D i a g no s i s:
Dendroid graptolite, with rhabdosome consisting of straight stipes without the anastomoses. Bithecae situated on one side of the stipes, less frequently, alternately on both sides. Autothecae sessile, without the ventral and dorsal denticle. metasicula without zigzag lines. Pore in the wall of the metasicula.
N a m e d e r i v a t i o n:
A genus displaying a certain combination of characters of Dendroidea and Graptoloidea. The specific name indicates the instability of different characters.
This graptolite is one of the most common representatives of the Dendroidea, met with in the Ordovician erratic boulders of Poland.
Source: R. Kozlowski (1966)
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