After Bulman, 1955

<==o †Dichograptidae Lapworth, 1873
   |--o †“Multiramous forms”
   |  |--o †Goniograpti
   |  |  |--o †Goniograptus M'Coy, 1876; L.Ord. NA. NZ. Aust.
   |  |  |  `-- †G. thureaui [Didymograpsus thureaui]
   |  |  |--o †Anomalograptus Clark, 1924; L.Ord. ENA.
   |  |  |  `-- †A. religuus Clark, 1924
   |  |  |--o †Brachiograptus Harris & Keble, 1932; L.Ord. NA. SA.
   |  |  |  `-- †B. etaformis Harris & Keble, 1932
   |  |  |--o †Loganographus Hall, 1868; L.Ord. NWEu. NA. Aust.
   |  |  |  `-- †L. logani (Hall, 1858) [Graptolithus logani Hall, 1858]
   |  |  |--o †Pterograptus Holm, 1881; L.Ord. NWEu. SA. Aust.
   |  |  |  |-- †P. elegans Holm, 1881 [Graptolithus gracilis Kjerulf, 1865]
   |  |  |  `-- †P. scanicus Moberg
   |  |  |--o †Sigmagraptus Ruedemann, 1904; L.Ord. NA. Aust.
   |  |  |  `-- †S. praecursor Ruedemann, 1904
   |  |  |--o †Trichograptus Nicholson, 1876 L.Ord. NWEu. SA. Aust.
   |  |  |  `-- †T. fragilis (Nicholson, 1869) [Dichograptus fragilis Nicholson, 1869]
   |  |  `--o †Zygograptus Harris & Thomas, 1941; L.Ord. Aust. NA.
   |  |     `-- †Z. abnormis (Hall, 1857) [Graptolithus abnormis Hall, 1857]
   |  |--o †Temnograpti
   |  |  |--o †Temnograptus Nicholson, 1876; L.Ord. NWEu. NA.
   |  |  |  `-- †T. multiplex (Nicholson, 1868) [Dichograpsus multiplex Nicholson, 1868]
   |  |  `--o †Calamograptus Clark, 1924; L.Ord. ENA.
   |  |     `-- †C. porrectus Clark, 1924
   |  |--o †Schizograpti
   |  |  |?-o ?†Anthograptus Törnquist, 1904; L.Ord. NWEu.
   |  |  |  `-- †A. nidus Törnquist, 1904
   |  |  |--o †Schizoraptus Nicholson, 1876; L.Ord. NWEu. NA. ?SA. Aust.
   |  |  |  `-- †S. reticulatus (Nicholson, 1868) [Dichograpsus reticulatus Nicholson, 1868]
   |  |  |--o †Holograptus Holm, 1881 [Rouvilligraptus Barrois, 1893] L.Ord. NWEu. CEu.
   |  |  |  |-- †H. expansus Holm, 1881
   |  |  |  `-- †H. deani Elles & Wood
   |  |  |--o †Mimograptus Harris & Thomas, 1940; L.Ord. Aust.
   |  |  |  `-- †M. mutabilis Harris & Thomas, 1940
   |  |  `--o †Trochograptus Holm, 1881; L.Ord. NWEu. NA. Aust.
   |  |     `-- †T. diffusus Holm, 1881
   |  `--o †Dichograpti
   |     `--o †Dichograptus Salter, 1863 emend. Hall, 1865 [pro Dichograpsus Salter, 1863] L.Ord.
   |        |-- †D. sedgwicki S.D. Gurley, 1896
   |        `-- †D. octobrachiatus (Hall)
   `--o †“Pauciramous forms”
      |--o †Tetragrapti
      |  |--o †Tetragraptus Salter, 1863 emend. Hall, 1865 [pro Tetragrapsus Salter, 1863] [Etagraptus Ruedemann, 1904; Eotetragraptus Boucek & Pribyl, 1951; Pendeograptus Boucek & Pribyl, 1951] L.Ord.
      |  |  |-- †T. serra (Brongniart, 1828) [Fucoides serra Brongniart, 1828; Graptolithus bryonoides Hall, 1858]
      |  |  |-- †T. fruticosus (Hall)
      |  |  |-- †T. quadribrachiatus (Hall)
      |  |  |-- †T. approximatus Nicholson
      |  |  |-- †T. bigsbyi (Hall)
      |  |  `-- †T. phyllograptoides Linnarsson
      |  `--o †Phyllograptus Hall, 1858
      |     |-- †P. typus Hall, 1858
      |     `-- †P. angustifolius Hall
      `--o †Didymograpti
         |--o †Didymograptus M'Coy in Sedgwick & M'Coy, 1851 emend. Hall, 1865 [pro Didymograpsus M'Coy, 1851] [Cladograpsus Geinitz, 1852; Atopograptus Harris, 1926; Expansograptus Boucek & Pribyl, 1951; Holmograptus Kozlowski, 1954] L.-M.Ord.
         |  |-- †D. murchisoni (Beck, 1839) S.D. Miller, 1889 [Graptolithus murchisoni Beck, 1839]
         |  |-- †D. extensus (Hall)
         |  |-- †D. nicholsoni Lapworth
         |  `-- †D. callotheca Bulman
         |--o †Azygograptus Nicholson & Lapworth in Nicholson, 1875 [Nicholsonograptus Boucek & Pribyl, 1951] L.-M.Ord. Eu. EAs. NA. SA.
         |  |-- †A. lapworthi Nicholson & Lapworth in Nicholson, 1875
         |  `-- †A. suecicus Moberg
         |--o †Cardiograptus Harris & Keble, 1916; L.Ord. Aust. EAs.
         |  `-- †C. morsus Harris & Keble, 1916
         |--o †Dinemagraptus Kozlowski, 1952 L.Ord. EEu.
         |  `-- †D. warkae Kozlowski, 1952
         |--o †Isograptus Moberg, 1892; L.Ord. NWEu. NA. SA. Aust. As.
         |  `-- †I. gibberulus (Nicholson, 1875) [Didymograptus gibberulus Nicholson, 1875; =? Didymograptus caduceus Salter, 1853]
         |--o †Janograptus Tullberg, 1880; L.Ord. NWEu. SA.
         |  `-- †J. laxatus Tullberg, 1880
         |--o †Maeandrograptus Moberg, 1892; L.Ord. NWEu. Aust.
         |  `-- †M. schmalenseei Moberg, 1892
         |--o †Oncograptus T.S. Hall, 1914; L.Ord. Aust. NA.
         |  `-- †O. upsilon T.S. Hall. 1914
         |--o †Parazygograptus Kozlowski, 1954; L.Ord. EEu.
         |  `-- †P. erraticus Kozlowski, 1954
         `--o †Skiagraptus Harris, 1933; L.Ord. Aust.
            `-- †S. gnomonicus (Harris & Keble, 1916) [Diplograptus gnomonicus Harris & Keble, 1916]

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