What is "remipedia"

Remipedia is a class of blind crustaceans found in coastal aquifers which contain saline groundwater, with populations identified in almost every ocean basin so far explored, including in Australia, the Caribbean Sea, and the Atlantic Ocean. The first described remipede was the fossil Tesnusocaris goldichi ( Lower Pennsylvanian), but, since 1979, at least seventeen living species have been identified with global distribution throughout the neo-tropical zone.

Genetic studies have implied that remipedia are the crustaceans most closely related to insects, so much so that they and insects may be considered a "sister group" to all other crustacea.