Acta Palaeontologica Polonica

Calyxdendrum graptoloides n. gen., n. sp. - a graptolite intermediate between the Dendroidea and the Graptoloidea

Roman Kozłowski

Acta Palaeontologica Polonica 05 (2), 1960: 107-125

Specimens of the graptolite here described under the name of Calyxdendrum graptoloides n. gen., n. sp. have been etched from erratic boulders of Middle Ordovician age. This form unites certain characters of the two orders:  Dendroidea and Graptoloidea. As in the Dendroidea the rhabdosome here consists of 3 categories of thecae, with triad budding, while the sicula is the same as in the Graptoloidea, i.e. conical and provided with a nema.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (for details please see, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.