Diatoms of North AmericaDiatoms of North America
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Guide to Eucocconeis depressa

(Cleve) Lange-Bert. in Lange-Bert. and Genkal 1999

Eucocconeis Depressa Guide
  1. Ends rostrate to subcapitate
  2. Raphe valve with transapically expanded central area
  3. Striae evenly spaced

Valves are broadly elliptic-lanceolate, with rostrate to subcapitate ends. Valves are strongly arched, a feature most evident in girdle view. On the raphe valve, the central area is transapically expanded. On the rapheless valve, the central area is larger and more irregular in shape. On both valves, the striae are radiate, evenly spaced and number 28-32 in 10 µm.