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== Bibliographie ==
* {{en}} Maletz J (2014): The classification of the Pterobranchia (Cephalodiscida and Graptolithina), Bulletin of Geosciences, volume 89, 3 [as Callograptus Hall, 1865]
* {{en}} Kraft J. (1975): Dendroid Graptolites of the Ordovician of Bohemia, Acta Mus. Nat. Prague, 31, 3 - 5 [as Callograptus Hall, 1865]
* {{en}} Kraft P., Kraft J. (2004): New Dendroid Graptolites from the Klabava Fromation of the Bohemian Lower Ordovician, Journal of Czech Geological Society, 49/3-4 [as Callograptus Hall, 1865]
* {{en}} Kraft J., Kraft P., Seidl R. (1993): New dendroid graptolites from the Lower Ordovician of Bohemia, Journal of the Czech Geological Society 38/1-2, 89-94 [as Callograptus Hall, 1865]
* {{en}} Kraft J. (1998): Two new dendroid graptolites from the Klabava formation, Journal of the Czech Geological Society 43/4, 281-285 [as Callograptus Hall, 1865]
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