Click the links to browse through the WoRMS marine species taxonomy.
Animalia
  Mollusca
  Porifera
  Platyhelminthes
  Nematoda
  Annelida
  Nemertina
  Arthropoda
    Crustacea
      Remipedia
      Branchiopoda
      Maxillopoda
      Malacostraca
      Ostracoda
        Myodocopa
        Podocopa
          Podocopida
            Bairdiocopina
            Cytherocopina
              Cytheroidea
                Bythocytheridae
                Cuneocytheridae
                Cushmanideidae
                Cytherettidae
                Cytheridae
                Cytherideidae
                Cytheroidea incertae sedis
                Cytheromatidae
                Cytheruridae
                Eucytheridae
                Hemicytheridae
                Krithidae
                Leptocytheridae
                Limnocytheridae
                Loxoconchidae
                Microcytheridae
                Neocytherideidae
                Paracytherideidae
                Paradoxostomatidae
                Trachyleberididae
                Xestoleberididae
                  Aspidoconcha
                  Microxestoleberis
                  Xestoleberis
                      Xestoleberis aurantia
                      Xestoleberis communis
                      Xestoleberis costata
                      Xestoleberis decipiens
                      Xestoleberis delamarei
                      Xestoleberis depressa
                      Xestoleberis fuscomaculata
                      Xestoleberis gigas
                      Xestoleberis humilis
                      Xestoleberis labiata
                      Xestoleberis margaritea
                      Xestoleberis margaritopsis
                      Xestoleberis nitida
                      Xestoleberis parva
                      Xestoleberis pellucida
                      Xestoleberis perrula
                      Xestoleberis plana
                      Xestoleberis rara
                      Xestoleberis rubens
                      Xestoleberis ventricosa
                      Xestoleberis lenae
                      Xestoleberis toni
                      Xestoleberis grevei
                      Xestoleberis meridionalis
                      Xestoleberis rigusa
                      Xestoleberis kerguelensis
                      Xestoleberis chilensis
                      Xestoleberis ventribullata
                      Xestoleberis curassavica
                      Xestoleberis punctata
                      Xestoleberis bluemeli
                      Xestoleberis abyssoris
                      Xestoleberis acuminalis
                      Xestoleberis acutipenis
                      Xestoleberis arcturi
                      Xestoleberis africana
                      Xestoleberis angustimarginata
                      Xestoleberis arotron
                      Xestoleberis atra
                      Xestoleberis baja
                      Xestoleberis bahialauraensis
                      Xestoleberis briggsi
                      Xestoleberis broomensis
                      Xestoleberis bulbous
                      Xestoleberis capensis
                      Xestoleberis cauticola
                      Xestoleberis cedunaensis
                      Xestoleberis chaoershuni
                      Xestoleberis chipanae
                      Xestoleberis compressa
                      Xestoleberis cornelii
                      Xestoleberis crenulata
                      Xestoleberis curta
                      Xestoleberis cypria
                      Xestoleberis darwinensis
                      Xestoleberis datelinensis
                      Xestoleberis davidiana
                      Xestoleberis dentata
                      Xestoleberis duemaculata
                      Xestoleberis dichatoensis
                      Xestoleberis dispar
                      Xestoleberis dougiamasorum
                      Xestoleberis duo
                      Xestoleberis dunsboroughensis
                      Xestoleberis entrichos
                      Xestoleberis eulitoralis
                      Xestoleberis exmouthensis
                      Xestoleberis expansa
                      Xestoleberis ferax
                      Xestoleberis fecaloidea
                      Xestoleberis foveolata
                      Xestoleberis fracticorallicola
                      Xestoleberis geraldtonensis
                      Xestoleberis guangdongensis
                      Xestoleberis gracilis
                      Xestoleberis grave
                      Xestoleberis giraulensis
                      Xestoleberis hanaii
                      Xestoleberis hawaiiensis
                      Xestoleberis hopkinsi
                      Xestoleberis ikeyai
                      Xestoleberis insulanos
                      Xestoleberis intermedia
                      Xestoleberis ishizakii
                      Xestoleberis iturupica
