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program and abstracts volume (Journal of Vertebrate Paleontology, Volume 19, Supplement to Number 3).

Workshops in Ukhta and Syktyvkar, & field meeting in Subpolar Urals (Kozhym R. Basin) In July 2000, the final meeting of the IGCP Project 406 - Circum-Arctic Palaeozoic Vertebrates, or CAPV 2000 - will take place in Syktyvkar, Komi Republic, Russia. The meeting will be organized by the Institute of Geology of the Komi Science Centre, Ural Division of Russian Academy of Sciences, Syktyvkar, and by the Timan-Pechora Scientific Research Centre, Ukhta. The meeting will include two geological excursions - one (pre-conference) to Timan (Upper Devonian) and the other (post-conference) to Ordovician-Permian sections in the Subpolar Urals (Kozhym River). To prepare this meeting, workshops in Ukhta and Syktyvkar, and a field meeting in the Subpolar Urals (Kozhym River basin) took place in summer 1999.
Because of the importance of the final meeting of IGCP 406 in Syktyvkar, where participants will be presented with many opportunities for studying sections, collecting samples, and sharing ideas about some difficult outstanding problems of circum-Arctic correlation, a detailed report of the planning workshops held in 1999 is presented below. This section of the report was prepared mainly by co-leader P. Männik. Workshop in Ukhta
Time:July 5-11, 1999.
Participants:
S. V. Melnikov, Timan-Pechora Scientific Research Centre (Ukhta, Russia);
V. A. Zhemchugova, Timan-Pechora Scientific Research Centre (Ukhta, Russia);
P. Männik, Institute of Geology at Tallinn Technical University (Tallinn, Estonia).
Main problems discussed:
1. evolution of Silurian conodont faunas in the Timan-Urals region, and comparison of these faunas with those
from other regions;
2. Silurian stratigraphy in the Timan-Urals region, and correlations of this sequence with "international standard"; 3. preparation of core-sections from the Timan-Urals region to be demonstrated during the post-conference
excursion of CAPV-2000;
4. preparation of a paper by Melnikov and Zhemchugova for the Timan-Urals volume of the Proceedings of
Estonian Academy of Sciences (to be published in 2000, as issue No. 2).
Main results:
1. During five days, collections of Silurian conodons from several sections from the Timan-Pechora region were studied. Conclusions are:
- the fauna (particularly that of Telychian and younger strata) is dominated by endemic taxa;
- the Llandovery fauna is closest to that from Severnaya Zemlya;
- the Aeronian fauna seems to be most cosmopolitan, containing many taxa known also from other regions
of the world;
- although Pterospathodushas not been found in this region, several taxa (i.e. Apsidognathusetc.) allow
recognition of the Telychian interval;
- higher in the sequence, the fauna is dominated by representatives of Ctenognathodus, Oulodus?, and
probably some new, undescribed forms; the only level that can be correlated with other regions is
one containing Polygnathoides siluricus.
The specific composition of the faunas is evidently caused by the character of the basin - wide (n x 100 km) shallow-water shelf, at times almost completely isolated from the Uralian Ocean by reefs developing along the shelf margin.
2. Important problems concern the position of the Llandovery-Wenlock boundary in the sequence. Traditionally, this boundary has been thought to correspond to the contact between the Filipp''el' and Marshrutnyj stages. However, this does not agree with the conodont and sedimentological data. Conodonts characteristic of the Telychian appear in the lowermost part of the Marshrutnyj Stage and disappear in the middle (or even upper) part of the overlying Ust'Durnayu Stage. Based on the distribution of Apsidognathus(becomes extinct at or very close