Plaxiphora australis is a very small species of chiton in the family Mopaliidae.
This species is endemic
to New Zealand
's Snares Islands
The shell is very small, more or less eroded in all examples, but evidently without strong sculpture
. The head valve
has very fine incised radials, and the tail valve is without mucro or sculpture.
Coloration of the girdle is reddish-brown, with a well developed spiculose fringe, and longer hair-like bristles at the sutures.