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Published December 31, 2002 | Version v1
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Conodonts in the Silurian of Severnaya Zemlya and Sedov archipelagos (Russia), with special reference to the genus Ozarkodina Branson & Mehl, 1933

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  • 1. Institute of Geology, Tallinn Technical University, Estonia Ave 7, 10143 Tallinn (Estonia) mannik@gi.ee The studied conodont faunas indicate that the main part of the Silurian sequence on Severnaya Zemlya and Sedov archipelagos (Vodopad, Golomyannyj, Srednij formations and the lower part of the Samojlovich Formation) is of Llandovery age. Llandovery ozarkodinids are dominated by Ozarkodina waugoolaensis Bischoff, 1986; Oz. aldridgei Uyeno & Barnes, 1983 occurs at some levels; Oz. guiyangensis Zhou, Zhai & Xian, 1981 and Ozarkodina sp. E characterize the Golomyannyj Formation. From the Wenlock strata only Oz. confluens bucerus (Viira, 1983) has been found. Oz. polinclinata Nicoll & Rexroad, 1968 is very rare, and Oz. excavata (Branson & Mehl, 1933) is evidently missing in this region. Several poorly represented new species of Ozarkodina Branson & Mehl, 1933 are kept in open nomenclature. Étude des conodontes des niveaux stratigraphiques siluriens des archipels de Severnaya Zemlya et de Sedov (Russie), et en particulier du genre Ozarkodina Branson & Mehl, 1933. Dans les niveaux siluriens des archipels de Severnaya Zemlya et de Sedov (formations de Vodopad, de Golomyannyj, de Srednij et la partie inférieure de la Formation Samojlovich), les faunes de conodontes indiquent que la majeure partie de ces niveaux sont d'âge Llandovery. Les ozarkodinides de cet âge sont représentés majoritairement par Ozarkodina waugoolaensis Bischoff, 1986. Dans certains niveaux, on trouve Oz. aldridgei Uyeno & Barnes, 1983; alors que la Formation Golomyannyj est caractérisée par la présence de Oz. guiyangensis Zhou, Zhai & Xian, 1981 et Ozarkodina sp. E. C'est dans les niveaux du Wenlock que domine Oz. confluens bucerus (Viira, 1983). D'autres taxons sont rares, c'est le cas de Oz. polinclinata Nicoll & Rexroad, 1968, d'autres sont absents du niveau silurien de ces archipels, c'est le cas de Oz. excavata (Branson & Mehl, 1933). Une nomenclature ouverte a été appliquée à quelques espèces mal représentées du genre Ozarkodina Branson & Mehl, 1933.

Description

Männik, Peep (2002): Conodonts in the Silurian of Severnaya Zemlya and Sedov archipelagos (Russia), with special reference to the genus Ozarkodina Branson & Mehl, 1933. Geodiversitas 24 (1): 77-97, DOI: 10.5281/zenodo.5375145

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urn:lsid:plazi.org:pub:FFB06B6BFFC0FFD2EE16FF809305FFA0

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Figure: 10.5281/zenodo.5375147 (DOI)
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Figure: 10.5281/zenodo.5375167 (DOI)

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