                      Xestoleberis kalbarriensis
                      Xestoleberis kalibengensis
                      Xestoleberis kuroshio
                      Xestoleberis kyrtonos
                      Xestoleberis limbata
                      Xestoleberis ligastrillia
                      Xestoleberis luandensis
                      Xestoleberis luxata
                      Xestoleberis maculata
                      Xestoleberis magnoculus
                      Xestoleberis malaysiana
                      Xestoleberis monyui
                      Xestoleberis nana
                      Xestoleberis nemusprevelliensis
                      Xestoleberis notoensis
                      Xestoleberis okinawensis
                      Xestoleberis olivacea
                      Xestoleberis onslowensis
                      Xestoleberis opalescenta
                      Xestoleberis oppoae
                      Xestoleberis oslacunaenis
                      Xestoleberis pachymenica
                      Xestoleberis paraporthedlandensis
                      Xestoleberis planuventer
                      Xestoleberis polita
                      Xestoleberis polys
                      Xestoleberis porilinguata
                      Xestoleberis portaugustensis
                      Xestoleberis porthedlandensis
                      Xestoleberis posidonicola
                      Xestoleberis posterovitrea
                      Xestoleberis praiatofensis
                      Xestoleberis profundis
                      Xestoleberis puntaperonensis
                      Xestoleberis pusilla
                      Xestoleberis quasirotunda
                      Xestoleberis quercallia
                      Xestoleberis ramosa
                      Xestoleberis rangiroaensis
                      Xestoleberis rhomboidea
                      Xestoleberis rigbyi
                      Xestoleberis rotunda
                      Xestoleberis rubrimaris
                      Xestoleberis ryukyuensis
                      Xestoleberis sagamiensis
                      Xestoleberis saxumchinensis
                      Xestoleberis scammonensis
                      Xestoleberis sesokoensis
                      Xestoleberis setigera
                      Xestoleberis setouchiensis
                      Xestoleberis sexmaculata
                      Xestoleberis shutzi
                      Xestoleberis simplex
                      Xestoleberis subarcuata
                      Xestoleberis suetsumuhana
                      Xestoleberis sunwui
                      Xestoleberis symmetrica
                      Xestoleberis tantabiddycreekensis
                      Xestoleberis tetragonos
                      Xestoleberis tigrina
                      Xestoleberis trimaculata
                      Xestoleberis tumefacta
                      Xestoleberis ukbani
                      Xestoleberis umbonata
                      Xestoleberis variegata
                      Xestoleberis wuchien
                      Xestoleberis xaixaiensis
                      Xestoleberis yambaensis
                      Xestoleberis yuchiae
                      Xestoleberis sulcata
                      Xestoleberis basiplana
                      Xestoleberis birkenmajeri
                      Xestoleberis granulosa
                      Xestoleberis paratruncata
                      Xestoleberis reniformis
                  Semixestoleberis
                  Castanoleberis
                  Foveoleberis
                  Ornatoleberis
                  Platyleberis
                  Prunicythere
                  Tanchuanoleberis
                  Uroleberis
                  Paraxestoleberis
                Xestoleberidae
                Terrestricytheridae
                Entocytheridae
                Australocytherideidae
                Cobanocytheridae
                Cytheralisonidae
                Kliellidae
                Osticytheridae
                Paracytheridae
                Parvocytheridae
                Pectocytheridae
                Protocytheridae
                Psammocytheridae
                Saididae
                Schizocytheridae
                Speluncellidae
                Thaerocytheridae
                Bonaducecytheridae
                Progonocytheridae
                Flexuocythere
            Cypridocopina
            Sigilliocopina
          Platycopida
          Palaeocopida
        Palaeocopa
      Pentastomata
    Chelicerata
    Myriapoda
    Hexapoda
  Ctenophora
  Cnidaria
  Sipuncula
  Echiura
  Pogonophora
  Entoprocta
  Tardigrada
  Phoronida
  Brachiopoda
  Echinodermata
  Hemichordata
  Chordata
  Gastrotricha
  Chaetognatha
  Ectoprocta
  Mesozoa
  Rotifera
  Gnathostomulida
  Acanthocephala
  Cycliophora
  Cephalorhyncha
  Placozoa
  Bryozoa
  Myxozoa
  Sipunculida
  Pentastomida
  Nemertini
Plantae
Fungi
Protozoa
Bacteria
Chromista
Archaea
Viruses
Monera