Colorado River in Glen Canyon:
Monoraphid Diatoms

Achnanthidium cf. affine_5-images

Achnanthidium cf. druartii Rimet and Coute

Achnanthidium cf. gracillimum (Meister) Lange-Bert.

Achnanthidium cf.minutissimum (Kütz.) Czarn.

Achnanthidium cf. rosenstockii (Lange-Bert.) Lange-Bert.

Cocconeis disculus (Schumann) Cleve

Cocconeis cf. neodiminuta Krammer

Cocconeis pediculus Ehrenb.

Cocconeis placentula Ehrenb. s.l.

Cocconeis cf. placentula var. lineata (Ehrenberg) van Heurck

Eucocconeis flexella (Kütz.) F.Meister

Karayevia clevei clevei (Grunow) Bukhti.

Karayevia ploenensis var. gessneri (Hust.) Bukht.

Planothdium delicatulum (Kütz.) Round & Bukht.

Planothidium frequentissimum (Lange-Bert.) Lange-Bert.