Gammaridae is a

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

amphipods Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far describ ...

. In North America they are included among the folk taxonomic category of " scuds", and otherwise gammarids is usually used as a common name. They have a wide distribution, centered on

Eurasia Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelago ...

, and are euryhaline as a lineage, inhabiting fresh to marine waters.

Systematics

The Gammaridae were for a long time used as a " wastebin taxon", which included numerous genera of

gammaridea 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 approx ...

n amphipods that since then have been removed to their own families, such as the

Anisogammaridae Anisogammaridae is a family of small benthic amphipods Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. ...

, Melitidae,

Niphargidae Niphargidae is a family of amphipod crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapoda, decapods, ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, krill, ...

. The following genera are currently listed in the family: *'' Akerogammarus'' Derzhavin & Pjatakova, 1967 *'' Albanogammarus'' Ruffo, 1995 *'' Amathillina'' G. O. Sars, 1894 *'' Axelboeckia'' Stebbing, 1899 *'' Baku'' Karaman & Barnard, 1979 *'' Cephalogammarus'' Karaman & Barnard, 1979 *'' Chaetogammarus'' Martynov, 1924 *'' Comatogammarus'' Stock, 1981 *'' Condiciogammarus'' G. Karaman, 1984 *'' Dershavinella'' Birstein, 1938 *''

Dikerogammarus ''Dikerogammarus'' is a genus of amphipod crustaceans, containing the following species: *'' Dikerogammarus aralychensis'' (Birstein, 1932) *'' Dikerogammarus batalonicus'' Ponyi, 1955 *'' Dikerogammarus bispinosus'' Martynov, 1925 *'' Dikeroga ...

'' Stebbing, 1899 *'' Echinogammarus'' Stebbing, 1899 *''

Gammarus ''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 i ...

'' Fabricius, 1775 *''

Gmelina ''Gmelina'' is a genus of plants in the family Lamiaceae. It consists of about 35 species in Australia, New Guinea, New Caledonia, Southeast Asia, India and a few in Africa. Some species such as ''G. arborea'' have been planted and/or become nat ...

'' G. O. Sars, 1894 *'' Gmelinopsis'' G. O. Sars, 1896 *'' Homoeogammarus'' Schellenberg, 1937 *'' Ilvanella'' Vigna-Taglianti, 1971 *'' Jubeogammarus'' G. Karaman, 1984 *'' Jugogammarus'' S. Karaman, 1953 *'' Kuzmelina'' Karaman & Barnard, 1979 *'' Lanceogammarus'' Karaman & Barnard, 1979 *'' Laurogammarus'' G. Karaman, 1984 *'' Longigammarus'' G.S. Karaman, 1970 *'' Lunulogammarus'' Krapp-Schickel, Ruffo & Schiecke, 1994 *'' Lusigammarus'' Barnard & Barnard, 1983 *'' Marinogammarus'' Sexton & Spooner, 1940 *'' Neogammarus'' Ruffo, 1937 *'' Parhomoeogammarus'' Schellenberg, 1943 *'' Pectenogammarus'' Reid, 1940 *'' Relictogammarus'' Hou & Sket, 2016 *'' Rhipidogammarus'' Stock, 1971 *'' Sarothrogammarus'' Martynov, 1935 *'' Scytaelina'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *'' Shablogammarus'' Carausu, Dobreanu & Manolache, 1955 *'' Sinogammarus'' Karaman & Ruffo, 1994 *'' Sowinskya'' Derzhavin, 1948 *'' Tadzhikistania'' Barnard & Barnard, 1983 *'' Tadzocrangonyx'' Karaman & Barnard, 1979 *'' Trichogammarus'' Hou & Sket, 2016 *'' Tyrrhenogammarus'' Karaman & Ruffo, 1989 *'' Yogmelina'' Karaman & Barnard, 1979

References

External links

Scuds in the Aquarium

Scuds In Aquarium (What are they and should I remove them)
Crustacean families {{amphipod-stub