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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 latior

Seminavis latior

(A. Schmidt) Danielidis & Mann
Danielidis, D.B. & D.G. Mann (2002). New species and new combinations in the genus Seminavis (Bacillariophyta). In press.
Amphora cymbelloides var. latior (Schmidt, 1874-1959)
Ecological Preference:
Valve semi-lanceolate with acutely rounded poles, 40.3-104.6µm long, 8.7-18.6µm broad. Dorsal margin arched, ventral margin straight to very slightly concave. Raphe filiform with dorsally hooked distal ends and simple proximal ends. Central pores well visible under LM. Axial area expanded dorsally, narrow on the ventral side. Central area on the dorsal side big, formed as a result of shortening of the dorsal striae; on the ventral side smaller and bordered by ventral striae. Dorsal striae slightly radiate at the centre, becoming strongly radiate toward the ends, 15-20 in 10µm. Ventral striae uninterrupted and strongly radiate at the central part, becoming slightly radiate and parallel near the poles, 9-16 in 10µm.
  • Southeast Florida Coastal Mangroves
  • Florida Bay Paleo Project

  • Sample localities:
  • Florida Bay