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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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You can also click on one of labeled areas on the map to browse by location.
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 obtusiuscula

Seminavis obtusiuscula

Seminavis obtusiuscula

(A. Schmidt) Danielidis & Mann
Danielidis, D.B. & D.G. Mann (2002). The systematics of Seminavis (Bacillariophyta): the lost identities of Amphora angusta, A. ventricosa and A. macilenta. In press.
Amphora obtusiuscula (Sullivan, 1990)
Ecological Preference:
Valve semi-elliptic, 14-55µm long, 4-8µm broad. Raphe straight, slightly displaced towards ventral margin, external central endings approximate, axial area linear, widened in the middel, Dorsal striae 34-40 in 10µm, hardly resolvabo under LM.
  • Florida Bay Paleo Project

  • Sample localities:
  • Florida Bay