Stygiomysida

Spelaeomysis is a genus of crustaceans belonging to the monotypic family Lepidomysidae, which is variously considered a part of the order Stygiomysida or Mysida.

Stygiomysis is the single genus of crustaceans in the family Stygiomysidae, which is variously considered part of the orders Stygiomysida or Mysida.

Stygiomysida is a small order of malacostracan crustaceans in the superorder Peracarida. It has traditionally been considered part of the order Mysida (opossum shrimps), but was separated from it on phylogenetic grounds.