Between brackets is the number of accepted species
1 Click on "-" to collapse/hide all child taxa
2 Shows the number of accepted species within the taxon
3 The last expanded taxon is highlighted
4 Click on "+" to expand/show all child taxa
5 Click to see the taxon details page
- Biota
- Kingdom Animalia
- Phylum Acanthocephala
- Phylum Agmata †
- Phylum Animalia (awaiting allocation)
- Phylum Animalia incertae sedis
- Phylum Annelida
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Phylum Cnidaria
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia incertae sedis
- Phylum Ecdysozoa incertae sedis †
- Phylum Echinodermata
- Phylum Entoprocta
- Phylum Gastrotricha
- Phylum Gnathostomulida
- Phylum Hemichordata
- Phylum Hyolitha †
- Phylum Kinorhyncha
- Phylum Lobopoda †
- Phylum Loricifera
- Phylum Micrognathozoa
- Phylum Mollusca
- Phylum Monoblastozoa accepted as Animalia incertae sedis
- Phylum Nematoda
- Phylum Nematomorpha
- Phylum Nemertea
- Phylum Onychophora
- Phylum Orthonectida
- Phylum Phoronida
- Phylum Placozoa
- Phylum Platyhelminthes
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera
- Phylum Priapula accepted as Priapulida
- Phylum Priapulida
- Phylum Problematica † accepted as Animalia incertae sedis
- Phylum Rhombozoa
- Phylum Rotifera
- Phylum Scalidophora incertae sedis
- Phylum Sipuncula
- Phylum Tardigrada
- Phylum Trace fossils †
- Phylum Vendobionta †
- Phylum Vestimentifera accepted as Siboglinidae Caullery, 1914
- Phylum Vetulicolia †
- Phylum Vinctiplicata incertae sedis †
- Phylum Xenacoelomorpha
- Subphylum Acoelomorpha
- Class Acoela
- Family Actinoposthiidae Hooge, 2001
- Genus Actinoposthia An der Lan, 1936
- Genus Archactinoposthia Dörjes, 1968
- Genus Atriofronta Dörjes, 1968
- Genus Childianea Faubel & Cameron, 2001
- Genus Cyrtomorpha Graff, 1882
- Genus Microposthia Faubel, 1974
- Genus Paractinoposthia Ehlers & Dörjes, 1981
- Genus Paraproporus Westblad, 1945
- Genus Pseudactinoposthia Dörjes, 1968
- Species Pseudactinoposthia daena (Marcus, 1954)
- Species Pseudactinoposthia granaria Dörjes, 1968
- Species Pseudactinoposthia parva Ehlers & Dörjes, 1979
- Species Pseudactinoposthia saltans Dörjes, 1968
- Species Pseudactinoposthia sanguineum (Beklemischev, 1915)
- Genus Tetraposthia An der Lan, 1936
- Family Anaperidae Dörjes, 1968 accepted as Convolutidae Graff, 1905
- Family Anthroposthiidae accepted as Antroposthiidae Faubel, 1976
- Family Antigonariidae Dörjes, 1968
- Family Antroposthidae accepted as Antroposthiidae Faubel, 1976
- Family Antroposthiidae Faubel, 1976
- Family Aphanostomidae
- Family Childiidae Dörjes, 1968 accepted as Mecynostomidae Dörjes, 1968
- Family Convolutidae Graff, 1905
- Family Dakuidae Hooge, 2003
- Family Diopisthoporidae Westblad, 1940
- Family Hallangidae accepted as Hallangiidae Westblad, 1946
- Family Hallangiidae Westblad, 1946
- Family Haploposthiidae Westblad, 1948 accepted as Proporidae von Graff, 1882
- Family Hofsteniidae Bock, 1923
- Family Isodiametridae Hooge & Tyler, 2005
- Family Mecynostomidae Dörjes, 1968
- Family Myostomellidae Riedl, 1954
- Family Nadinidae Dörjes, 1968
- Family Otocelidae accepted as Otocelididae Westblad, 1948
- Family Otocelididae Westblad, 1948
- Family Paratomellidae Dörjes, 1966
- Family Polycanthiidae Hooge, 2003 accepted as Proporidae Sokolov, 1949 †
- Family Proporidae von Graff, 1882
- Family Sagittiferidae Kostenko & Mamkaev, 1990 accepted as Convolutidae Graff, 1905
- Family Solenofilomorphidae Dörjes, 1968
- Family Taurididae Kostenko, 1989
- Class Nemertodermatida
- Subphylum Xenoturbellida
- Genus Trilobocaris Pribyl, 1953 †
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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