Notoplax latalamina is a species of chiton in the family Acanthochitonidae.
This species is endemic
to Stephen Island
in the Cook Strait
area of New Zealand
This chiton lives at depths of about 200 m
is extremely wide and spongy, greatly reducing the external surface of the valves
Coloration of the valves is pale fawn, and the girdle is brownish-grey.