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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)

Trachyneis aspera

Trachyneis aspera

Trachyneis aspera

Trachyneis aspera


Authority:
Ehrenberg
Year:
1843
References:
Witkowski et al. (2000):"Iconographia Diatomologica (Vol.VII). Diatom flora of marine coast I", pg. 355, Pl.159:1-6;
Synonyms:
Navicula aspera (Ehrenberg), Stauroneis pulchella (W. Smith)
Ecological Preference:
Marine
Description:
Valves lineolate-lanceolate to elliptic or elongated rhomboid, 42-140µm long, 22-35µm broad with obtusly rounded ends. Axial area very narrow or linear and unilateral, central area appears as a broad stauros that is not reaching to the margin, widened and truncate outwards. Areoly forming transverse striae, radiate throughout the valve, 11-15 in 10µm.
Length:
45 - 90 µm
Width:
24 - 35 µm
Strd:
6 - 9
Projects:
  • Florida Bay Paleo Project
  • Biscayne Bay Paleo Project


    • Sample localities:
  • Biscayne Bay (BISC)