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Guide to Frustulia asiatica

(Skvortzow) Metzeltin, Lange-Bert. and Nergui 2009

Frustulia Asiatica Guide
Credit: Carrie Graeff
  1. Longitudinal ribs incomplete at the valve center
  2. Valves linear-lanceolate
  3. Central area oval

Unlike most species of Frustulia, F. asiatica has longitudinal ribs that are incomplete at the valve center. The valves are linear-lanceolate and not at all rhomboid like other Frustulia taxa, but linear-lanceolate in shape. The central area is oval.