 Natura - nature | | Mundus Plinius - physical world | | Naturalia - natural bodies | | Biota | | Domain Eukaryota Chatton, 1925 - eukaryotes | | Unikonta | | Opisthokonta Cavalier-Smith, 1987 | | Holozoa | | Kingdom Animalia C. Linnaeus, 1758 - animals | | Epitheliozoa Ax, 1996 | | Eumetazoa Bütschli, 1910 - eumetazoans | | Bilateria Hatschek, 1888 - bilaterians | | Eubilateria Ax, 1987 | | Protostomia Grobben, 1908 | | Lophotrochozoa K.M. Halanych et al., 1995 - lophotrochozoans | | Spiralia - spiralians | | Trochozoa Beklemischev, 1944 - trochozoans | | Phylum Annelida Lamarck, 1809 - segmented worms | | Class Polychaeta Grube, 1850 - polychaetes | | Order Scolecida |  Family Scalibregmatidae Malmgren, 1867 |  Genus Asclerocheilus Ashworth, 1901 | | Genus Axiokebutia | | Genus Cryptosclerocheilus Blake, 1972 |  Genus Hyboscolex Schmarda, 1861 | | Genus Kebuita Chamberlin, 1919 | | Genus Neolipobranchius Hartman & Fauchald, 1971 | | Genus Oligobregma Kudenov & Blake, 1978 | | Genus Parasclerocheilus Fauvel, 1928 | | Genus Polyphysia Quatrefages, 1865 | | Genus Pseudoscalibregma Ashworth, 1901 | | Genus Scalibregma™
Rathke, 1843 | | Genus Scalibregmella Hartman & Fauchald, 1971 | | Genus Scalibregmides Hartmann-Schröder, 1965 | | Genus Sclerobregma Hartman, 1965 | | Genus Sclerocheilus Grube, 1853 | | Genus Speleobregma Bertelsen, 1986 |
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