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Welcome to the Diatom Image Database! The Periphyton Group at Florida International University created and maintains the Diatom Image Database, which includes over 980 diatom taxa found in the greater Everglades region of south Florida. Please send questions or comments about the Diatom Image Database to Franco Tobias .

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Map of south Florida Loxahatchee (LOX) WCA 2A WCA 3A Biscayne Bay Shark River Slough (SRS) Taylor Slough (TS) Florida Bay Everglades National Park (ENP) Everglades National Park (ENP)

Petroneis plagiostoma

Petroneis plagiostoma

(Grunow in Cleve & Moller) Mann in Round et al.
Witkowski et al. (2000):"Iconographia Diatomologica (Vol.VII). Diatom flora of marine coast I", pg.329, Pl.102:5,6;
Navicula plagiostoma (Grunow in Cleve & Moller), Navicula transfuga var. plagiostoma (Cleve)
Ecological Preference:
Valves linear-elliptic with parallel, slightly concave or convex margins and rostrate slightly droun out apices, 44.58µm long, 21.27µm broad. Raphe straight, external central endings expanded, axial area narrow, central area large, strongly asymmetric, expanded towards valve margins. Transapical striae punctate, parallel in the middle and close to the ends, radite between, 12 in 10µm.
  • Florida Bay Paleo Project

  • Sample localities:
  • Florida Bay