The class Diplopoda consists of 2 subclasses, 16 orders, and 145 families. Forty-nine families, comprising around 213 genera and 910 nominal species, occur in North America (=the US and Canada), but hundreds more await description particularly in the families Glomeridae (Glomerida); Parajulidae (Julida); Atopetholidae (Spirobolida); Cleidogonidae, Trichopetalidae, and Striariidae (Chordeumatida); and Xystodesmidae, Polydesmidae, and Nearctodesmidae (Polydesmida). Of these 49 families, 39 are indigenous (17 of which are endemic), 5 are wholly introduced, and 5 contain both native and allochthonous species. As the Diplopoda is more speciose than the Chilopoda, the taxonomy is necessarily more complex, and additional categories are required: Infraclass, Subterclass, and Infraorders in the Polydesmida: Polydesmidea (see family-level classification below, taken from Shelley (2003)). Families represented in North America are marked with asterisks (*); "E" denotes an endemic family, "Int." one that is wholly introduced, and "N, I" one with both native and introduced species.

Class Diplopoda de Blainville in Gervais, 1844
 
Subclass Penicillata Latreille, 1831
              Order Polyxenida Verhoeff, 1934
                       Superfamily Polyxenoidea Lucas, 1840
                          Family Hypogexenidae Schubart, 1947
                          Family Lophoproctidae Silvestri, 1897
                          Family Polyxenidae Lucas, 1840*
                       Superfamily Synxenoidea Silvestri, 1923
                          Family Synxenidae Silvestri, 1923
 
Subclass Chilognatha Latreille, 1802/1803
     Infraclass Pentazonia Brandt, 1833
           Superorder Limacomorpha Pocock, 1894
              Order Glomeridesmida Cook, 1895
                          Family Glomeridesmidae Latzel, 1884
           Superorder Oniscomorpha Pocock, 1887
              Order Glomerida Brandt, 1833
                          Family Doderiidae Silvestri, 1904
                          Family Glomeridae Leach, 1815*
                          Family Glomeridellidae Cook, 1896
              Order Sphaerotheriida Brandt, 1833
                          Family Sphaerotheriidae C. L. Koch, 1847
                          Family Zephroniidae Gray in Jones, 1843
     
