Compare Achnanthidium minutissimum
Compare
Achnanthidium minutissimum is distinguished from other monoraphid diatoms by its small size, linear-lanceolate shape, and radiate striae. The breadth of the valve is narrower than both Rossithidium pusillum and Achnanthidium eutrophilum. Rossithidium kreigeri has an asymmetric central area on the raphe valves. Achnanthidium atomus is broader relative to the length. Achnanthidium gracillimum has rostrate ends.
LM scalebar = 10 µm
Length Range
5.6-20.8 µm
5.6-20.8 µm
Width Range
1.5-3.3 µm
1.5-3.3 µm
Striae in 10 µm
25-35
25-35
Achnanthidium eutrophilum
Length Range
5.4-17.8 µm
5.4-17.8 µm
Width Range
2.1-4.0 µm
2.1-4.0 µm
Striae in 10 µm
25-35 in the middle of raphe valve
25-35 in the middle of raphe valve
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
Achnanthidium atomus
Length Range
9.9-21 µm
9.9-21 µm
Width Range
3-3.5 µm
3-3.5 µm
Striae in 10 µm
28-30 in raphe valve, 22-25 in rapheless valve
28-30 in raphe valve, 22-25 in rapheless valve
Achnanthidium gracillimum
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