A–C Cymatioa cooki, shell of left valve collected at Naples Point, SBMNH 641848, length 8.8 mm A exterior of valve B interior of valve C close up of hinge D–F Cymatioa electilis, left valve D, E holotype, CASIZG 043976, length = 16 mm D exterior of valve E interior of valve F paratype, SBMNH 34017, close up of hinge.

 
 
  Part of: Valentich-Scott P, Goddard JHR (2022) A fossil species found living off southern California, with notes on the genus Cymatioa (Mollusca, Bivalvia, Galeommatoidea). ZooKeys 1128: 53-62. https://doi.org/10.3897/zookeys.1128.95139