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Guide to Surirella tenera

W.Greg. 1856

Surirella Tenera Guide
Credit: Tahmineh Rouzbahani
  1. Valves large, heteropolar
  2. Porcae regularly spaced
  3. Central hyaline line narrow
  4. Fenestrae large

Valves are large and heteropolar, with a rounded headpole and cuneate footpole. Porcae, or transapical undulations, are regularly spaced, 18-26 in 100 µm. A narrow-lanceolate hyaline axial area is present. Fenestrae are large and conspicuous.