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
- Class Cestoda
- Class Platyhelminthes (awaiting allocation)
- Class Platyhelminthes incertae sedis
- Class Trematoda
- Class Turbellaria
- Order Catenulida
- Order Eukalyptorhynchia (awaiting allocation)
- Order Haplopharyngida
- Order Kalyptorhynchia (awaiting allocation)
- Order Lecithoepitheliata
- Order Macrostomida
- Order Neorhabdocoela
- Family Acholadidae Hickman & Olsen, 1955
- Family Aculeorhynchidae Schilke, 1969
- Family Bertiliellidae Rieger & Sterrer, 1975
- Family Byrsophlebidae Graff, 1905
- Family Carcharodopharyngidae Bresslau, 1928-33
- Family Cicerinidae Meixner, 1928
- Family Ciliopharyngiellidae Ax, 1952
- Family Crassicolidae
- Family Cystiplanidae Karling, 1964
- Family Cytocystidae Karling, 1964 accepted as Cytocystididae Karling, 1964
- Family Cytocystididae Karling, 1964
- Family Dalyellidae accepted as Dalyelliidae Graff, 1905
- Family Dalyelliidae Graff, 1905
- Genus Alexlutheria Karling, 1956
- Genus Austrodalyellia Hochberg & Cannon, 2002
- Genus Axia Luther, 1955 accepted as Axiola Luther, 1955
- Genus Axiola Luther, 1955
- Genus Beauchampiella Luther, 1955 accepted as Beauchampiola Luther, 1957
- Genus Beauchampiola Luther, 1957
- Genus Castrella Fuhrmann, 1900
- Genus Castrella Luther, 1955 accepted as Castrella Fuhrmann, 1900
- Genus Chonestomum Schmarda, 1859 accepted as Chonostomum Schmarda, 1859
- Genus Chonostoma Graff, 1882 accepted as Chonostomum Schmarda, 1859
- Genus Chonostomum Schmarda, 1859
- Genus Dalyellia Fleming, 1822 accepted as Dalyellia Gieysztor, 1938
- Genus Dalyellia Gieysztor, 1938
- Genus Dalyellioidarum Steinbock, 1948
- Genus Debeauchampiola
- Genus Fulinskiella Gieysztor & Szynal, 1939
- Genus Gieysztoria Ruebush & Hayes, 1939
- Genus Haplodidymos Hochberg & Cannon, 2002
- Genus Hypostomum Schmidt, 1848 accepted as Dalyellia Gieysztor, 1938
- Genus Marcusiella Luther, 1955
- Genus Mesovortex An der Lan, 1939 accepted as Dalyellioidarum Steinbock, 1948
- Genus Microdalyella
- Genus Microdalyellia Gieysztor, 1938
- Genus Microdalyellia Reubush & Hayes, 1939 accepted as Microdalyellia Gieysztor, 1938
- Genus Nasonoviella Luther, 1955 accepted as Castrella Fuhrmann, 1900
- Genus Neosergia Li, 2023
- Genus Nitschia Rathke, 1843 accepted as Nitzschia Baer, 1826
- Species Nitschia quadritestis
- Genus Nitychia Nordmann, 1833 † accepted as Nitzschia Baer, 1826
- Genus Nityschia Nordmann, 1833 † accepted as Nitzschia Baer, 1826
- Genus Nitzchia Gervais, 1846 † accepted as Nitzschia Baer, 1826
- Genus Polliculus Van Steeniste, Schockaert & Artois in Van Steenkiste, Volonterio, Schockaert & Artois, 2008
- Genus Pseudodalyellia Van Steenkiste, Gobert, Davison, Kolasa & Artois, 2011
- Genus Scoparia Gieysztor, 1933 accepted as Dalyellia Gieysztor, 1938
- Genus Scopariella Ruebush & Hayes, 1939 accepted as Dalyellia Gieysztor, 1938
- Genus Sergia Nasonov, 1923 accepted as Neosergia Li, 2023
- Genus Thalassovortex Papi, 1956
- Genus Vaillantiella Luther, 1955
- Genus Varsoviella Gieysztor & Wiszniewski, 1947
- Family Diascorhynchidae Meixner, 1929
- Family Diceratocephalidae Joffe, Cannon & Schockaert, 1998
- Family Didymorchidae
- Family Fecampiidae Graff, 1903
- Family Gnathorhynchidae Meixner, 1929
- Family Graffillidae Graff, 1904-08
- Family Hypoblepharinidae Bohmig, 1914
- Family Karkinorhynchidae Meixner, 1928
- Family Koinocystidae
- Family Kytorhynchidae Rieger, 1974
- Family Nematorhynchidae Schilke, 1969
- Family Notenteridae Joffe, Selivanova & Kornakova, 1997
- Family Placorhynchidae Meixner, 1938
- Family Polycystidae Meixner, 1924 accepted as Polycystididae Graff, 1905
- Family Promesostomidae Hartog, 1964
- Family Provorticidae Beklemischev, 1927
- Family Psammorhynchidae Karling, 1956
- Family Pterastericolidae Meixner, 1925
- Family Pterastricolidae
- Family Schizorhynchidae Graff, 1905
- Family Scutariellidae Annandale, 1912
- Family Solenopharyngidae Graff, 1882
- Family Temnocephalidae Monticelli, 1899
- Family Trigonostomidae Graff, 1905
- Family Typhloplanidae Graff, 1905
- Family Typhlorhynchidae
- Family Umagillidae Wahl, 1910
- Order Polycladida
- Order Prolecithophora
- Order Proplicastomata
- Order Proseriata
- Order Rhabdocoela
- Order Tricladida
- Order Turbellaria (awaiting allocation)
- 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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