List of annelid families describes the taxa relationships in the phylum Annelida, which contains more than 17,000 extant species including ragworms, earthworms, and leeches.
Class Polychaeta
Palpata Sub-class Errantia Order Amphinomida Family Amphinomidae Savigny in Lamarck, 1818 нЖсн Family Euphrosinidae Williams, 1851 Order Eunicida Family Dorvilleidae Chamberlin, 1919 Family Eunicidae Berthold, 1827 Family Hartmaniellidae Imajima, 1977 Family Lumbrineridae Schmarda, 1861 Family Oenonidae Kinberg, 1865 Family Onuphidae Kinberg, 1865 Order Phyllodocida Family Acoetidae Kinberg, 1856 Family Alciopidae Ehlers, 1864 Family Aphroditidae Malmgren, 1867 Family Chrysopetalidae Ehlers, 1864 Family Eulepethidae Chamberlin, 1919 Family Glyceridae Grube, 1850 Family Goniadidae Kinberg, 1866 Family Hesionidae Grube, 1850 Family Ichthyotomidae Eisig, 1906 Family Iospilidae Bergstroem, 1914 Family Lacydoniidae Bergstroem, 1914 Family Lopadorrhynchidae Claparede, 1868 Family Myzostomatidae Benham, 1896 Family Nautiliniellidae Miura and Laubier, 1990 Family Nephtyidae Grube, 1850 Family Nereididae Johnston, 1865 Family Paralacydoniidae Pettibone, 1963 Family Pholoidae Kinberg, 1858 Family Phyllodocidae Oersted, 1843 Family Pilargidae Saint-Joseph, 1899 Family Pisionidae Southern, 1914 Family Polynoidae Malmgren, 1867 Family Pontodoridae Bergstroem, 1914 Family Sigalionidae Malmgren, 1867 Family Sphaerodoridae Malmgren, 1867 Family Syllidae Grube, 1850 Family Tomopteridae Johnston, 1865 Family Typhloscolecidae Uljanin, 1878 Incertae sedis Family Aberrantidae Wolf, 1987 Family Nerillidae Levinsen, 1883 Family Spintheridae Johnston, 1865 Canalipalpata
Scolecida
Family Aeolosomatidae Family Arenicolidae Family Capitellidae Family Cossuridae Family Maldanidae Family Opheliidae Family Orbiniidae Family Paraonidae Family Parergodrilidae Family Potamodrilidae Family Psammodrilidae Family Questidae Family Scalibregmatidae
Echiura
Order Echiuroidea Suborder Bonelliida Family Bonelliidae Family Ikedidae Suborder Echiurida Family Echiuridae Family Thalassematidae Family Urechidae
Class Clitellata Order Branchiobdellida Subclass Hirudinea (Leech) Infraclass Acanthobdellidea Infraclass Euhirudinea Order Arhynchobdellida Suborder Erpobdelliformes Family Erpobdellidae Blanchard, 1894 Family Gastrostomobdellidae Richardson, 1971 Family Orobdellidae Nakano, Ramlah & Hikida, 2012 Family Salifidae Johansson, 1910 Suborder Hirudiniformes Family Cylicobdellidae Family Haemadipsidae Family Haemopidae Family Hirudinidae Family Semiscolecidae Family Xerobdellidae Order Rhynchobdellida Family Glossiphoniidae Family Ozobranchidae (disputed) Family Piscicolidae Order Haplotaxida Suborder Haplotaxina Family Haplotaxidae Suborder Moniligastrina Family Moniligastridae Suborder Lumbricina Family Alluroididae Family Eudrilidae Family Glossoscolecidae Family Lumbricidae Family Hormogastridae Family Ailoscolidae Family Lutodrilidae Family Sparganophilidae Family Criodrilidae Family Ocnerodrilidae Family Acanthodrilidae Family Octochaetidae Family Exxidae Family Megascolecidae Family Microchaetidae Suborder Tubificina Family Dorydrilidae Family Enchytraeidae Family Naididae Family Opstocystidae Family Phreodrilidae
Class Machaeridia † Family †Plumulitidae Family †Turrilepadidae Family †Lepidocoleidae
Subphylum Sipuncula Class Phascolosomatidea Order Aspidosiphoniformes Family Aspidosiphonidae Order Phascolosomatiformes Family Phascolosomatidae Class Sipunculidea Order Golfingiiformes Family Golfingiidae Family Phascolionidae Family Themistidae Order Sipunculiformes Family Sipunculidae
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