Limbodessus bennetti is a carnivorous subterranean water beetle.

It is the first stygobitic Dytiscidae to be recorded in the Pilbara region of Western Australia.

Of all species currently described, Limbodessus bennetti is most closely related to stygobitic members of the genus Limbodessus from the Yilgarn region of Western Australia.

It has been recorded from a single alluvial aquifer in the northern Pilbara.

This species is named in honour of Sean R. Bennett.