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Diatom Image Database

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 acrosphaeria

Pinnularia acrosphaeria


Authority:
W. Smith
Year:
1853
References:
Patrick, R. & Reimer, C. W (1966). The Diatoms of the United States I. Monographs of the Academy of Natural Sciences of Philadelphia. Pennsylvania. pp. 623-624; 660-661 [pl.60:2-3]
Synonyms:
Pinnularia acrosphaeria W. Sm. 1853; Pinnularia acrosphaeria var. sandvicensis A. S. 1876; Navicula acrosphaeria var. minor M. Perag. & Hérib. in Hérib. 1893; Pinnularia acrosphaeria f. minor Cl. 1895
Description:
Valve is linear, swollen in the middle portion, with rounded, usually somewhat swollen ends (often almost as wide as the valve's median portion); axial area is broad, about 1/3 the valve breadth and covered with small granules; raphe is filiform, with distinct semicircular terminal fissures; central area is not differentiated from the axial area; striae is parallel or slightly radiate; length is 30-180µm, breadth is 8-20µm; striae count is 6-14 in 10µm
Projects:
  • Transect Project


    • Sample localities:
  • Water Conservation Area 2A (WCA 2A)