Frasnian conodonts from the eastern Russian Platform
作者： N. S. Ovnatanova , L. I. Kononova
DOI: 10.1134/S0031030108100018
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摘要: The Frasnian conodonts of the eastern Russian Platform from Timan in north to Orenburg Region south are characterized detail both paleontologically and stratigraphically. This paper is a continuation previously published monograph (Ovnatanova Kononova, 2001) on shallow-water strata central Platform, where polygnathids prevail. conodont assemblages basinal sections Volga-Ural province Southern analyzed. Problems difficulties associated with correlation deep-water their existing zonal scales discussed. between Mendym deposits Rechitza Voronezh Vetlasyan Sirachoi substantiated. stratotype Semiluki Regional Stage Central Devonian Field contains equivalents lowermost beds Domanik Formation (unit 1), based entirely polygnathids. Phylogenetic reconstructions for Palmatolepis Polygnathus suggested ontogenetic series some species these two genera presence transitional forms species. Based phylogenetic reconstructions, proposed also adduced. Some aspects biofacies control considered distribution studied. In Systematic Paleontology, 91 Ancyrodella, Mesotaxis, Palmatolepis, described, including new menneri, P. kaledai, acutangularis, reitlingerae.
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