Cymbopleura Rupicola Guide
Credit: Loren Bahls
  1. Valves lanceolate to rhombic-lanceolate
  2. Apices weakly protracted and narrowly rounded
  3. Striae coarsely punctate

Cymbopleura rupicola has lanceolate to rhombic-lanceolate valves with weakly protracted and narrowly rounded apices and coarsely punctate striae.