StygiomysisStygiomysis is the single genus of crustaceans in the family Stygiomysidae, which is variously considered part of the orders Stygiomysida or Mysida.The species of this genus are found in Caribbean.Species:Stygiomysis aemete Stygiomysis clarkei Stygiomysis cokei Stygiomysis holthuisi Stygiomysis hydruntina Stygiomysis ibarrae ''Stygiomysis major''