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Ordovician Pogonophora from Poland
Pogonophores (Pogonophora) are a relatively poorly known group of marine worm-like
invertebrates, related to annelids (Annelida). Their living tubes are the elements with the
greatest chances of preservation in the fossil state. Biochemical studies on Recent
pogonophores showed that a chitin-protein complex is the basic structural component of
these tubes.

     The morphology of tubes is of importance for the taxonomy of Pogonophora. Features
such as length, diameter and ornamentation of the tubes and their differentiation into
sections are helpful in identification of species and genera, whereas they appear
insufficient as criteria for families and orders. Therefore, I consider that all the fossil
pogonophores should be treated as forms of
incertae ordinis et familiae. In working on
fossil pogonophores one should bear  in mind possibility of essential differences between
individual section of a given tube. The situation is addtionally complicated by the fact that
all the fossil tubes hitherto described are known only on the basis of fragments. The case
of the Recent Pogonophora is not dissimilar because the material coming from seas is
usually crushed.
Beklemishevites Mierzejewski, 1986
Ivanovites Koz?owski, 1967
Sokolovisyrinx Mierzejewski & Kulicki, 2003
Koz?owski, R. 1967. Sur certains fossiles ordoviciens a test organique.- Acta Palaeontologia Polonica 12, 2, 99-132.
Mierzejewski, P. 1986. Ultrastructure, taxonomy and affinities of some Ordovician and Silurian organic microfossils. -
Palaeontologia Polonica 47, 129-220.

Edited by
Piotr Mierzejewski, the Count of Calmont and Countess Maja Anna Korwin-Kossakowska
List of pogonophores known from the Ordovician of Poland:
     Toothed bristles of Pogonophora were not hitherto described in the fossil state and
this may represent an example of selective fossilization. It is worthy of note that an
enigmatic microfossil decribed as a probable gastropod radula from the Cretaceous of
France by Taugourdeau (1976) resembles closely the bristles of Pogonophora.