Compare Achnanthidium rosenstockii
Compare
Achanthidium reimeri has a larger central area on the raphe valve and an elliptic central area on the rapheless valve. In addition, A. reimeri has striae that become more dense toward the apices. Psammothidium didymum has a central constriction and rounded apices.
LM scalebar = 10 µm
Length Range
9.6-11.4 µm
9.6-11.4 µm
Width Range
3.4-4.1 µm
3.4-4.1 µm
Striae in 10 µm
24-26 in the center valve, 26-28 at the ends.
24-26 in the center valve, 26-28 at the ends.
Achnanthidium reimeri
Length Range
11.5-18.2 µm
11.5-18.2 µm
Width Range
3.5-4.5 µm
3.5-4.5 µm
Striae in 10 µm
26-29 in the center valve
26-29 in the center valve
Psammothidium didymum
Length Range
6-9 µm
6-9 µm
Width Range
3.3-4.2 µm
3.3-4.2 µm
Striae in 10 µm
28-32 on raphe valve, 25-28 on rapheless valve
28-32 on raphe valve, 25-28 on rapheless valve