Compare Cymbella rumrichae
Compare
Cymbella affinis and Cymbella excisiformis have smaller valves, smaller length to width ratios, and a single stigma. Cymbella parva has narrowly rounded, unprotracted apices and just a single stigma. Cymbella affiniformis is smaller with narrower apices and two isolated stigmata.
LM scalebar = 10 µm
Length Range
22.1-56.6 µm
22.1-56.6 µm
Width Range
7.5-10.7 µm
7.5-10.7 µm
Striae in 10 µm
10-12 at the valve center, up to 15 near the apices
10-12 at the valve center, up to 15 near the apices
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 affiniformis
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 parva
Length Range
24.5-41.2 µm
24.5-41.2 µm
Width Range
6.9-8.9 µm
6.9-8.9 µm
Striae in 10 µm
10-12 at the valve center, up to 14 near the apices
10-12 at the valve center, up to 14 near the apices