Belongs within: Corophiida.Contains: Cyamus, Caprella. The Caprelloidea are a group of amphipods characterised by an extremely long basal segment on the urosome. Members include the Caprellidae, skeleton shrimp, which are small, elongate amphipods that are mostly found living among larger, camouflaging organisms such as bryozoans or seagrasses. Caprellinoididae resemble Caprellidae in body form but have… Continue reading Caprelloidea

Categorised as Amphipoda


Belongs within: Gammaridae. Gammarus is a primarily Holarctic genus of freshwater to estuarine amphipods with a strongly developed accessory flagellum, and natatory uropods with the inner ramus of uropod 3 well developed (Bousfield 1977). Gammarus Fabricius 1775S86 [incl. Bathyonyx Vejdovsky 1905B77, Rivulogammarus Karaman 1931B77] |–*G. pulex (Linnaeus 1758)B77 [=Cancer pulexB77, G. (Rivulogammarus) pulexB50a] | |–G.… Continue reading Gammarus

Categorised as Amphipoda


Belongs within: Amphipoda. The Physocephalata are a group of planktonic marine amphipods. The name means ‘swollen head’ and refers to the conspicuously enlarged head of many (but not all) members of the group. Members of the family Phronimidae are known for their habit of hollowing out the salps or siphonophores on which they feed to… Continue reading Physocephalata


Belongs within: Talitroidea. The Talitridae are a group of amphipods found on supralittoral beaches and in mangrove and terrestrial forests (Lowry & Myers 2013). Characters (from Lowry & Myers 2013): Body laterally compressed. Eyes well developed or absent, if present then round or ovoid. Antennae 1–2 calceoli absent. Antenna 1 shorter than peduncle of antenna… Continue reading Talitridae

Categorised as Amphipoda


Belongs within: Caprelloidea. Caprella is a diverse genus of skeleton shrimps characterised by the loss of pereopods 3 and 4, and absence of a mandibular palp in the mouthparts. <==Caprella [Caprellinae] |–C. acanthifera Leach 1814BD95 |–C. aequilibra Say 1818BD95 |–C. californicaL95 |–C. danilewskii (Czerniawski 1868)BD95 |–C. equilibra Say 1818L95 |–C. extensimana Laubitz 1995L95 |–C. fretensis… Continue reading Caprella

Categorised as Amphipoda


Belongs within: Amphilochidea.Contains: Urohaustoriidae, Eohaustorius, Urothoidae, Phoxocephalidae, Platyischnopidae. The Haustoroidea are a Holarctic group of marine amphipods with a short, broad, weakly rostrate head, ‘pseudorostrate’ paired peduncles on antenna 1, weakly or non-dactylate peraeopods and maxilliped, and a strongly deflexed urosome (Bousfield & Hoover 1995). Haustorioidea [Haustoriidira, Phoxocephaloidea, Pontoporeioidea]R99 |–Priscillina Stebbing 1888B69 [=Priscilla Boeck 1871… Continue reading Haustorioidea


Belongs within: Lysianassoidea.Contains: Lysianassa. The Lysianassidae are a group of marine amphipods characterised by a mitten-like terminal section on the section gnathopod (Barnard 1969). Characters (from Barnard 1969): Accessory flagellum usually present and more than 3-articulate but occasionally vestigial or few in segments; peduncle of antenna 1 short and stout, articles 2 and 3 usually… Continue reading Lysianassidae


Belongs within: Amphipoda.Contains: Neopleustinae, Parapleustinae, Metopa, Stenothoe. The Leucothoidea are a group of marine amphipods with the posterior pereopods uniform and telson lobes fused (Bousfield 1983). Snail mimics and marine symbionts Published 24 March 2009 The Pleustidae are a family of marine amphipods, distributed around the world. However, despite their seemingly cosmopolitan distribution and abundance,… Continue reading Leucothoidea


Belongs within: Crangonyctoidea. On Niphargus Published 12 October 2018 I’ve commented before on the unexpectedly high diversity of animal species that can be found living in groundwater. Because dispersal through this habitat is, unsurprisingly, often difficult and bodies of groundwater are often isolated from each other, many groundwater-adapted species can have almost ludicrously small ranges.… Continue reading Niphargus


Belongs within: Eumalacostraca. Burrowing beaky amphipods Published 3 October 2011 I’ve been out in the field for a couple of weeks, hence the momentary absence of regular posts. But I have returned, and shall kick off with a brief introduction to the Oedicerotidae. The oedicerotids are another cluster within the systematic morass that is the… Continue reading Oedicerotidae