Dissertation for the degree of Doctor of Geological Sciences, specialty 04.00.09 - paleontology and stratigraphy. - Institute of Geological Sciences, National Academy of Sciences of Ukraine. - Kiev, 2014. The thesis reports upon the conodont faunas of the Upper Mississippian and Lower and Middle Pennsylvanian of different areas of Eurasia. Most attention is paid to the Serpukhovian, Bashkirian and Moscovian conodonts of the Donets Basin, Ukraine. The characteristic the abuntant Early Visean conodonts of the Saura Valley, (Algeria), Visean and Serpukhovian conodonts from the Triollo section (Spain) and Ober Rohre section (Germany), Serpukhovian and Bashkirian conodonts of La Lastra section (Spain) and Aksu section (Tien Shan, Uzbekistan), the Visean through the Bashkirian of the Naqing section (South China)as well as the Bashkirian of Urals (Russia) was given. The study focuses on the pattern of distribution and evolution of the Carboniferous conodonts in the Donets Basin and other sections of different facies as well as the use of their correlative potential to refine the boundaries and scope of the main stratigraphic units of the Global Carboniferous Stratigraphic Scale. The Serpukhovian, Bashkirian and Moscovian regional conodont zonal schemes were constructed for the Donets Basin, and Visean, Serpukhovian and Bashkirian regional conodont zonations were worked out for the studied sections of Europe and Asia. These zonations represent significant contribution to the development and refinement of the International Chronostratigraphic Carboniferous Scale. Studies have confirmed that the definition of the conodont zonal boundaries on the basis of the first appearance of the index-species in a single evolutionary lineage is the most reliable for the determination of the isochronous levels for the interregional and intercontinental correlations. Several lineages were established for the studied interval of the Carboniferous of Eurasia. In the Visean two lineages within Lochriea genus were studied. One was studied on the basis of the conodonts from Sahara? Which ncludes the earliest species of Lochriea: Lochriea saharae - L. commutata - L. mononodosa. Another lineage was recognised in many Eurasian section, it includes: Lochriea mononodosa - L. nodosa - L. ziegleri. In the Bashkirian -early Moscovian the lineage includes Declinognathodus praenoduliferus - D. noduliferus - D. marginodosus - D. donetzianus. And another lineage - Idiognathoides sulcatus - Id. postsulcatus. There were identified and proposed the members of the abovementioned lineages as markers to establish GSSPs close to the Visean/Serpukhovian and Bashkirian/ Moscovian boundaries. Lochriea ziegleri was proposed as index-species for the lower boundary of the Sepukhovian Stage and Declinognathodus donetzianus - for the lower boundary of the Moscovian. Attention is paid to the boundary between the Mississippian and Pennsylvanian subsystems in sections of different facies. The patterns of radiation of the conodont faunas after the extinction event were different. They were analysed on the basis of the study in detail the distribution of conodonts in the shallow water sections, such as the Donets Basin, sections in Germany Great Britain and North Anerica (Arrow Canyon), and deep water sections of Tien-Shan, Uzbekistan) and Cantabrian Mountains (Spain). was analysed. These studies of the Mid-Carboniferous extinction event in the sections of different facies helped to understand the process of the extinction event. Keywords: conodonts, biostratigraphy, carbon, zonation, lineage, extinction event, correlation.
