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  Animalia
      Arthropoda
        Crustacea
            Malacostraca
              Eumalacostraca
                  Peracarida
                    Amphipoda
                      Gammaridea
                            Lysianassidae
                                     Acheronia
                                             Acheronia pegasus
                                     Acidostoma
                                             Acidostoma hancocki
                                             Acidostoma laticorne
                                                   [Acidostoma laticornis]
                                             Acidostoma molariferum
                                                   [Acidostoma molarifera]
                                             Acidostoma nodiferum
                                             Acidostoma obesum
                                                   [Acidostoma neglectum]
                                                   [Acidostoma obesus]
                                               Acidostoma obesum obesum
                                               Acidostoma obesum ortum
                                             Acidostoma ortum
                                             Acidostoma pectinata
                                             Acidostoma sarsi
                                     Acontiostoma
                                             Acontiostoma marionis
                                                   [Acontiostoma magellanicum]
                                             Acontiostoma tuberculata
                                     Adeliella
                                             Adeliella laticornis
                                             Adeliella olivieri
                                             Adeliella takoradia
                                     Alicella
                                             Alicella gigantea
                                     Allicella
                                             Allicella gigantea
                                     Allogaussia
                                             Allogaussia paradoxa
                                     Amaryllis
                                             Amaryllis atamasca
                                             Amaryllis atamasco
                                             Amaryllis bathycephalus
                                                   [Amaryllis brevicornis]
                                             Amaryllis belladonna
                                             Amaryllis macrophthalmus
                                                   [Amaryllis affinis]
                                             Amaryllis punicea
                                             Amaryllis reginae
                                             Amaryllis striata
                                             Amaryllis vittata
                                             Amaryllis zeylanica
                                             Amaryllis zeylanicum
                                     Ambasia
                                             Ambasia atlanticus
                                                   [Ambasia danielssenii]
                                                   [Ambasia marina]
                                                   [Gammarus atlanticus]
                                     Ambasiella
                                             Ambasiella murmanica
                                                   [Ambasia murmanica]
                                     Ambasiopsis
                                             Ambasiopsis brevipes
                                             Ambasiopsis georgiensis
                                             Ambasiopsis tumicornis
                                             Ambasiopsis uncinata
                                     Aristiopsis
                                             Aristiopsis georgiensis
                                             Aristiopsis robustus
                                             Aristiopsis tacitus
                                             Aristiopsis tumicornis
                                             Aristiopsis tumidus
                                             Aristiopsis uncinata
                                     Aruga
                                             Aruga falklandica
                                             Aruga holmesi
                                             Aruga oculata
                                     Arugella
                                             Arugella ewa
                                     Azotostoma
                                     Bathyamaryllis
                                             Bathyamaryllis perezi
                                     Bathyschraderia
                                             Bathyschraderia fragilis
                                             Bathyschraderia magnifica
                                     Boeckosimus
                                             Boeckosimus affinis
                                             Boeckosimus botkini
                                             Boeckosimus brevicaudatus
                                             Boeckosimus caricus
                                             Boeckosimus derjugini
                                             Boeckosimus dubius
                                             Boeckosimus edwardsi
                                             Boeckosimus krassini
                                             Boeckosimus normani
                                             Boeckosimus plautus
                                             Boeckosimus sibiricus
                                             Boeckosimus turgidus
                                     Bonassa
                                     Bruunosa
                                     Caeconyx
                                     Cedrosella
                                             Cedrosella fomes
                                                   [Ambasiopsis fomes]
                                     Cheirimedon
                                             Cheirimedon crenatipalmatus
                                     Concarnes
                                             Concarnes concavus
                                     Crybelocephalus
                                             Crybelocephalus megalurus
                                     Cyclocaris
                                             Cyclocaris tahitensis
                                     Dissiminassa
                                             Dissiminassa dissimilis
                                             Dissiminassa homosassa
                                     Eclecticus
                                             Eclecticus eclecticus
                                     Eurythenes
                                             Eurythenes gryllus
                                             Eurythenes obesus
                                     Gronella
                                             Gronella groenlandica
                                     Hippomedon
                                             Hippomedon abyssi
                                             Hippomedon coecus
                                             Hippomedon columbianus
                                             Hippomedon denticulatus
                                             Hippomedon gorbunovi
                                             Hippomedon granulosa
                                             Hippomedon granulosus
                                             Hippomedon holbolli
                                             Hippomedon kurilious
                                             Hippomedon minusculus
                                             Hippomedon pensacola
                                             Hippomedon propinquus
                                             Hippomedon serratus
                                             Hippomedon subrobustus
                                             Hippomedon tenax
                                             Hippomedon terex
                                             Hippomedon tricatrix
                                             Hippomedon zetesimus
                                     Ichnopus
                                             Ichnopus pelagicus
                                             Ichnopus spinicornis
                                             Ichnopus taurus
                                     Kakanui
                                             Kakanui integricauda
                                                   [Ambasia integricauda]
                                     Kerguelenia
                                             Kerguelenia compacta
                                     Koroga
                                             Koroga megalops
                                     Lepidepecreella
                                             Lepidepecreella bidens
                                             Lepidepecreella charno
                                             Lepidepecreella ctenophora
                                             Lepidepecreella cymba
                                             Lepidepecreella emarginata
                                             Lepidepecreella nubifer
                                             Lepidepecreella ovalis
                                             Lepidepecreella xenopus
                                     Lepidepecreoides
                                             Lepidepecreoides nubifer
                                     Lepidepecreum
                                             Lepidepecreum californiensis
                                             Lepidepecreum comatum
                                             Lepidepecreum eoum
                                             Lepidepecreum garthi
                                             Lepidepecreum gurjanovae
