« Insertion plates are strong and coarse and can be grooved to denticulate. » – Tunnell & al.: Encyclopedia of Texas Seashells, TAMU Press, College Station 2010, p.103.
 

The shell is rather similar to that of Chiton Linnaeus, 1758; it differs in having less pectinate insertion plates and a less porous subtegmentum. The radula also shows some differences. Regarding the genus Chiton, here is a description of the shell: « Median valves having a single slit in each insertion-plate; [jugal] sinus generally denticulate… » – T. Iredale: “The chiton fauna of the Kermadec Islands”, Proceedings of the Malacological Society of London vol.XI, London 1914, p.37.