Compare Gogorevia rostellata
Compare
Achnanthidium exiguum has wider apices and a more narrow fascia on the raphe valve and is more widely distributed across a range of water chemistry.
Achnanthes exigua var. heterovalvata fo. angustirostrata has smaller, more squarish valves and the fascia on the raphe valve is much narrower.
The fascia on the raphe valve of this taxon prompted Krasske to describe it as a Stauroneis: Stauroneis recondita.
LM scalebar = 10 µm
Length Range
15.1-19.8 µm
15.1-19.8 µm
Width Range
6.4-7.2 µm
6.4-7.2 µm
Striae in 10 µm
30-32 near the center of the raphe valve, 24-28 near the center of the rapheless valve
30-32 near the center of the raphe valve, 24-28 near the center of the rapheless valve
Gogorevia exilis
Length Range
5-17 µm
5-17 µm
Width Range
4.5-6.2 µm
4.5-6.2 µm
Striae in 10 µm
24-34 in center of raphe valve, 20-25 in center of rapheless valve, up to 45 at apices
24-34 in center of raphe valve, 20-25 in center of rapheless valve, up to 45 at apices