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:
Oedicerotidae is a family of amphipods. It comprises the following genera:
Lysianassidae is a family of marine amphipods, containing the following genera:
Eusiridae is a family of amphipods. It contains the following genera:
Leucothoe is a genus of amphipods in the family Leucothoidae. It contains the following species:
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:
Niphargus is by far the largest genus of its family, the Niphargidae, and the largest of all freshwater amphipod genera.
Photis is a genus of amphipod crustaceans, containing the following species:
Pontogeneiidae is a family of amphipod crustaceans, containing the following genera:
Stegocephalidae is a little-studied family of amphipods belonging to the suborder Gammaridea.
Stenothoidae is a family of arthropods in the order Amphipoda.
Astyra is a genus of amphipods in the family Stilipedidae. It contains 6 species.
Ampithoidae is a family of amphipod crustaceans. The family has a worldwide distribution as algal dwellers. They commonly create tube-shaped nests on their host plants or algae which serve as both shelter and food. Young ampithoids develop from eggs to a larval stage within their mother's brood-pouch, formed by the appendages of her abdomen.
Eusirus is a genus of amphipods belonging to the family Eusiridae. The genus has cosmopolitan distribution. Within the genus Eusirus sexual dimorphism is weak, therefore identifying the sex of non-adult individuals is difficult.
Scopelocheiridae is a family of crustaceans belonging to the order Amphipoda. The family was first described in 1997 by Helen E. Stoddart and James K. Lowry. The type genus is ScopelocheirusBate, 1857.
Maeridae is a family of marine amphipods, which was first described by Taudl Krapp-Schickel in 2008.
