Cymatioa cooki. A, B living animal from Naples Point, SBMNH 629938, length = 7.4 mm A lateral view with extended foot, note mantle papillae anteriorly and dorsally B ventral view with wide, long mantle gape C, D animals on native substratum E–H holotype, LACMIP 59.2., length = 9.7 mm E exterior of right valve F exterior of left valve G interior of left valve H interior of right valve.

  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.