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Organism
  Animalia
         [Metazoa]
      Annelida
        Clitellata
            Oligochaeta
                    Haplotaxida
                      Tubificina
                            Naididae
                                     Allonais
                                             Allonais chelata
                                             Allonais inaequalis
                                             Allonais inequalis
                                             Allonais paraguayensis
                                             Allonais pectinata
                                     Amphichaeta
                                             Amphichaeta americana
                                             Amphichaeta leydigi
                                             Amphichaeta raptisae
                                             Amphichaeta sannio
                                     Arcteonais
                                             Arcteonais inconstans
                                             Arcteonais lomondi
                                     Aulophorus
                                             Aulophorus furcatus
                                             Aulophorus vagus
                                     Bohemilla
                                     Branchiodrilus
                                             Branchiodrilus semperi
                                     Branchiura
                                             Branchiura sowerbyi
                                     Bratislavia
                                             Bratislavia bilongata
                                             Bratislavia unidentata
                                     Chaetobranchus
                                     Chaetogaster
                                             Chaetogaster diaphanus
                                             Chaetogaster diastrophus
                                             Chaetogaster krasnopolskiae
                                             Chaetogaster limnaei
                                             Chaetogaster longi
                                             Chaetogaster parvus
                                             Chaetogaster setosus
                                     Dero
                                             Dero abranchiata
                                             Dero bilongata
                                             Dero borellii
                                             Dero botrytis
                                             Dero caraibicus
                                             Dero digitata
                                             Dero discocephalus
                                             Dero dorsalis
                                             Dero flabelliger
                                             Dero floridana
                                             Dero furcata
                                             Dero hylae
                                                   [Schmardaella hylae]
                                             Dero limosa
                                             Dero lodeni
                                             Dero malayana
                                             Dero multibranchiata
                                             Dero nivea
                                             Dero obtusa
                                                   [Dero perrieri]
                                             Dero pectinata
                                             Dero raviensis
                                             Dero stephensoni
                                             Dero superterrenus
                                             Dero trifida
                                             Dero vaga
                                             Dero vagus
                                     Haemonais
                                             Haemonais waldvogeli
                                     Homochaeta
                                             Homochaeta naidina
                              Limnodriloidinae
                                     Doliodrilus
                                             Doliodrilus puertoricensis
                                     Parakaketio
                                     Rossidrilus
                                     Microchaeta
                                     Nadium
                              Naidinae
                                     Naidium
                                             Naidium breviseta
                                             Naidium luteum
                                     Nais
                                             Nais alpina
                                             Nais barbata
                                             Nais behningi
                                             Nais bretscheri
                                             Nais communis
                                             Nais elinguis
                                             Nais magnaseta
                                             Nais pardalis
                                             Nais pectinata
                                             Nais pseudobtusa
                                             Nais simplex
                                             Nais variabilis
                                     Neonais
                                             Neonais elegans
                                     Ophidonais
                                             Ophidonais serpentina
                                               Ophidonais serpentina meridionalis
                                               Ophidonais serpentina serpentina
                                               Ophidonais serpentina typica
                                     Paranais
                                             Paranais birsteini
                                             Paranais botniensis
                                             Paranais frici
                                             Paranais grandis
                                             Paranais litoralis
                                             Paranais macrochaeta
                                             Paranais simplex
                              Phallodrilinae
                                     Aberrantidrilus
                                     Abyssidrilus
                                             Abyssidrilus altoides
                                             Abyssidrilus opulentus
                                             Abyssidrilus potens
                                             Abyssidrilus profundus
                                     Aktedrilus
                                           [Bacescuella]
                                             Aktedrilus floridensis
                                             Aktedrilus knoellneri
                                             Aktedrilus labeosus
                                                   [Bacescuella labeosa]
                                             Aktedrilus locyi
                                             Aktedrilus longitubularis
                                             Aktedrilus oregonensis
                                             Aktedrilus parviprostatus
                                             Aktedrilus parvithecatus
                                                   [Bacescuella parvithecata]
                                             Aktedrilus parvulus
                                     Albanidrilus
                                     Atlantidrilus
                                             Atlantidrilus hamulus
                                             Atlantidrilus quadrisetis
                                     Bermudrilus
                                             Bermudrilus peniatus
                                     Coralliodrilus
                                             Coralliodrilus aequalis
                                             Coralliodrilus corpulentus
                                             Coralliodrilus leviatriatus
                                             Coralliodrilus longiductus
                                             Coralliodrilus priscus
                                             Coralliodrilus randyi
                                             Coralliodrilus rugosus
                                     Duridrilus
                                             Duridrilus tardus
                                     Gianius
                                     Inermidrilus
                                     Jamiesoniella
                                     Marionidrilus
                                     Mexidrilus
                                     Milliganius
                                     Mitinokuidrilus
                                     Nootkadrilus
                                             Nootkadrilus longisetosus
                                                   [Discordiprostatus longisetosus]
                                     Pacifidrilus
                                     Paraktedrilus
                                     Pectinodrilus
                                     Peosidriloides
                                     Phallodriloides
                                     Pirodriloides
                                     Pirodrilus
                                     Pseudospiridion
                                     Somalidrilus
                                     Piguetiella
                                             Piguetiella blanci
                                             Piguetiella michiganensis
                                     Piquetiella
                                             Piquetiella blanci
                                     Pristina
                                             Pristina acuminata
                                             Pristina aequiseta
                                             Pristina americana
                                             Pristina bilobata
                                             Pristina breviseta
                                             Pristina equiseta
                                             Pristina evelinae
                                             Pristina foreli
                                             Pristina idrensis
                                             Pristina leidyi
                                             Pristina longidentata
                                             Pristina longiseta
                                               Pristina longiseta bidentata
                                               Pristina longiseta leidyi
                                               Pristina longiseta longiseta
                                             Pristina longisoma
                                             Pristina menoni
                                             Pristina notopora
                                             Pristina osborni
                                             Pristina plumaseta
                                             Pristina proboscidea
                                             Pristina schmiederi
                                             Pristina sima
                                             Pristina synclites
                                     Pristinella
                                             Pristinella acuminata
                                             Pristinella jenkinae
                                             Pristinella longidentata
                                             Pristinella longisoma
                                             Pristinella minuta
                                             Pristinella osborni
                                             Pristinella sima
                              Rhyacodrilinae
                                     Ainudrilus
                                             Ainudrilus geminus
                                     Heronidrilus
                                           [Macquaridriloides]
                                     Paupidrilus
                                     Torodrilus
                                     Ripistes
                                             Ripistes parasita
                                     Schmardaella
                                     Slavina
                                             Slavina appendiculata
                                     Specaria
                                             Specaria fraseri
                                             Specaria helleri
                                             Specaria josinae
                                     Stephensoniana
                                             Stephensoniana tandyi
                                             Stephensoniana trivandrana
                                     Stylaria
                                             Stylaria fossularis
                                             Stylaria lacustris
                                     Thalassodrilides
                                           [Kaketio]
                                             Thalassodrilides gurwitschi
                              Tubificinae
                                     Baikalodrilus
                                             Baikalodrilus inflatus
                                     Baltidrilus
                                     Christerius
                                     Psammoryctes
                                     Tasserkidrilus
                                     Telliclio
                                     Uncinais
                                             Uncinais uncinata
                                     Uronais
                                     Vejdovskyella
                                             Vejdovskyella appendiculata
                                             Vejdovskyella comata
                                             Vejdovskyella hellei
                                             Vejdovskyella intermedia
                                     Wapsa
                                             Wapsa evelinae
                                             Wapsa grandis