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Guide to Frustulia amosseana

Lange-Bert. in Rumrich et al. 2000

Frustulia Amosseana Guide
Credit: Loren Bahls
  1. Valves linear
  2. Central area linear
  3. Longitudinal ribs discontinuous at valve center

Valves are linear with rostrate to subrostrate apices. The central area is linear and elongate. Longitudinal ribs are not continuous through the central area.

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