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.
Corophiidae is a family of amphipods, containing the following genera:
Calliopiidae is a family of amphipods, containing the following genera:
Liljeborgiidae is a family of amphipods, containing the following genera:
Pardaliscidae is a family of amphipods, whose members typically inhabit the deepest parts of ocean basins. It contains the following genera:
Oedicerotidae is a family of amphipods. It comprises the following genera:
Lysianassidae is a family of marine amphipods, containing the following genera:
Gammaridae is a family of amphipods. In North America they are included among the folk taxonomic category of "scuds", and otherwise gammarids is usually used as a common name.
Bogidiella is a genus of crustacean in the family Bogidiellidae, 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‰.
Idunella is a genus of crustacean in family Liljeborgiidae. It contains the following species:
Niphargus is by far the largest genus of its family, the Niphargidae, and the largest of all freshwater amphipod genera.
Proasellus is a genus of isopod crustaceans in the family Asellidae. Two of its species, P. parvulus and P. slovenicus, are Slovenian endemics which are listed as vulnerable species on the IUCN Red List.
Niphargidae is a family of amphipod crustaceans. Its distribution is in western Eurasia, and its members mainly live in subterranean freshwaters habitats. It contains the following genera:
Chelicorophium is a genus of amphipod crustaceans, comprising the following species:
Atylidae is a family of amphipod crustaceans, containing the following genera:
Bogidiellidae is a family of amphipod crustaceans, containing the following genera:
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.
Haustorius is a genus of amphipods in the family Haustoriidae. There are about six described species in Haustorius.
Pleustidae is a family of amphipods belonging to the order Amphipoda.