                                             Lepidepecreum kasatka
                                             Lepidepecreum longicorne
                                             Lepidepecreum serraculum
                                             Lepidepecreum serratum
                                             Lepidepecreum umbo
                                     Lysianassa
                                             Lysianassa alba
                                             Lysianassa ceratina
                                             Lysianassa holmesi
                                             Lysianassa insperata
                                             Lysianassa oculata
                                             Lysianassa pariter
                                             Lysianassa plumosa
                                     Lysianopsis
                                             Lysianopsis alba
                                             Lysianopsis cubensis
                                             Lysianopsis dissimilis
                                             Lysianopsis holmesi
                                             Lysianopsis macromerus
                                             Lysianopsis oculata
                                             Lysianopsis ozona
                                             Lysianopsis subantarctica
                                     Macronassa
                                             Macronassa macromera
                                             Macronassa pariter
                                     Menigrates
                                             Menigrates obtusifrons
                                             Menigrates spinirami
                                     Menigratopsis
                                             Menigratopsis svennilssoni
                                     Mesocyphocaris
                                             Mesocyphocaris longicaudatus
                                     Metacyclocaris
                                             Metacyclocaris polycheles
                                     Metacyphocaris
                                             Metacyphocaris helgae
                                     Ocosingo
                                             Ocosingo borlus
                                     Orchomene
                                             Orchomene abyssorum
                                             Orchomene anaguela
                                             Orchomene crenata
                                             Orchomene depressa
                                             Orchomene diamesus
                                             Orchomene dicipiens
                                             Orchomene groenlandica
                                             Orchomene humilis
                                             Orchomene intermedia
                                             Orchomene japonica
                                             Orchomene lepidula
                                             Orchomene limodes
                                             Orchomene macroserrata
                                             Orchomene magdalenensis
                                             Orchomene minuta
                                             Orchomene nana
                                             Orchomene nugax
                                             Orchomene obtusa
                                             Orchomene pacifica
                                             Orchomene pectinata
                                             Orchomene pinquis
                                             Orchomene plebs
                                             Orchomene rossi
                                             Orchomene serrata
                                             Orchomene similis
                                             Orchomene tschernyschevi
                                     Orchomenella
                                             Orchomenella decipiens
                                             Orchomenella groenlandica
                                             Orchomenella holmesi
                                                   [Orchomene holmesi]
                                             Orchomenella minuta
                                             Orchomenella norvegica
                                             Orchomenella pacifica
                                             Orchomenella perdido
                                             Orchomenella pinguis
                                             Orchomenella recondita
                                             Orchomenella thomasi
                                     Pachychelium
                                             Pachychelium davidis
                                     Pachynus
                                             Pachynus barnardi
                                     Paracyphocaris
                                             Paracyphocaris praedator
                                     Paralibrotus
                                             Paralibrotus setosus
                                     Paralicella
                                             Paralicella caperesca
                                             Paralicella fusiformis
                                             Paralicella microps
                                             Paralicella similis
                                             Paralicella tenuipes
                                             Paralicella vaporalis
                                     Paratryphosites
                                             Paratryphosites abyssi
                                     Paronesimus
                                             Paronesimus barentsi
                                     Prachynella
                                             Prachynella lodo
                                     Psammonyx
                                             Psammonyx longimerus
                                             Psammonyx nobilis
                                             Psammonyx terranovae
                                     Rimakoroga
                                             Rimakoroga floridana
                                             Rimakoroga floridiana
                                             Rimakoroga rima
                                     Scolopostoma
                                             Scolopostoma prionoplax
                                                   [Stomacontion prionoplax]
                                     Shoemakerella
                                             Shoemakerella cubensis
                                     Socarnes
                                             Socarnes bidenticulatus
                                             Socarnes erythrophthalmus
                                             Socarnes hartmanae
                                             Socarnes vahli
                                     Socarnoides
                                             Socarnoides eugenovi
                                             Socarnoides illudens
                                             Socarnoides kergueleni
                                                   [Acidostoma cultrifera]
                                     Stomacontion
                                             Stomacontion acutibasalis
                                             Stomacontion capense
                                             Stomacontion hurleyi
                                             Stomacontion insigne
                                             Stomacontion pepinii
                                                   [Acontiostoma pepinii]
                                                   [Stomacontion kergueleni]
                                             Stomacontion pungapunga
                                     Tectovalopsis
                                             Tectovalopsis diabolus
                                     Trischizostoma
                                             Trischizostoma nicaeense
                                             Trischizostoma raschii
                                     Tryphosella
                                             Tryphosella apalachicola
                                             Tryphosella compressa
                                             Tryphosella groenlandica
                                             Tryphosella horingi
                                             Tryphosella index
                                             Tryphosella metacaecula
                                             Tryphosella nanoides
                                             Tryphosella orchomenoides
                                             Tryphosella pusilla
                                             Tryphosella rotundata
                                             Tryphosella rusanovi
                                             Tryphosella sarsi
                                             Tryphosella schneideri
                                             Tryphosella spitzbergensis
                                             Tryphosella triangula
                                     Tryphosites
                                             Tryphosites alleni
                                             Tryphosites longipes
                                     Valettiopsis
                                             Valettiopsis dentata
                                             Valettiopsis dentatus
                                             Valettiopsis macrodactylus
                                             Valettiopsis multidentatus
                                     Ventiella
                                             Ventiella sulfuris
                                     Wecomedon
                                             Wecomedon similis
                                             Wecomedon wecomus
                                             Wecomedon wirketis