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:
Hyalidae is a family of amphipods, containing 12 genera in two unequal subfamilies:
Dogielinotidae is a family of amphipods. It is subdivided into three subfamilies, containing a total of twelve genera:
Gammarellidae is a family of amphipods containing three genera:
Haustoriidae is a family of amphipods. They are very distinctive stout-bodied burrowing animals.
Podoceridae is a family of amphipods. It contains eight genera:
Pardaliscidae is a family of amphipods, whose members typically inhabit the deepest parts of ocean basins. It contains the following genera:
Talitridae is a family of amphipods. Terrestrial species are often referred to as landhoppers and beach dwellers are called sandhoppers or sand fleas. The name sand flea is misleading, though, because these talitrid amphipods do not bite people.
Oedicerotidae is a family of amphipods. It comprises the following genera:
Lysianassidae is a family of marine amphipods, containing the following genera:
Talorchestia is a genus of amphipod of the family Talitridae, containing the following species:
The Hyperiidae are a family of amphipods, containing these genera:
Urothoe is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide.
Atylidae is a family of amphipod crustaceans, containing the following genera:
Platorchestia is a genus of sand flea, containing the following species:
Parorchestia is a genus of amphipods in the family Talitridae, containing the following species:
Megalorchestia is a genus of sand-hoppers in the family Talitridae. The genus was erected by the German naturalist Johann Friedrich von Brandt in 1851 and the type species is Megalorchestia californiana.
Gammaroidea is a superfamily of amphipods in the order Amphipoda.
