''Gammarus'' is an

amphipod 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 descr ...

crustacean genus in the family

Gammaridae 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. They have a wide distribution, centered on Eurasia, and are eur ...

. 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 Salinity () is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal ...

, and different tolerances; '' Gammarus pulex'', for instance, is a purely

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...

species, while '' Gammarus locusta'' is estuarine, only living where the salinity is greater than 25 ‰. Species of ''Gammarus'' are the typical " scuds" of North America and range widely throughout the Holarctic. A considerable number are also found southwards into the

Northern Hemisphere The Northern Hemisphere is the half of Earth that is north of the Equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's Nort ...

tropics, particularly in Southeast Asia.

Species

The following species are included: Four new species were found in 2018 on the Tibetan Plateau. Four more new species were described from the Chihuahuan Desert in 2021. *'' Gammarus abscisus'' G. Karaman, 1973 *'' Gammarus abstrusus'' Hou, Platvoet & Li, 2006 *''

Gammarus acalceolatus ''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 ...

'' Pinkster, 1970 *''

Gammarus accolae ''Gammarus'' is an Amphipoda, amphipod crustacean genus in the family (biology), family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimu ...

'' G. Karaman, 1973 *'' Gammarus accretus'' Hou & Li, 2002 *''

Gammarus acherondytes ''Gammarus acherondytes'', the Illinois cave amphipod, is a species of crustacean in the family Gammaridae. The crustacean is endemic to the Illinois Sinkhole Plain of Monroe County and St. Clair County, in southwestern Illinois, including Illi ...

'' Hubricht & Mackins, 1940 *''

Gammarus aequicauda ''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, particularl ...

'' (Martynov, 1931) *'' Gammarus agrarius'' G. Karaman, 1973 *'' Gammarus albimanus'' G. Karaman, 1968 *'' Gammarus alsaticus'' Van Straelen, 1924† *'' Gammarus altus'' Hou & Li, 2018 *'' Gammarus anatoliensis'' Schellenberg, 1937 *''

Gammarus angulatus ''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 ...

'' (Martynov, 1930) *''

Gammarus angusticoxalis ''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, particularl ...

'' Martynov, 1935 *''

Gammarus annandalei ''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 ...

'' (Monod, 1924) *''

Gammarus annulatus ''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, particularl ...

'' Smith, 1873 *''

Gammarus anodon ''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, particularl ...

'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *''

Gammarus aoculus ''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 ...

'' Hou & Li, 2003 *''

Gammarus araxenius ''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 ...

'' Derzhavin, 1938 *'' Gammarus arduus'' G. Karaman, 1975 *'' Gammarus argaeus'' Vávra, 1905 *''

Gammarus bakhteyaricus ''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, particularl ...

'' Khalayi-Pirbalanty & Sari, 2004 *''

Gammarus balcanicus ''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 ...

'' Schaferna, 1922 *''

Gammarus barnaulensis ''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, particularl ...

'' Schellenberg, 1937 *'' Gammarus baysali'' Özbek et al., 2013 *''

Gammarus belli ''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 ...

'' G. Karaman, 1984 *''

Gammarus bergi ''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, particularl ...

'' Martynov, 1930 *''

Gammarus birsteini ''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 ...

'' Karaman & Pinkster, 1977 *''

Gammarus bosniacus ''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, particularl ...

'' Schäferna, 1922 *''

Gammarus bousfieldi ''Gammarus bousfieldi'' is a species of crustacean in family Gammaridae 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 co ...

'' Cole & Minckley, 1961 *''

Gammarus brevicornis ''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 ...

'' (Martynov, 1935) *''

Gammarus brevipodus ''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, particularl ...

'' Hou, Li & Platvoet, 2004 *''

Gammarus breviramus ''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, particularl ...

'' Bousfield & Elwood, 1971 *''

Gammarus bucharensis ''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, particularl ...

'' Martynov, 1935 *''

Gammarus caparti ''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 ...

'' Petre-Stroobants, 1981 *''

Gammarus caucasicus ''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, particularl ...

'' Martynov, 1932 *''

Gammarus caudisetus ''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 ...

'' Viviani, 1805 *''

Gammarus chaohuensis ''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 ...

'' Hou & Li, 2002 *''

Gammarus chevreuxi ''Gammarus chevreuxi'' is a species of crustacean in the family Gammaridae. It was first described by Elsie Wilkins Sexton in 1913. The organism is very similar to ''Gammarus locusta'', but there are certain constant characteristic which set it a ...

