Guide to Achnanthidium reimeri
Credit: Marina Potapova
- Valves with subrostrate or subcapitate apices
- Valve width 3.5-5.5 µm
- Central area rhomboid in rapheless valve
- Central area rectangular or transversely elliptical in raphe valve
Valves are linear-elliptical or linear-lanceolate with subrostrate or subcapitate ends. The striae are uniseriate. The striae are radiate in the center of the valves and parallel near the ends. The central area is rhomboid in the rapheless valve and rectangular or transversely elliptical in the raphe valve. The valve width is 3.5-5.5 µm.