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.
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