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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)

Seminavis strigosa

Seminavis strigosa

(Hustedt) Danielidis & Economou-Amilli
Danielidis, D.B. & D.G. Mann (2002). New species and new combinations in the genus Seminavis (Bacillariophyta). In press.
Amphora strigosa (Hustedt, )
Ecological Preference:
Valves semi-lanceolate with acutely rounded apices, 29.7-49.7µm long, 4-6.5µm broad. Dorsal margin smoothly arched. Ventral margin more or less straight. Raphe filiform located close to the ventral margin. Raphe branches delicately arched dorsally. Proximal ends of the raphe bent ventrally, distal ends hooked dorsally. Axial area on the dorsal side narrow near the poles, but spread out at the central part of the valve, on the ventral side slender. Central area on the dorsal side big, on the ventral side it is bordered by the ventral striae. Transapical striae on the dorsal side parallel at the central part of the valve, becoming slightly radiate towards apices, 18-20 in 10µm. Ventral striae short, uninterrupted at the centre, parallel, 16-20 in 10µm.
  • Southeast Florida Coastal Mangroves
  • Florida Bay Paleo Project

  • Sample localities:
  • Florida Bay