Tags: Crustacean.
Cephalocarida is a class inside the subphylum Crustacea that comprises only twelve benthic species. They were discovered in 1955 by Howard L. Sanders and are commonly referred to as horseshoe shrimps. They have been grouped together with the Remipedia in the Xenocarida. Although a second family Lightiellidae is sometimes used all cephalocaridans are generally considered to belong in just one family: Hutchinsoniellidae.