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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)

Pinnularia maior


Authority:
(Kutzing) Rabenhorst
Year:
1853
References:
Patric R. & Ch.W. Reimer (1966):"The diatoms of the United States", Vol.1, p.629, Pl.61:4;
Synonyms:
Frustulia maior (Kutzing 1833), Navicula major ((Kutzing)Kutzing 1844)
Ecological Preference:
Fresh
Description:
Valve is linear, with parallel sides; raphe is lateral and filiform; axial area is variable, but is usually about 1/3 the valve breadth; striae are radial in the middle, becoming convergent at the ends; length is 140-200(340)µm, breadth is 25-40(42)µm; striae count is 5-7 in 10µm; Patrick & Reimer (1966) describe this species as having a swollen middle with rounded, often slightly swollen ends; the axial area is 1/4-1/5 the valve breadth; the raphe has distinct terminal fissures; the central area is not much wider than the axial area, and is elliptical or somewhat irregular in shape; striae are crossed by a distinct band
Projects:
  • Southeast Florida Coastal Mangroves
  • Transect Project


  • Sample localities:
  • Water Conservation Area 3A (WCA 3A)