The beach-hopper genus Platorchestia (Crustacea: Amphipoda: Talitridae) on Atlantic Ocean coasts and on those of associated seas

Five species of Platorchestia Bousfield, 1982, are described and figured from Atlantic Ocean shores (including the Caribbean, Baltic, and Mediterranean seas). Four of these are new to science. All five species had previously been illustrated in the literature but four of them had incorrectly been allocated to either Orchestia platensis Krøyer, 1945 or O. monodi Mateus, Mateus & Afonso, 1986.