Tagasi otsingusse
Fedorov & Koromyslova, 2019
New findings of the genus Revalotrypa, the oldest bryozoan genus of Baltoscandia, in north-western Russia
Fedorov, P. V., Koromyslova, A. V.
DOI | 10.4267/2042/70296 |
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Aasta | 2019 |
Ajakiri | Carnets de Géologie |
Köide | 19 |
Number | 19 |
Leheküljed | 199-209 |
Tüüp | artikkel ajakirjas |
Id | 10521 |
Abstrakt
New findings of esthonioporate bryozoans of the species Revalotrypa cf. inopinata, representing one of the oldest bryozoans of Baltoscandia, are described from an outcrop located in Leningrad Oblast' (north-western Russia). The colonies of this species are very small and were extracted from limestone-cemented nodules found in glauconitic sandstones of the lower part of the Joa Member (Paroistodus proteus conodont zone, lowermost Floian, Lower Ordovician). Combined X-ray microtomography and the examination of traditional thin sections under a stereomicroscope and a light microscope were used to study the morphology of this species.
Viimati muudetud: 30.9.2021