Ectemnorrhinus eatoni Palirhoeus is a monospecific genus of beetle found on islands in the Sub-Antarctic Indian Ocean.

This weevil species[2] was described in 1876 by the British entomologist C. O. Waterhouse who placed it in the genus Ectemnorrhinus.

[3] In 1971, Chilean-New Zealand entomologist Guillermo Kuschel created the monospecific genus Palirhoeus.

[3] Palirhoeus eatoni lives on the shoreline (in the littoral zone),[6] where it feeds on marine algae and lichens.

A genetic signature of isolation by distance in this species suggests that it disperses via rafting.