Terpsinoe Musica Guide
Credit: Shelly Wu
  1. Valves generally triundulate
  2. Pseudocelli present
  3. Rimoportulae present
  4. Silica bars present

Valves are triundulate, except in specimens at the lower end of the size spectrum. Pseudocelli are present at valve apicies.The inflations are almost equal in width. The middle inflation contains a rimoportula, positioned slightly off center. The areolae are coarse and randomly arranged. In girdle view, the silica bars resemble music notes.