'' Sexton, 1913 *''

Gammarus chimkenti ''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 ...

'' G. Karaman, 1984 *''

Gammarus chostensis ''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, particularl ...

'' Martynov, 1932 *''

Gammarus cohabitus ''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 ...

'' Hosinger, Shafer, Fong & Culver, 2008 *''

Gammarus colei ''Gammarus'' is an Amphipoda, amphipod crustacean genus in the family (biology), family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimu ...

'' sp. nov. *'' Gammarus comosus'' Hou, Li & Gao, 2005 *'' Gammarus craspedotrichus'' Hou & Li, 2002 *''

Gammarus crenulatus ''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 ...

'' G. S. Karaman & Pinkster, 1977 *''

Gammarus crinicaudatus ''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, particularl ...

'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *''

Gammarus crinicornis ''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, particularl ...

'' Stock, 1966 *''

Gammarus crispus ''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 ...

'' Martynov, 1932 *''

Gammarus curvativus ''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, particularl ...

'' Hou & Li, 2003 *''

Gammarus dabanus ''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 ...

'' Tachteew & Mekhanikova, 2000 *''

Gammarus daiberi ''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 ...

'' Bousfield, 1969 *''

Gammarus decorosus ''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 ...

'' Meng, Hou & Li, 2003 *''

Gammarus denticulatus ''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 ...

'' Hou, Li & Morino, 2002 *'' Gammarus desperatus'' Cole, 1981 *'' Gammarus dorsosetosus'' Mateus & Mateus, 1990 *'' Gammarus duebeni'' Liljeborg, 1852 *''

Gammarus dulensis ''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, particularl ...

'' S. Karaman, 1929 *'' Gammarus edwardsi'' Bate, 1862 *''

Gammarus effultus ''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 ...

'' G. Karaman, 1975 *''

Gammarus electrus ''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, particularl ...

'' Hou & Li, 2003 *''

Gammarus elevatus ''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 ...

'' Hou, Li & Morino, 2002 *''

Gammarus elvirae ''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 ...

'' Iannilli & Ruffo, 2002 *'' Gammarus emeiensis'' Hou, Li & Koenemann, 2002 *''

Gammarus fasciatus ''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 ...

'' Say, 1818 *''

Gammarus finmarchicus ''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, particular ...

'' Dahl, 1938 *'' Gammarus flabellifera'' Stimpson, 1856 *''

Gammarus fluviatilis ''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, particularl ...

'' Milne-Edwards, 1840† *''

Gammarus fontinalis ''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, particular ...

'' Costa, 1883 *''

Gammarus fossarum ''Gammarus fossarum'' is a species complex of freshwater amphipod crustacean native to Europe. They are abundant members of the macroinvertebrate community, and also used as model organisms for ecotoxicology. Description ''Gammarus fossaru ...

'' Koch, 1836 *''

Gammarus frater ''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 ...

'' Karaman & Pinkster, 1977 *'' Gammarus frigidus'' Hou & Li, 2004 *''

Gammarus galgosensis ''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 ...

'' Lee & Kim, 2004 *''

'' Lee & Kim, 1980 *''

Gammarus gauthieri ''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 ...

'' (S. Karaman, 1935) *''

Gammarus glabratus ''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, particularl ...

'' Hou & Li, 2003 *''

Gammarus goedmakersae ''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 ...

'' G. S. Karaman & Pinkster, 1977 *'' Gammarus gonggaensis'' Hou & Li, 2018 *''

Gammarus gracilis ''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 ...

'' Martynov, 1935 *''

Gammarus gregoryi ''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 ...

'' Tattersall, 1924 *''

Gammarus halilicae ''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, particularl ...

'' G. Karaman, 1969 *'' Gammarus hegmatanensis'' Hekmatara, Sari & Baladehi, 2011 *'' Gammarus hirsutus'' Martynov, 1935 *''

Gammarus hongyuanensis ''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, particularl ...

'' Barnard & Dai, 1988 *''

Gammarus hoonsooi ''Gammarus hoonsooi'' is a species in the genus '' Gammarus'' in the family Gammaridae, in the order Gammaridea - which belongs to the taxon amphipoda. The species has not been found in Scandinavia, or in the North Atlantic Ocean The Atl ...

