Dictyonema J. Hall, 1851

Rickards, R. B., Chapman, A. J., Wright, A. J. & Packham, G. H, 2003, Dendroid and Tuboid Graptolites from the Llandovery (Silurian) of the Four Mile Creek Area, New South Wales, Records of the Australian Museum 55 (3), pp. 305-330 : 314

Dictyonema J. Hall, 1851

Type species. Gorgonia retiformis J. Hall, 1843 ; subsequently designated by Miller (1889).

Remarks. As there is often considerable difficulty, in the absence of holdfasts or siculate origins, in assigning a benthic or planktic mode to dendroid graptolite specimens, here we follow the traditional, conservative approach, as did Rickards et al. (1994), in using Dictyonema in its traditional sense to include planktic forms.