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
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- 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
- Class Adenophorea
- Class Aphasmida
- Class Chromadorea
- Order Aphelenchida accepted as Panagrolaimida
- Order Ascaridida accepted as Spirurida
- Order Benthimermithida
- Order Camallanida accepted as Spirurida
- Order Chromadorida
- Order Desmodorida
- Family Aponchiidae Gerlach, 1963
- Family Desmodoridae Filipjev, 1922
- Family Draconematidae Filipjev, 1918
- Genus Apenodraconema Allen & Noffsinger, 1978
- Genus Bathychaetosoma Decraemer, Gourbault & Backeljau, 1997
- Genus Cephalochaetosoma Kito, 1983
- Genus Chaetosoma Claparède, 1863 accepted as Drepanonema Cobb, 1933
- Genus Choetosoma Villot, 1875 accepted as Drepanonema Cobb, 1933
- Genus Claparediella Filipjev, 1934 accepted as Drepanonema Cobb, 1933
- Genus Cygnonema Allen & Noffsinger, 1978
- Genus Dinetia Decraemer & Gourbault, 1997
- Genus Dracogalerus Allen & Noffsinger, 1978
- Genus Dracognomus Allen & Noffsinger, 1978
- Genus Dracograllus Allen & Noffsinger, 1978
- Genus Draconactus Allen & Noffsinger, 1978
- Genus Draconema Cobb, 1913
- Genus Dracotoranema Allen & Noffsinger, 1978
- Genus Drepanonema Cobb, 1933 accepted as Draconema Cobb, 1913
- Genus Eudraconema Bussau, 1993
- Genus Megadraconema Rho, Decraemer, Sørensen, Min, Jung & Kim, 2011
- Genus Notochaetosoma Irwin-Smith, 1918
- Genus Paradraconema Allen & Noffsinger, 1978
- Genus Prochaetosoma Baylis & Daubney, 1926
- Genus Prochaetosoma Micoletzky, 1922
- Genus Rhabdogaster Metschnikoff, 1867 accepted as Prochaetosoma Baylis & Daubney, 1926
- Genus Tenuidraconema Decraemer, 1989
- Genus Tristicochaeta Panceri, 1878 accepted as Drepanonema Cobb, 1933
- Species Tristicochaeta inarimensis Panceri, 1876 accepted as Drepanonema inarimense Panceri, 1876
- Family Epsilonematidae Steiner, 1927
- Family Microlaimidae De Coninck & Schuurmans Stekhoven, 1933
- Family Molgolaimidae Jensen, 1978 accepted as Desmodoridae Filipjev, 1922
- Family Monoposthiidae De Coninck, 1965
- Family Prochaetosomatidae Allen & Noffsinger, 1978 accepted as Draconematidae Filipjev, 1918
- Family Spirinidae accepted as Desmodoridae Filipjev, 1922
- Family Spiriniidae Gerlach & Murphy, 1965 accepted as Desmodoridae Filipjev, 1922
- Order Desmoscolecida
- Order Diplogasterida
- Order Draconematina accepted as Desmodorida
- Order Drilonematida
- Order Filariidea accepted as Spirurida
- Order Leptolaimida
- Order Monhysterida
- Order Oxyurida accepted as Spirurida
- Order Panagrolaimida
- Order Plectida
- Order Rhabditida
- Order Selachinematida
- Order Spirurida
- Order Strongylida accepted as Panagrolaimida
- Order Teratocephalida
- Order Tylenchida accepted as Panagrolaimida
- Class Dorylaimea
- Class Enoplea
- Class Nematoda (awaiting allocation)
- Class Nematoda incertae sedis
- Class Rhabditea
- Class Secernentea
- 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
- 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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