'' Lee, 1986 *''

Gammarus hyalelloides ''Gammarus hyalelloides'' is a species of amphipod crustacean in the family Gammaridae. It is endemic to four springs in Jeff Davis County and Reeves County, Texas, and is listed as a vulnerable species on the IUCN Red List. Description and e ...

'' Cole, 1976 *''

Gammarus ibericus ''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 ...

'' Margalef, 1951 *'' Gammarus inaequicauda'' Stock, 1966 *''

Gammarus inberbus ''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, particularl ...

'' Karaman & Pinkster, 1977 *''

Gammarus inopinatus ''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 ...

'' Mateus & Mateus, 1990 *''

Gammarus insensibilis ''Gammarus insensibilis'', the lagoon sand shrimp, is a species of amphipod crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remi ...

'' Stock, 1966 *''

Gammarus italicus ''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 ...

'' Goedmakers & Pinkster, 1977 *'' Gammarus izmirensis'' Özbek, 2007 *''

Gammarus jacksoni ''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 ...

'' Morino & Whitman, 1995 *''

Gammarus jaspidus ''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, particularl ...

'' Hou & Li, 2004 *''

Gammarus jenneri ''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 ...

'' Bynum & Fox, 1977 *''

Gammarus kamtschaticus ''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, particularl ...

'' Tzvetkova, 1972 *''

Gammarus kangdingensis ''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, particularl ...

'' Hou & Li, 2018 *''

Gammarus kasymovi ''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 ...

'' Aliev, 1997 *'' Gammarus katagani'' Özbek, 2012 *''

Gammarus kesanensis ''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, particularl ...

'' Özbek & Camur-Elipek, 2010 *''

Gammarus kesslerianus ''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 ...

'' Martynov, 1931 *'' Gammarus kischineffensis'' Schellenberg, 1937 *''

Gammarus komareki ''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 ...

'' (Schaferna, 1922) *'' Gammarus korbuensis'' Martynov, 1930 *''

Gammarus koshovi ''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 ...

'' Bazikalova, 1946 *''

Gammarus kyonggiensis ''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, particularl ...

'' Lee & Seo, 1990 *''

Gammarus laborifer ''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, particularl ...

'' Karaman & Pinkster, 1977 *''

Gammarus lacustris ''Gammarus lacustris'' is an aquatic amphipod. Description ''Gammarus lacustris'' is semi-transparent and lacks a webbed tail. It may be colorless, brown, reddish or bluish in color, depending on the local environment. It has seven abdominal segm ...

'' G. O. Sars, 1864 *''

Gammarus langi ''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 ...

'' sp. nov. *'' Gammarus lasaensis'' Barnard & Dai, 1988 *''

Gammarus laticoxalis ''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, particular ...

'' Karaman & Pinkster, 1977 *''

Gammarus lawrencianus ''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 ...

'' Bousfield, 1956 *'' Gammarus lecroyae'' Thoma & Heard, 2009 *'' Gammarus ledoyeri'' G. Karaman, 1987 *'' Gammarus lepoliensis'' Jazdzewski & Konopacka, 1989 *'' Gammarus lichuanensis'' Hou & Li, 2002 *''

Gammarus limnaeus ''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 ...

'' S. I. smith, 1874 *''

Gammarus limosus ''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 ...

'' Hou & Li, 2018 *''

Gammarus lobifer ''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 ...

'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *'' Gammarus locusta'' ( Linnaeus,

1758 Events January–March * January 1 – Swedish biologist Carl Linnaeus (Carl von Linné) publishes in Stockholm the first volume (''Animalia'') of the 10th edition of Systema Naturae, 10th edition of ''Systema Naturae'', the sta ...

) *''

Gammarus longipedis ''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 ...

'' Karaman & Pinkster, 1987 *''

Gammarus longisaeta ''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, particularl ...

'' Lee & Seo, 1992 *''

Gammarus lophacanthus ''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, particularl ...

'' Hou & Li, 2002 *'' Gammarus lordeganensis'' Khalayi-Pirbalanty & Sari, 2004 *''

Gammarus lychnidensis ''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 ...

'' Schellenberg, 1943 *''

Gammarus macedonicus ''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 ...

'' G. Karaman, 1976 *''

Gammarus madidus ''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 ...

'' Hou & Li, 2005 *'' Gammarus malpaisensis'' sp. nov. *'' Gammarus marmouchensis'' Fadil, 2006 *'' Gammarus maroccanus'' Fadil & Dakki, 2001 *''

Gammarus martensi ''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 ...

