Compare Achnanthidium druartii
Compare
Achnanthidium druartii differs from similar species A. deflexum and A. alpestre by the lanceolate shape of the valve and the large difference in stria density in the valve center, as compared to the valve ends. Achnanthidium pyrenaicum and A. eutrophilum can be easily distinguished from A. druartii by their smaller size range. Achnanthidium rivulare is distinguished by its linear-elliptical valve outline.
LM scalebar = 10 µm
Length Range
14-25 µm
14-25 µm
Width Range
4.1-5.3 µm
4.1-5.3 µm
Striae in 10 µm
15-20 in 10 µm in the center valve, 40-50 in 10 µm at the ends of raphe valve, 25-35 in 10 µm at the ends of rapheless valve
15-20 in 10 µm in the center valve, 40-50 in 10 µm at the ends of raphe valve, 25-35 in 10 µm at the ends of rapheless valve
Achnanthidium deflexum
Length Range
7.4-28.3 µm
7.4-28.3 µm
Width Range
3.1-5.3 µm
3.1-5.3 µm
Striae in 10 µm
15-28 in the middle of raphe valve
15-28 in the middle of raphe valve
Achnanthidium alpestre
Length Range
10.3-20.4 µm
10.3-20.4 µm
Width Range
3.7-4.4 µm
3.7-4.4 µm
Striae in 10 µm
24-28 in the center of raphe valve, 26-32 in the center of rapheless valve, 35-42 at the ends
24-28 in the center of raphe valve, 26-32 in the center of rapheless valve, 35-42 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
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 rivulare
Length Range
5.4-23.8 µm
5.4-23.8 µm
Width Range
2.6-4.4 µm
2.6-4.4 µm
Striae in 10 µm
19-25 in the middle of raphe valve, 19-28 in the middle of the rapheless valve
19-25 in the middle of raphe valve, 19-28 in the middle of the rapheless valve