Between brackets is the number of accepted species
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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
- Subphylum Cephalochordata
- Subphylum Tunicata accepted as Urochordata
- Subphylum Urochordata
- Class Appendicularia
- Order Appendicularia (awaiting allocation)
- Order Copelata
- Family Fritillaridae accepted as Fritillariidae Lohmann, 1915
- Family Fritillariidae Lohmann, 1915
- Family Kowalevskiidae Lahille, 1888
- Family Kowalewskiidae accepted as Kowalevskiidae Lahille, 1888
- Family Oikopleuridae Lohmann, 1915
- Genus Althoffia Lohmann, 1892
- Genus Appendicularia Chamisso & Eysenhardt, 1821 accepted as Oikopleura Mertens, 1830
- Genus Balhochordaes accepted as Bathochordaeus Chun, 1900
- Genus Bathochordaeus Chun, 1900
- Genus Bathocordaeus
- Genus Caudostegosoma Rivaz Hernández, 2020
- Genus Chunopleura Lohmann, 1914
- Genus Coecaria Lohmann in Kükenthal & Krumbach, 1933
- Genus Folia Lohmann, 1892
- Genus Fretillaria Agassiz, 1842 accepted as Oikopleura Mertens, 1830
- Genus Fritillaria Huxley, 1851 accepted as Oikopleura Mertens, 1830
- Genus Haplopleura Berrill, 1950
- Genus Inopinata Fenaux & Youngbluth, 1991
- Genus Megalocercus Chun, 1887
- Genus Mesochordaeus Fenaux & Youngbluth, 1990
- Genus Mesoikopleura Fenaux, 1993
- Species Mesoikopleura enterospira Fenaux, 1993
- Species Mesoikopleura gyroceanis Fenaux, 1993
- Species Mesoikopleura haranti (Vernières, 1934)
- Species Mesoikopleura youngbluthi Fenaux, 1993
- Genus Mesopelagica Fenaux & Youngbluth, 1991
- Genus Oecopleura Agassiz, 1846 accepted as Oikopleura Mertens, 1830
- Genus Oekopleura Maitland, 1897 accepted as Oikopleura Mertens, 1830
- Genus Oicopleura Agassiz, 1846 accepted as Oikopleura Mertens, 1830
- Genus Oikomicron Swainson, 1891
- Genus Oikomikron Swainson, 1890
- Genus Oikopleura Mertens, 1830
- Genus Pelagopleura Lohmann in Lohmann & Buckmann, 1926
- Genus Sinisteroffia Tokioka, 1957
- Genus Stegosoma Chun, 1887 accepted as Caudostegosoma Rivaz Hernández, 2020
- Genus Venillaria Huxley, 1854 accepted as Oikopleura Mertens, 1830
- Genus Vexillaria Müller, 1846 accepted as Oikopleura Mertens, 1830
- Genus Vexillaria Lohmann, 1933 accepted as Oikopleura Mertens, 1830
- Class Ascidiacea
- Class Thaliacea
- Class Urochordata (awaiting allocation)
- Genus Chaonites Passy, 1832 † accepted as Choanites Mantell, 1822 †
- Genus Choanites Mantell, 1822 †
- Genus Megasiphon Nanglu, Lerosey-Aubril, Weaver & Ortega-Hernández, 2023 †
- Subphylum Vertebrata
- Class Chordata (awaiting allocation)
- Class Eotetrapodiformes incertae sedis
- Phylum Cnidaria
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia 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
- 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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