| Nominal Species (n = 36) | Present allocation (n = 34) | Ref. |
|---|---|---|
| Gammarus acherondytes Hubricht & Mackin, 1940 | Gammarus acherondytes | 19 |
| Gammarus annulatus Smith, 1873 | Gammarus annulatus | 19 |
| Cheirocratus assimilis Liljeborg, 1852 | Cheirocratus assimilis | 19 |
| Hornellia atlanticus Thomas & Barnard, 1986 | Metaceradocus atlanticus | 86671 |
| Metaceradocus atlanticus Thomas & Barnard, 1986 | Metaceradocus atlanticus | 86737 |
| Gammarus berilloni Catta, 1878 | Echinogammarus berilloni | 3477 |
| Gammarus bousfieldi Cole & Minckley, 1961 | Gammarus bousfieldi | 19 |
| Gammarus chevreuxi Sexton, 1913 | Gammarus chevreuxi | 19 |
| Gammarus crinicornis Stock, 1966 | Gammarus crinicornis | 19 |
| Gammarus daiberi Bousfield, 1969 | Gammarus daiberi | 19 |
| Gammarus desperatus Cole, 1981 | Gammarus desperatus | 19 |
| Gammarus duebeni Lilljeborg, 1851 | Gammarus duebeni | 19 |
| Gammarus fasciatus Say, 1818 | Gammarus fasciatus | 19 |
| Gammarus finmarchicus Dahl, 1838 | Echinogammarus finmarchicus | 19 |
| Gammarus hyalelloides Cole, 1976 | Gammarus hyalelloides | 19 |
| Gammarus inaequicauda Stock, 1966 | Gammarus inaequicauda | 3477 |
| Gammarus insensibilis Stock, 1966 | Gammarus insensibilis | 19 |
| Cheirocratus intermedius Sars, 1894 | Cheirocratus intermedius | 19 |
| Gammarus jenneri Bynum & Fox, 1977 | Gammarus jenneri | 19 |
| Gammarus lacustris Sars, 1863 | Gammarus lacustris | 19 |
| Gammarus lawrencianus Bousfield, 1956 | Gammarus lawrencianus | 19 |
| Gammarus locusta Linnaeus, 1758 | Gammarus locusta | 19 |
| Echinogammarus mazestiensis Marin & Palatov, 2021 | Echinogammarus mazestiensis | 3477 |
| Gammarus obtusatus Dahl, 1938 | Echinogammarus obtusatus | 3477 |
| Gammarus oceanicus Segerstråle, 1947 | Gammarus oceanicus | 19 |
| Gammarus palustris Bousfield, 1969 | Gammarus palustris | 19 |
| Gammarus pecos Cole & Bousfield, 1970 | Gammarus pecos | 19 |
| Gammarus salinus Spooner, 1942 | Gammarus salinus | 19 |
| Gammarus setosus Dementieva, 1931 | Gammarus setosus | 19 |
| Cheirocratus spinibasus Ledoyer, 1984 | Cheirocratus spinibasus | 3477 |
| Gammarus subtypicus Stock, 1966 | Gammarus subtypicus | 3477 |
| Gammarus tigrinus Sexton, 1939 | Gammarus tigrinus | 19 |
| Metaceradocoides vitjazi Birstein & Vinegradou, 1960 | Metaceradocoides vitjazi | 19 |
| Gammarus wilkitzkii Birula, 1897 | Gammarus wilkitzkii | 19 |
| Lagunogammarus wilkitzkii Birula, 1897 | Gammarus wilkitzkii | 118130 |
| Gammarus zaddachi Sexton, 1912 | Gammarus zaddachi | 19 |