Colorado River in Glen Canyon:
Symmetric Biraphid Diatoms O - Z

Pinnularia borealis Ehrenb.

Pinnularia subcapitata W. Gregory

Pinnularia cf. viridis (Nitzsch) Ehrenb.

Placoneis cf. anglophila (Lange-Bert.) Lange-Bert.

Placoneis cf. elginensis (W.Gregory) E.J.Cox

Placoneis cf. gastrum (Her.) Mereschk.

Placoneis sp. 1_16 x 4.8 um

Sellaphora cf. bacilloides (Hust.) Levkov et al.

Sellaphora bacillum (Ehrenb.) D.G.Mann

Selaphora cf. pupula (Kütz.) Mereschkowsky

Selaphora cf. stroemii (Hust.) H.Kobayasi cf.

Stauroneis cf. phoenicenteron (Nitzsch) Ehrenb.

Stauroneis smithii Grunow