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Guide to Brachysira neoacuta

Lange-Bert. in Lange-Bert. and Gerd Moser 1994

Brachysira Neoacuta
Credit: Paul Hamilton
  1. Valves narrowly lanceolate
  2. Striae strongly radiate at the center
  3. Areolae distinctly rectangular
  4. Distal raphe unilaterally curved

Valves are narrowly lanceolate, with a length to width ratio of approximately 5:1. The striae are strongly radiate at the center, becoming parallel at the apices. Irregular striae are present near the central area. Areolae are distinctly rectangular and range 2-4 per stria. The distal raphe is distinctly unilaterally curved.