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Guide to Hannaea superiorensis

Bixby, Edlund and Stoermer 2005

Hannaea Superiorensis Guide
  1. Valves markedly arcuate
  2. Apices capitate
  3. Central, ventral inflation
  4. Striae alternate, parallel

Valves are markedly arcuate. Apices are capitate and deflexed to the ventral side. At the central valve, the ventral margin is expanded. Striae are alternate and parallel.