Gammaridea is one of the suborders of the order Amphipoda, comprising small, shrimp-like crustaceans. Until recently, in a traditional classification, it encompassed about 7,275 (92%) of the 7,900 species of amphipods described by then, in approximately 1,000 genera, divided among around 125 families. That concept of Gammaridea included almost all freshwater amphipods, while most of the members still were marine.
Dexaminidae is a family of amphipods. It contains the following genera:
Calliopiidae is a family of amphipods, containing the following genera:
Caprellidae is a family of amphipods commonly known as skeleton shrimps. Their common name denotes the threadlike slender body which allows them to virtually disappear among the fine filaments of seaweed, hydroids and bryozoans. They are sometimes also known as ghost shrimps.
Oedicerotidae is a family of amphipods. It comprises the following genera:
Lysianassidae is a family of marine amphipods, containing the following genera:
Leucothoe is a genus of amphipods in the family Leucothoidae. It contains the following species:
Talorchestia is a genus of amphipod of the family Talitridae, containing the following species:
Gammarus is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimal conditions, particularly in terms of salinity, and different tolerances; Gammarus pulex, for instance, is a purely freshwater species, while Gammarus locusta is estuarine, only living where the salinity is greater than 25‰.
Paramelita is a genus of crustacean in family Paramelitidae, containing the following species:
Paramelitidae is a family of amphipods, containing the following genera:
Photis is a genus of amphipod crustaceans, containing the following species:
Urothoe is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide.
Pontogeneiidae is a family of amphipod crustaceans, containing the following genera:
Nototropis is a genus of amphipod crustaceans, in the family, Atylidae, and was first described by Achille Costa in 1853.
Stegocephalidae is a little-studied family of amphipods belonging to the suborder Gammaridea.
Phoxocephalidae is a family of small, shrimp-like crustaceans in the suborder Gammaridea described by Georg Ossian Sars in 1891. It contains Cocoharpinia iliffei, a critically endangered species on the IUCN Red List.
Stenothoidae is a family of arthropods in the order Amphipoda.
Iphimediidae is a family of amphipods belonging to the order Amphipoda.
