Notoplax rubiginosa is a species of chiton in the family Acanthochitonidae, native to New Zealand.

The species grows to 18 millimetres (0.71 in) long and 10 millimetres (0.39 in) wide.

[1] N. rubiginosa is known as the most common chiton from the Plio-Pleistocene in fossil records of New Zealand.

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