Compare Achnanthidium pyrenaicum
Compare
Achnanthidium pyrenaicum can be distiguished from A. minutissimum by its wider lanceolate valves and by the strongly curved terminal raphe fissures. Achnanthidium deflexum is broader in the center and ends than A. pyrenacium. The valve ends are capitate in A. gracillimum and subrostrate in A. pyrenaicum.
LM scalebar = 10 µm
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 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 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
