Between brackets is the number of accepted extant species
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Shows the number of accepted extant species within the taxon
The last expanded taxon is highlighted
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- Biota (12 686)
- Kingdom Animalia (9 792)
- Phylum Acanthocephala (30)
- Phylum Annelida (618)
- Phylum Arthropoda (4 265)
- Phylum Brachiopoda (64)
- Phylum Bryozoa (363)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (25)
- Phylum Chordata (1 415)
- Phylum Cnidaria (460)
- Phylum Ctenophora (11)
- Phylum Dicyemida (1)
- Phylum Echinodermata (638)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta
- Phylum Gastrotricha (1)
- Phylum Gnathostomulida
- Phylum Hemichordata (6)
- Phylum Kinorhyncha (9)
- Phylum Loricifera
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (753)
- Phylum Nematoda (396)
- Phylum Nemertea (75)
- Phylum Nemertina represented as Nemertea
- Phylum Platyhelminthes (134)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (281)
- Phylum Priapulida (4)
- Phylum Rotifera (163)
- Class Eurotatoria (163)
- Subclass Bdelloidea (49)
- Subclass Monogononta (114)
- Superorder Gnesiotrocha (9)
- Superorder Pseudotrocha (105)
- Order Ploima (105)
- Family Brachionidae Ehrenberg, 1838 (21)
- Genus Brachionus Pallas, 1766 (7)
- Genus Kellicottia Ahlstrom, 1938 (1)
- Genus Keratella Bory de St. Vincent, 1822 (6)
- Genus Notholca Gosse, 1886 (7)
- Species Notholca foliacea (Ehrenberg, 1838)
- Species Notholca hollowdayi Dartnall, 1995
- Species Notholca jugosa Gosse, 1887
- Species Notholca labis Gosse, 1887
- Species Notholca salina Focke, 1961 †
- Species Notholca squamula (Müller, 1786)
- Species Notholca verae Kutikova, 1958
- Species Notholca walterkostei José de Paggi, 1982
- Subspecies Notholca walterkostei reducta Dartnall & Hollowday, 1985
- Family Dicranophoridae Harring, 1913 (17)
- Family Epiphanidae Harring, 1913 (4)
- Family Euchlanidae Ehrenberg, 1838 (3)
- Family Lecanidae Remane, 1933 (7)
- Family Lepadellidae Harring, 1913 (15)
- Family Lindiidae Harring & Myers, 1924 (1)
- Family Mytilinidae Harring, 1913 (2)
- Family Notommatidae Hudson & Gosse, 1886 (21)
- Family Proalidae Harring & Myers, 1924 (6)
- Family Scaridiidae (Müller, 1786) (1)
- Family Synchaetidae Hudson & Gosse, 1886 (1)
- Family Trichocercidae Harring, 1913 (6)
- Phylum Tardigrada (80)
- Kingdom Archaea (1)
- Kingdom Bacteria (310)
- Kingdom Chromista (956)
- Kingdom Fungi (740)
- Kingdom Plantae (822)
- Kingdom Protozoa (65)