Infraclass Helminthomorpha Pocock, 1887
        Subterclass Colobognatha Brandt, 1834
              Order Platydesmida Cook, 1895
                          Family Andrognathidae Cope, 1869*
                          Family Platydesmidae DeSaussure, 1860
              Order Polyzoniida Cook, 1895
                          Family Hirudisomatidae Silvestri, 1896*
                          Family Polyzoniidae Newport, 1844*
                          Family Siphonotidae Cook, 1895* Int.
              Order Siphonocryptida Cook, 1895
                          Family Siphonocryptidae Pocock, 1894
              Order Siphonophorida Hoffman, 1980
                          Family Siphonophoridae Newport, 1844*
                          Family Siphonorhinidae Cook, 1895*
        Subterclass Eugnatha Attems, 1898
           Superorder Juliformia Attems, 1926
              Order Julida Brandt, 1833
                       Superfamily Blaniuloidea C. L. Koch, 1847
                          Family Blaniulidae C. L. Koch, 1847* N, I
                          Family Galliobatidae Brolemann, 1921
                          Family Okeanobatidae Verhoeff, 1942*
                          Family Zosteractinidae Loomis, 1943* E
                       Superfamily Juloidea Leach, 1814
                          Family Julidae Leach, 1814* Int.
                          Family Rhopaloiulidae Attems, 1926
                          Family Trichoblaniulidae Verhoeff, 1911
                          Family Trichonemasomatidae Enghoff, 1991
                       Superfamily Nemasomatoidea Bollman, 1893
                          Family Chelojulidae Enghoff, 1991* E
                          Family Nemasomatidae Bollman, 1893* N, I
                          Family Pseudonemasomatidae Enghoff, 1991
                          Family Telsonemasomatidae Enghoff, 1991* E
                       Superfamily Paeromopodoidea Cook, 1895
                          Family Aprosphylosomatidae Hoffman, 1961* E
                          Family Paeromopodidae Cook, 1895* E
                       Superfamily Parajuloidea Bollman, 1893
                          Family Mongoliulidae Pocock, 1903
                          Family Parajulidae Bollman, 1893*
              Order Spirobolida Cook, 1895
                 Suborder Spirobolidea Cook, 1895
                          Family Allopocockiidae Keeton, 1960*
                          Family Atopetholidae Chamberlin, 1918*
                          Family Floridobolidae Keeton, 1959* E
                          Family Hoffmanobolidae Shelley, 2001
                          Family Messicobolidae Loomis, 1968
                          Family Pseudospirobolellidae Brölemann, 1913
                          Family Rhinocricidae Brölemann, 1913
                          Family Spirobolellidae Brölemann, 1913
                          Family Spirobolidae Bollman, 1893*
                          Family Typhlobolellidae Hoffman, 1969
                 Suborder Trigoniulidea Brölemann, 1913
                          Family Pachybolidae Cook, 1897
                          Family Trigoniulidae Attems, 1909
              Order Spirostreptida Brandt, 1833
                 Suborder Cambalidea Cook, 1895
                          Family Cambalidae Bollman, 1893*
                          Family Cambalopsidae Cook, 1895
                          Family Glyphiulidae Chamberlin, 1922
                          Family Pericambalidae Silvestri, 1909
                 Suborder Epinannolenidea Chamberlin, 1922
                          Family Choctellidae Chamberlin & Hoffman, 1950* E
                          Family Iulomorphidae Verhoeff, 1924
                          Family Pseudonannolenidae Silvestri, 1895
                 Suborder Spirostreptidea Brandt, 1833
                       Superfamily Odontopygoidea Attems, 1909
                          Family Atopogestidae Hoffman, 1980
                          Family Odontopygidae Attems, 1909
                       Superfamily Spirostreptoidea Pocock, 1894
                          Family Adiaphorostreptidae Hoffman, 1977
                          Family Harpagophoridae Attems, 1909
                          Family Spirostreptidae Pocock, 1894*
           Superorder Nematophora Verhoeff, 1913
              Order Callipodida Pocock, 1894
                 Suborder Callipodidea Pocock, 1894
                          Family Callipodidae Bollman, 1893
                 Suborder Schizopetalidea Hoffman, 1973 
                          Family Abacionidae Shelley, 1979*
                          Family Caspiopetalidae Lohmander, 1931
                          Family Dorypetalidae Verhoeff, 1900
                          Family Paracortinidae Wang & Zhang, 1993
                          Family Schizopetalidae Verhoeff, 1909*
                 Suborder Sinocallipodidea Shear, 2000
                          Family Sinocallipodidae Zhang, 1993
              Order Chordeumatida Pocock, 1894
                 Suborder Chordeumatidea Pocock, 1894
                       Superfamily Chordeumatoidea C. L. Koch, 1847
                          Family Chordeumatidae C. L. Koch, 1847
                          ?Family Speophilosomatidae Takakuwa, 1949
                 Suborder Craspedosomatidea Cook, 1895
                       Superfamily Anthroleucosomatoidea Verhoeff, 1899
                          Family Anthroleucosomatidae Verhoeff, 1899
                          Family Haasiidae Hoffman, 1980
                          Family Origmatogonidae Verhoeff, 1914
                          Family Vandeleumatidae Mauriès, 1970
                       Superfamily Brannerioidea Cook, 1896
                          Family Brachychaeteumatidae Verhoeff, 1911
                          Family Branneriidae Cook, 1896* E
                          Family Chamaesomatidae Verhoeff, 1913
                          Family Golovatchiidae Shear, 1992
                          Family Heterolatzeliidae Verhoeff, 1899
                          Family Kashmireumatidae Mauriès, 1982
                          Family Microlympiidae Shear & Leonard, 2003* E
                          Family Macrochaeteumatidae Verhoeff, 1914
                          Family Niponiosomatidae Verhoeff, 1941
                          Family Tingupidae Loomis, 1966* E
                          Family Trachygonidae Cook, 1896
                       Superfamily Cleidogonoidea Cook, 1896
                          Family Biokoviellidae Mršic, 1992
                          Family Cleidogonidae Cook, 1896*
                          Family Entomobielziidae Verhoeff, 1899
                          Family Lusitaniosomatidae Schubart, 1953
                          Family Opisthocheiridae Ribaut, 1913
                          Family Trichopetalidae Verhoeff, 1914*
                       Superfamily Craspedosomatoidea Gray in Jones, 1843
                          Family Attemsiidae Verhoeff, 1899
                          Family Craspedosomatidae Gray in Jones, 1843* Int.
                          Family Haplobainosomatidae Verhoeff, 1909
                       Superfamily Haaseoidea Attems, 1899
                          Family Haaseidae Attems, 1899
                       Superfamily Mastigophorophylloidea Verhoeff, 1899
                          Family Altajellidae Mikhaljova & Golovatch, 2001
                       
