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
- Order Polycladida
- Order Prolecithophora
- Order Proplicastomata
- Order Proseriata
- Family Archimonocelididae
- Family Bothrioplanidae Vejdovsky, 1895
- Family Coelogynoporidae Karling, 1966
- Family Ectocotylidae accepted as Monocelididae Hofsten, 1907
- Family Lithophora incertae sedis
- Family Monocelididae Hofsten, 1907
- Family Monotoplanidae Ax, 1958
- Family Nematoplanidae Meixner, 1938
- Family Nemertoplanidae
- Family Otomesostomatidae Hofsten, 1907
- Family Otomesostomidae
- Family Otoplanidae Hallez, 1892
- Genus Alaskaplana Ax & Armonies, 1990
- Genus Americanaplana Ax & Ax, 1967
- Genus Archotoplana Ax, 1956
- Genus Boreusyrtis Lukhnev & Timoshkin, 2017
- Genus Bothriomolus Hallez, 1909
- Genus Bulbotoplana Ax, 1956
- Genus Cirroplana Miller & Faubel, 2003
- Genus Dicoelandropora Ax, 1956
- Genus Galapagoplana Ax & Ax, 1974
- Genus Itaspiella Ax, 1956
- Genus Itaspis Marcus, 1952
- Genus Kata Marcus, 1949
- Genus Kataplana Ax, 1956
- Genus Lauraplana Miller & Faubel, 2003
- Genus Monostichoplana Ax, 1956
- Genus Napoliplana Ax, Weidemann & Ehlers, 1978
- Genus Notocaryoplana Steinböck, 1935
- Genus Notocaryoplanella Ax, 1956 accepted as Notocaryoplana Steinböck, 1935
- Genus Notocaryoturbella Lanfranchi, 1969
- Genus Orthoplana Kohler, 1933
- Genus Orthoplana Steinböck, 1932
- Genus Otoplana Du Plessis, 1889
- Genus Otoplanella Ax, 1956
- Genus Otoplanidarum
- Genus Otoplanidia Meixner, 1938
- Genus Paradoxoplana Ax, 1956
- Genus Paraplana Ax, 1956
- Genus Paratoplana accepted as Parotoplana Meixner, 1938
- Genus Parotoplana Meixner, 1938
- Genus Parotoplanella Ax, 1956
- Genus Parotoplanina Ax, 1956
- Genus Philosyrtis Giard, 1904
- Species Philosyrtis armoricae Sopott-Ehlers, 1985
- Species Philosyrtis coomansi Martens & Schockaert, 1981
- Species Philosyrtis eumeca Marcus, 1950
- Species Philosyrtis fennica Ax, 1954
- Species Philosyrtis germanica Meixner, 1938 accepted as Kataplana germanica Ax, 1951
- Species Philosyrtis monotoides Giard, 1904
- Species Philosyrtis rauli Norena C, Damborenea & Brusa F, 2005
- Species Philosyrtis rotundicephala Sopott, 1972
- Species Philosyrtis rutilata Sopott-Ehlers, 1976
- Species Philosyrtis sanjuanensis Ax & Ax, 1967
- Species Philosyrtis santacruzensis Ax & Ax, 1974
- Genus Plessisia Graff, 1904-08 accepted as Otoplana Du Plessis, 1889
- Genus Pluribursaeplana Ax & Ax, 1967
- Genus Polyrhabdoplana Ax & Ax, 1967
- Genus Postbursoplana Ax, 1956
- Genus Praebursoplana Ax, 1956
- Genus Pseudorthoplana Ax, Weidemann & Ehlers, 1978
- Genus Pseudosyrtis Ax, 1956
- Genus Psilosyrtis accepted as Philosyrtis Giard, 1904
- Genus Serpentiplana Karling, 1964
- Genus Triporoplana Ax, 1956
- Genus Xenotoplana Ax, Weidemann & Ehlers, 1978
- Genus Zygotoplana Tajika, 1983
- Family Polystyliphoridae Ax, 1958
- Family Proseriata (awaiting allocation)
- Family Yorkniidae Scarpa, Cossu, Delogu, Lai, Sanna, Leasi, Norenburg, Curini-Galletti & Casu, 2017
- 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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