Compare Achnanthidium gracillimum
Compare
Achnanthidium gracillimum differs from A. pyrenaicum, and A. latecephalum by narrowly rostrate or subcapitate apices. A. gracillimum differs from A. minutissimum by parallel striae throughout both valves, 21-25 in 10 μm at the valve center.
LM scalebar = 10 µm
Length Range
12-21 µm
12-21 µm
Width Range
3.0-3.7 µm
3.0-3.7 µm
Striae in 10 µm
21-25 in the center valve, 36-45 at the valve ends
21-25 in the center valve, 36-45 at the valve ends
Achnanthidium laticephalum
Length Range
10-16 µm
10-16 µm
Width Range
3.5-3.9 µm
3.5-3.9 µm
Striae in 10 µm
20-26 in the center valve, 35-40 at the ends
20-26 in the center valve, 35-40 at the ends
Achnanthidium pyrenaicum
Length Range
10–16 µm
10–16 µm
Width Range
2.5-4.0 µm
2.5-4.0 µm
Striae in 10 µm
20-25 in the center, 34-40 at the raphe valve ends; 20-28 in the center, 32-38 at the rapheless valve ends
20-25 in the center, 34-40 at the raphe valve ends; 20-28 in the center, 32-38 at the rapheless valve ends