  Family Hoffmaneumatidae Golovatch, 1978
                       
  Family Mastigophorophyllidae Verhoeff, 1899
                      
Superfamily Neoatractosomatoidea Verhoeff, 1901
                       
  Family Neoatractosomatidae Verhoeff, 1901
                      
Superfamily Verhoeffioidea Verhoeff, 1899
                          Family Verhoeffiidae Verhoeff, 1899
                 Suborder Heterochordeumatidea Shear, 2000
                       Superfamily Conotyloidea Cook, 1896
                          Family Adritylidae Shear, 1971* E
                          Family Conotylidae Cook, 1896*
                       Superfamily Diplomaragnoidea Attems, 1907
                          Family Diplomaragnidae Attems, 1907
                       Superfamily Heterochordeumatoidea Pocock, 1894
                          Family Eudigonidae Verhoeff, 1914
                          Family Heterochordeumatidae Pocock, 1894
                          Family Megalotylidae Golovatch, 1978
                          Family Metopidiotrichidae Attems, 1907
                          ?Family Peterjohnsiidae Mauriès, 1987
                       Superfamily Pygmaeosomatoidea Carl, 1941
                          Family Lankasomatidae Mauriès, 1978
                          Family Pygmaeosomatidae Carl, 1941
                 Suborder Striariidea Cook, 1896
                       Superfamily Caseyoidea Verhoeff, 1909
                          Family Caseyidae Verhoeff, 1909*
                          Family Urochordeumatidae Silvestri, 1909* E
                       Superfamily Striarioidea Bollman, 1893
                          Family Apterouridae Loomis, 1966* E
                          Family Rhiscosomididae Silvestri, 1909* E
                          Family Striariidae Bollman, 1893* E
              Order Stemmiulida Cook, 1895
                          Family Stemmiulidae Pocock, 1894
           Superorder Merocheta Cook, 1895
              Order Polydesmida Pocock, 1887
                 Suborder Leptodesmidea Brölemann, 1916
                       Superfamily Chelodesmoidea Cook, 1895
                          Family Chelodesmidae Cook, 1895
                       Superfamily Platyrhacoidea Pocock, 1895
                          Family Aphelidesmidae Brölemann, 1916
                          Family Platyrhacidae Pocock, 1895
                       Superfamily Rhachodesmoidea Carl, 1903
                          Family Rhachodesmidae Carl, 1903
                          Family Tridontomidae Loomis & Hoffman, 1962
                       Superfamily Sphaeriodesmoidea Humbert & DeSaussure, 1869
                          Family Campodesmidae Cook, 1896
                          Family Holistophallidae Silvestri, 1909
                          Family Sphaeriodesmidae Humbert & DeSaussure, 1869
                       Superfamily Xystodesmoidea Cook, 1895
                          Family Eurymerodesmidae Causey, 1951* E
                          Family Euryuridae Pocock, 1909* E
                          Family Gomphodesmidae Cook, 1896
                          Family Oxydesmidae Cook, 1895
                          Family Xystodesmidae Cook, 1895*
                 Suborder Dalodesmidea Hoffman, 1980
                          Family Dalodesmidae Cook, 1896
                          Family Vaalogonopodidae Verhoeff, 1940
                 Suborder Strongylosomatidea Brölemann, 1916
                          Family Paradoxosomatidae Daday, 1889* Int.
                 Suborder Polydesmidea Pocock, 1887
                    Infraorder Oniscodesmoides Simonsen, 1990
                       Superfamily Oniscodesmoidea DeSaussure, 1860
                          Family Dorsoporidae Loomis, 1958
                          Family Oniscodesmidae DeSaussure, 1860
                       Superfamily Pyrgodesmoidea Silvestri, 1896
                          Family Ammodesmidae Cook, 1896
                          Family Cyrtodesmidae Cook, 1896
                          Family Pyrgodesmidae Silvestri, 1896* N, I
                    Infraorder Polydesmoides Pocock, 1887
                       Superfamily Haplodesmoidea Cook, 1895
                          Family Doratodesmidae Cook, 1896
                          Family Haplodesmidae Cook, 1895* Int.
                       Superfamily Opisotretoidea Hoffman, 1980
                          Family Opisotretidae Hoffman, 1980
                       Superfamily Polydesmoidea Leach, 1815
                          Family Cryptodesmidae Karsch, 1880
                          Family Polydesmidae Leach, 1815* N, I
                       Superfamily Trichopolydesmoidea Verhoeff, 1910
                          Family Fuhrmannodesmidae Brölemann, 1916
                          Family Macrosternodesmidae Brölemann, 1916* N, I
                          Family Nearctodesmidae Chamberlin & Hoffman, 1950*
                          Family Trichopolydesmidae Verhoeff, 1910
 
   Helminthomorpha incertae sedis
              Order Siphoniulida Cook, 1895
                          Family Siphoniulidae Pocock, 1894

Shelley, R. M. 2003 (2002). A revised, annotated, family-level classification of the Diplopoda.
            Arthropoda Selecta, 11(3):187-207.


download list of families (4.3KB .txt file)