(Crustacea, Isopoda, Gnathiidae), a new species from the mesophotic reefs of Bermuda, with a key to from the Greater Caribbean biogeographic region.

is described from mesophotic coral ecosystems in Bermuda; it is distinguished by pronounced and pointed supraocular lobes, two superior frontolateral processes and a weak bifid mediofrontal process, pereonite 1 not fused dorsally with the cephalosome, and large eyes. This is the first record of a species of from Bermuda. A synopsis and key to the other species from the Greater Caribbean biogeographic region is provided.