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. 2004 Oct 12;2(10):e306. doi: 10.1371/journal.pbio.0020306

Figure 1. Scanning Electron Micrographs of Diatoms.

Figure 1

(A) Biddulphia reticulata. The whole shell or frustule of a centric diatom showing valves and girdle bands (size bar = 10 micrometres).

(B) Diploneis sp. This picture shows two whole pennate diatom frustules in which raphes or slits, valves, and girdle bands can be seen (size bar = 10 micrometres).

(C) Eupodiscus radiatus. View of a single valve of a centric diatom (size bar = 20 micrometres)

(D) Melosira varians. The frustule of a centric diatom, showing both valves and some girdle bands (size bar = 10 micrometres).

(Images courtesy of Mary Ann Tiffany, San Diego State University.)