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Guide to Eunotia macroglossa

Furey, Lowe, and Johansen 2009

Eunotia Macroglossa Guide
Credit: Paula Furey
  1. Helictoglossae prominent
  2. Dorsal margin convex, with apices slightly set off by a change in slope
  3. Ventral margin slightly concave to nearly straight
  4. Striae radiate at apices
  5. One apical rimoportula

Valves with the ventral margin slightly concave to nearly straight, the dorsal margin evenly convex up to the rounded ends, with apices slightly set off by a change in slope of the dorsal margin. Helictoglossae prominently visible in the LM as apical thickenings. Raphe extending from helictoglossa to 20-30% of the length of the valve. Striae slightly radiate, radiate at apices. One apical rimoportula positioned nearly parallel to striae.