'' Hou & Li, 2004 *''

Gammarus matienus ''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, particularl ...

'' Derzhavin, 1938 *'' Gammarus miae'' Mateus & Mateus, 1990 *'' Gammarus microps'' Pinkster & Goedmakers, 1975 *''

Gammarus minus ''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, particularl ...

'' Say, 1818 *''

Gammarus mladeni ''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 ...

'' Karaman & Pinkster, 1977 *''

Gammarus monospeliensis ''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, particularl ...

'' Pinkster, 1972 *'' Gammarus montanus'' Hou, Li & Platvoet, 2004 *''

Gammarus mucronatus ''Gammarus mucronatus'' is a species of scud in the family Gammaridae. It is found in the coasts of the North American Atlantic seaboard and the Gulf of Mexico. Phylogenetics ''Gammarus mucronatus'' is part of the Arthropod phylum: it has an e ...

'' Say, 1818 *''

Gammarus murarius ''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 ...

'' Hou & Li, 2004 *'' Gammarus nekkensis'' Uchida, 1935 *''

Gammarus ninglangensis ''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, particularl ...

'' Hou & Li, 2003 *'' Gammarus nipponensis'' Uéno, 1940 *''

Gammarus nox ''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 ...

'' Stock, 1995 *''

Gammarus nudus ''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 ...

'' Martynov, 1931 *''

Gammarus obnixus ''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, particular ...

'' Karaman & Pinkster, 1977 *'' Gammarus obruki'' Özbek, 2012 *''

Gammarus oceanicus ''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, particularl ...

'' Segerstråle, 1947 *''

Gammarus ocellatus ''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 ...

'' Martynov, 1930 *''

Gammarus ochridensis ''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, particularl ...

'' (Schäferna, 1926) *''

Gammarus odaensis ''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, particularl ...

'' Lee & Kim, 1980 *''

Gammarus odettae ''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 ...

'' Mateus & Mateus, 1990 *''

Gammarus oeningensis ''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 ...

'' Heer, 1865† *''

Gammarus orinos ''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 ...

'' Pinkster & Schol, 1984 *''

Gammarus oronticus ''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, particularl ...

'' Alouf, 1979 *''

Gammarus osellai ''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, particularl ...

'' Karaman & Pinkster, 1977 *'' Gammarus pageti'' Mateus & Mateus, 1990 *'' Gammarus palustris'' Bousfield, 1969 *''

Gammarus parechiniformis ''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, particularl ...

'' G. Karaman, 1977 *'' Gammarus paricrenatus'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *''

Gammarus parthicus ''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 ...

'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *''

Gammarus paucispinus ''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 ...

'' Hou & Li, 2002 *''

Gammarus pavlovici ''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 ...

'' *''

Gammarus pavo ''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, particularl ...

'' Karaman & Pinkster, 1977 *''

Gammarus paynei ''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 ...

'' Delong, 1992 *''

Gammarus pecos ''Gammarus pecos'', commonly known as the Pecos amphipod, is a species of crustacean in family Gammaridae. It is endemic to Pecos County, Texas in the United States, where it is known from only two locations: Diamond Y Spring (sometimes known as ...

'' Cole & Bousfield, 1970 *''

Gammarus pellucidus ''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 ...

'' Gurjanova, 1930 *'' Gammarus percalacustris'' sp. nov. *'' Gammarus pexus'' Hou & Li, 2005 *''

Gammarus platvoeti ''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 ...

'' Hou & Li, 2003 *'' Gammarus pljakici'' G. Karaman, 1964 *''

Gammarus plumipes ''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, particularl ...

'' Mateus & Mateus, 1990 *''

Gammarus praecyrius ''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, particularl ...

'' Derzhavin, 1941† *'' Gammarus preciosus'' Wang, Hou & Li, 2009 *''

Gammarus pretzmanni ''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 ...

'' Mateus & Mateus, 1990 *''

Gammarus proiectus ''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, particularl ...

'' Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998 *''

Gammarus pseudoanatoliensis ''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, particularl ...

'' Karaman & Pinkster, 1987 *'' Gammarus pseudolimnaeus'' Bousfield, 1958 *'' Gammarus pseudosyriacus'' Karaman & Pinkster, 1977 *'' Gammarus pulex'' Linnaeus, 1758 *''

Gammarus qiani ''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 ...

'' Hou & Li, 2002 *''

Gammarus rambouseki ''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, particularl ...

