Compare Achnanthidium deflexum
Compare
Achnanthidium deflexum can be distinguished from A. minutissimum by its broader valves, by areolae that can generally be resolved in LM, and by its strongly curved terminal raphe fissures. Achnanthidium deflexum differs from A. rivulare by its subrostrate valve ends, by areolae that can be resolved in LM, and by the presence of shortened striae usually visible in the middle portion of the valve. Achnanthidium pyrenaicum has anarrower, more lanceolate valve that is slightly asymmetrical to the apical axis. Achnanthidium gracillimum is similar to A. deflexum, but has capitate ends.
LM scalebar = 10 µm
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 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 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
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 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