Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
     Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
       Subclass Copepoda H. Milne-Edwards, 1840 - copepods
         Infraclass Neocopepoda Huys & Boxshall, 1991
           Superorder Podoplea Giesbrecht, 1882
             Order Poecilostomatoida Thorell, 1859
               01 Family Anchimolgidae Humes & Boxshall, 1996
               02 Family Anomoclausiidae Gotto, 1964
               03 Family Antheacheridae M. Sars, 1870
               04 Family Anthessiidae Humes, 1986
               05 Family Bomolochidae Sumpf, 1871
               06 Family Catiniidae Bocquet & Stock, 1957
               07 Family Chitonophilidae Avdeev & Sirenko, 1991
               08 Family Chondracanthidae H. Milne Edwards, 1840
               09 Family Clausidiidae Embleton, 1901
               10 Family Clausiidae Giesbrecht, 1895
               11 Family Corallovexiidae Stock, 1975
               12 Family Corycaeidae Dana, 1852
               13 Family Echiurophilidae Delamare-Deboutteville & Nunes-Ruivo, 1955
               14 Family Entobiidae Ho, 1984
               15 Family Erebonasteridae Humes, 1987
               16 Family Ergasilidae von Nordmann, 1832
               17 Family Eunicicolidae G.O. Sars, 1918
               18 Family Gastrodelphyidae List, 1889
               19 Family Herpyllobiidae Hansen, 1892
               20 Family Intramolgidae Marchenkov & Boxshall, 1995
               21 Family Kelleriidae Humes & Boxshall, 1996
               22 Family Lamippidae Joliet, 1882
               23 Family Lernaeosoleidae Yamaguti, 1963
               24 Family Lichomolgidae Kossmann, 1877
               25 Family Lubbockiidae Huys & Böttger-Schnack, 1997
               26 Family Macrochironidae Humes & Boxshall, 1996
               27 Family Mesoglicolidae de Zulueta, 1911
               28 Family Micrallectidae Huys, 2001
               29 Family Myicolidae Yamaguti, 1936
               30 Family Mytilicolidae Bocquet & Stock, 1957
               31 Family Nereicolidae Claus, 1875
               32 Family Nucellicolidae Lamb et al., 1996 see Family Chitonophilidae Avdeev & Sirenko, 1991
               33 Family Octopicolidae Humes & Boxshall, 1996
               34 Family Oncaeidae Giesbrecht, 1892[1893]
               35 Family Paralubbockiidae Boxshall & Huys, 1989
               36 Family Pharodidae Illg, 1948 see Family Chondracanthidae H. Milne Edwards, 1840
               37 Family Philichthyidae Vogt, 1877
               38 Family Philoblennidae Izawa, 1976
               39 Family Phyllodicolidae Delamare-Deboutteville & Laubier, 1961
               40 Family Polyankylidae Ho & I.H. Kim, 1997
               41 Family Pseudanthessiidae Humes & Stock, 1972
               42 Family Rhynchomolgidae Humes & Stock, 1972
               43 Family Sabelliphilidae Gurney, 1927
               44 Family Saccopsidae Lützen, 1964
               45 Family Sapphirinidae Thorell, 1860
               46 Family Serpulidicolidae Stock, 1979
               47 Family Shiinoidae Cressey, 1975
               48 Family Spiophanicolidae J.-S. Ho, 1984
               49 Family Splanchnotrophidae Norman & T. Scott, 1906
               50 Family Synapticolidae Humes & Boxshall, 1996
               51 Family Synaptiphilidae Bocquet, 1953
               52 Family Taeniacanthidae C.B. Wilson, 1911
               53 Family Tegobomolochidae Avdeev, 1978
               54 Family Telsidae Ho, 1967
               55 Family Thamnomolgidae Humes & Boxshall, 1996
               56 Family Tuccidae Vervoort, 1962
               57 Family Urocopiidae Humes & Stock, 1972
               58 Family Vahiniidae Humes, 1967
               59 Family Ventriculinidae Leigh-Sharpe, 1934
               60 Family Xarifiidae Humes, 1960
               61 Family Xenocoelomatidae Bresciani & Lützen, 1966