'' S. Karaman, 1931 *''

Gammarus retzi ''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, particularl ...

'' Maikovsky, 1941† *''

Gammarus rifatlensis ''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, particularl ...

'' Fadil, 2006 *''

Gammarus riparius ''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, particularl ...

'' Hou & Li, 2002 *'' Gammarus roeselii'' Gervais, 1835 *''

Gammarus rouxi ''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, particularl ...

'' Pinkster & Goedmakers, 1975 *''

Gammarus salemaai ''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 ...

'' G. Karaman, 1985 *''

Gammarus salinus ''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 ...

'' Spooner, 1947 *''

Gammarus sepidannus ''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 ...

'' Zamanpoore, Poeckl, Grabowski & Schiemer, 2009 *'' Gammarus setosus'' Dementieva, 1931 *''

Gammarus shanxiensis ''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 ...

'' Barnard & Dai, 1988 *'' Gammarus shenmuensis'' Hou & Li, 2004 *''

Gammarus sichuanensis ''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 ...

'' Hou, Li & Zheng, 2002 *''

Gammarus sinuolatus ''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 ...

'' Hou & Li, 2004 *''

Gammarus sirvannus ''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 ...

'' Hekmatara, Sari & Baladehi, 2011 *'' Gammarus sketi'' G. Karaman, 1989 *''

Gammarus sobaegensis ''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, particularl ...

'' G. Karaman, 1984 *''

Gammarus solidus ''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 ...

'' G. Karaman, 1977 *''

Gammarus songirdaki ''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, particularl ...

'' G. Karaman, 1984 *''

Gammarus soyoensis ''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 ...

'' Lee & Kim, 1980 *''

Gammarus spelaeus ''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 ...

'' Martynov, 1931 *'' Gammarus spinipalmus'' (Chen, 1939) *''

Gammarus spooneri ''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, particularl ...

'' G. Karaman, 1991 *''

Gammarus stagnarius ''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 ...

'' Hou, Li & Morino, 2002 *''

Gammarus stalagmiticus ''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 ...

'' Hou & Li, 2005 *''

Gammarus stankokaramani ''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 ...

'' G. Karaman, 1976 *'' Gammarus stojicevici'' (S. Karaman, 1929) *''

Gammarus stupendus ''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 ...

'' Pinkster, 1983 *'' Gammarus subtypicus'' Stock, 1966 *'' Gammarus suifunensis'' Martynov, 1925 *''

Gammarus syriacus ''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 ...

'' Chevreux, 1895 *''

Gammarus takesensis ''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 ...

'' Hou, Li & Platvoet, 2004 *''

Gammarus taliensis ''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, particularl ...

'' Shen, 1954 *''

Gammarus tauricus ''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 ...

'' Martynov, 1931 *'' Gammarus teletzkensis'' Martynov, 1930 *''

Gammarus tigrinus ''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 ...

'' Sexton, 1939 *'' Gammarus topkarai'' Özbek & Balik, 2009 *'' Gammarus translucidus'' Hou, Li & Li, 2004 *'' Gammarus troglophilus'' Hubricht & Mackins, 1940 *''

Gammarus truncatus ''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 ...

'' Martynov, 1930 *''

Gammarus turanus ''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, particularl ...

'' Martynov, 1935 *''

Gammarus uludagi ''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 ...

'' G. S. Karaman, 1975 *''

Gammarus unguiserratus ''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, particularl ...

'' Costa, 1853 *''

Gammarus ustaoglui ''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, particularl ...

'' Özbek & Guloglu, 2005 *''

Gammarus varsoviensis ''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, particularl ...

'' Jazdzewski, 1975 *''

Gammarus vignai ''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 ...

'' Pinkster & Karaman, 1978 *''

Gammarus wangbangensis ''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, particularl ...

'' Lee & Seo, 1990 *''

Gammarus wautieri ''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 ...

'' Roux, 1967 *'' Gammarus wilkitzkii'' Birula, 1897 *''

Gammarus xiangfengensis ''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, particularl ...

'' Hou & Li, 2002 *''

Gammarus zaddachi ''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 ...

'' Sexton, 1912 *'' Gammarus zagrosensis'' Zamanpoore, Poeckl, Grabowski & Schiemer, 2009 *''

Gammarus zeongogensis ''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, particularl ...

'' Lee & Kim, 1980

References

{{Taxonbar, from=Q548451 Gammaridea Taxonomy articles created by Polbot Crustacean genera