Cymbopleura Angustata Guide
Credit: Loren Bahls
  1. Valves lanceolate, subtly triundulate, very slightly dorsiventral
  2. Proximal raphe ends close, deflected ventrally
  3. Distal raphe fissures comma-shaped, deflected dorsally

Cymbopleura angustata has lanceolate valves that are subtly triundulate and very slightly dorsiventral. Proximal raphe ends are close and deflected ventrally. Distal raphe fissures are comma-shaped and deflected dorsally.