 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 Capitellidae Grube, 1862 |  Genus Amastigos Piltz, 1977 | | Genus Anotomastus Hartman, 1947 |  Genus Baldia Garwood & Bamber, 1988 | | Genus Capitella™
de Blainville, 1828 | | Genus Capitellethus Chamberlin, 1919 | | Genus Capitellides | | Genus Capitomastus Eisig, 1887 | | Genus Dasybranchus Grube, 1850 | | Genus Decamastus Hartman, 1963 | | Genus Eisigella Gravier, 1901 | | Genus Heteromastus McIntosh, 1885 | | Genus Leiocapitella Hartman, 1947 | | Genus Leiochrides Augener, 1914 | | Genus Mastobranchus Eisig, 1887 | | Genus Mediomastus Hartman, 1944 | | Genus Neoheteromastus Hartman, 1960 | | Genus Neomediomastus Hartman, 1969 | | Genus Neonotomastus Fauchald, 1972 | | Genus Neopseudocapitella Rullier & Amoureux, 1979 | | Genus Notodasus Fauchald, 1972 | | Genus Notomastus Sars, 1851 | | Genus Paracapitella | | Genus Paraleiocapitella Thomassin, 1970 | | Genus Peresiella | | Genus Pseudocapitella Fauvel, 1913 | | Genus Pseudoleiocapitella | | Genus Pseudomastus Capaccioni-Azzati & Martin, 1992 | | Genus Pseudonotomastus Warren & Parker, 1994 | | Genus Pulliella Fauvel, 1929 | | Genus Scyphoproctus Gravier, 1904 |
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