Amphipoda
Guides
Barce husseyi
Barce cf-husseyi is an amphipod crustacean in the family Phliantidae. The 'cf.' designation indicates the specimen resembles Barce husseyi but definitive identification requires further verification. Amphipods in this genus are typically marine, benthic organisms associated with hard substrates or sediments.
Gammarus seideli
Seidel's Scud
Gammarus seideli is a species of freshwater amphipod in the family Gammaridae, described in 2018. It is one of numerous Gammarus species found in North American freshwater systems. The species is recognized by iNaturalist with the common name "Seidel's Scud" and has been documented in a small number of observations. As a relatively recently described species, detailed ecological and biological information remains limited.
Hadziidae
Hadziidae is a family of amphipod crustaceans established by S. Karaman in 1943. Members are taxonomically difficult to distinguish from the closely related family Melitidae. The family includes both marine and freshwater-dwelling species, with some lineages having colonized subterranean habitats.
Peracarida
Amphipods, Isopods, and Allies
Peracarida is a superorder of malacostracan crustaceans comprising approximately 12,000 species across 13 orders. The group is defined by the presence of a marsupium (brood pouch) formed by oostegites—flattened plates on the basalmost leg segments of females. Members occupy marine, freshwater, and terrestrial habitats, ranging from minute interstitial forms to the giant isopod Bathynomus giganteus (76 cm) and giant amphipod Alicella gigantea (34 cm). The earliest known peracaridian, Oxyuropoda ligioides, dates to the Late Devonian (~360 mya).