Dicellograptus forchammeri, from Ruedemann 1947.

Belongs within: Reclinata.

The Dicranograptidae are a group of graptoloids from the Upper Ordovician, characterised by a simple sicula with a dorsal sinus, and partial or complete monoseriality (Fortey & Cooper 1986).

Dicranograptidae [Dicellograpta]
    |--Ordosograptus FC86
    |--Leptograptus Lapworth 1873 FC86, B70
    |    |--*L. flaccidus (Hall 1865) [=Graptolithus flaccidus] B70
    |    |    |--L. f. flaccidus B70
    |    |    |--L. f. macilentus B70
    |    |    `--L. f. trentonensis B70
    |    `--L. capillaris F71
    |--Dicranograptus Hall 1865 [incl. Cladograpsus Emmons 1855 non Geinitz 1852, Diceratograptus Mu 1963] B70
    |    |--*D. ramosus (Hall 1848) B70 [=Graptolithus ramosus B70, G. (Climacograptus) ramosus W77]
    |    |--D. clingani B70
    |    |--*Cladograpsus’ dissimilis Emmons 1855 B70
    |    |--D. furcatus B70
    |    |    |--D. f. furcatus B70
    |    |    `--D. f. bispiralis B70
    |    |--D. hians [incl. D. hians var. apertus Hall 1909] F71
    |    |--*Diceratograptus’ mirus Mu 1963 B70
    |    |--D. nicholsoni B70
    |    |--D. pringlei B70
    |    |--D. rectus F71
    |    |--D. sextans [=Graptolithus sextans] W77
    |    `--D. ziczac [incl. D. ziczac var. minimus] F71
    `--Dicellograptus Hopkinson 1871 [=Dicellograpsus] B70
         |--*D. elegans (Carruthers 1868) B70 [=Didymograptus elegans B70; incl. D. affinis Hall 1902 F71]
         |--D. anceps B70
         |--D. angulatus F71
         |--D. caduceus F71
         |--D. clingani C68
         |--D. complanatus F71
         |    |--D. c. complanatus F71
         |    `--D. c. ornatus F71
         |--D. divaricatus [incl. D. divaricatus var. rigidis] F71
         |--D. forchammeri F71
         |--D. geniculatus B70
         |--D. moffatensis F71
         |--D. morrisi F71
         |--D. patulosus F71
         |--D. pumilus F71
         |--D. sextans F71
         |    |--D. s. sextans C68
         |    `--D. s. exilis C68
         `--D. smithi F71

*Type species of generic name indicated


[B70] Bulman, O. M. B. 1970. Graptolithina with sections of Enteropneusta and Pterobranchia. In Treatise on Invertebrate Paleontology Part V 2nd ed. (C. Teichert, ed.) pp. V1-V149. The Geological Society of America, Inc.: Boulder (Colorado), and the University of Kansas: Lawrence (Kansas).

[C68] Cooper, R. A. 1968. Lower and Middle Paleozoic fossil localities of north-west Nelson. Transactions of the Royal Society of New Zealand, Geology 6 (7): 75-89.

[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1-167.

[FC86] Fortey, R. A., & R. A. Cooper. 1986. A phylogenetic classification of the graptoloids. Palaeontology 29: 631-654.

[W77] White, C. A. 1877. Report upon the invertebrate fossils collected in portions of Nevada, Utah, Colorado, New Mexico, and Arizona, by parties of the expeditions of 1871, 1872, 1873, and 1874. U.S. Geographical Surveys West of the One Hundredth Meridian 4 (1): 1-219, pls 211-221.

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