Monotypic amphipod genera

Alicella gigantea is a giant species of amphipod inhabiting the deep sea, which is sometimes referred to as the "supergiant amphipod"; these crustaceans may reach in length. The only species within the genus Alicella, the species is white in colour and is distinguished from closely related amphipods mainly by size, though subtle anatomical differences can be used for small specimens. They live at depths of around , and their large body size is often presented as an example of abyssal gigantism. Genetic studies into the species have found that it has an exceptionally large genome, which may be

genus of crustaceans

Neocyamus is a monotypic genus of amphipod belonging to the family Cyamidae. The only species is Neocyamus physeteris.

Chaetocorophium is a monotypic genus of amphipods in the family Corophiidae, containing only the species Chaetocorophium lucasi. Chaetocorophium is very closely related to Paracorophium, and some researchers propose synonymising the two genera.

Bougisia is a genus of plankton in the sub-order Hyperiidea–a type of so-called "hyperid" amphipoda. The genus Bougisia is the only subordinate taxon in the monotypic family Bougisidae. The genus Bougisia is also monotypic, being represented by the single species, Bougisia ornata. This species lives as plankton in tropical and sub-tropical salt water. Hyperiidea species normally have a physique that differs from other types of amphipod.

Rakiroa is a monotypic genus of amphipods belonging to the monotypic family Rakiroidae. The only species is Rakiroa rima. Both genus and species were first described in 1982 by James K. Lowry and Graham David Fenwick.

Aetiopedes is a monotypic genus of amphipods belonging to the monotypic family Aetiopedesidae. The only species is Aetiopedes gracilis.