolated stigma. Cymbella blinni valves cover a greater length range and the dorsal margin is more arched.
LM scalebar = 10 µm
Length Range
22.9-33.0 µm
22.9-33.0 µm
Width Range
7.2-9.2 µm
7.2-9.2 µm
Striae in 10 µm
10-12 dorsal, 11-13 ventral near valve center
10-12 dorsal, 11-13 ventral near valve center
Cymbella affinis
Length Range
19-36 µm
19-36 µm
Width Range
6.9-9.0 µm
6.9-9.0 µm
Striae in 10 µm
9-12 in the center valve, 13-14 at the ends
9-12 in the center valve, 13-14 at the ends
Cymbella excisiformis
Length Range
24-34 µm
24-34 µm
Width Range
6.1-7.1 µm
6.1-7.1 µm
Striae in 10 µm
9-11 in the center valve, 12-16 at the ends
9-11 in the center valve, 12-16 at the ends
Cymbella blinnii
Length Range
22.4-54.4 µm
22.4-54.4 µm
Width Range
7.6-11.4 µm
7.6-11.4 µm
Striae in 10 µm
10-14 at the valve center, 14-15 near the apices
10-14 at the valve center, 14-15 near the apices