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Wyszukujesz frazę "Zhuravlev, A.Y." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Comment on “An enigmatic, possibly chemosymbiotic, hexactinellid sponge from the early Cambrian of South China” by Joseph P. Botting, Lucy A. Muir, Xiang-Feng Li, and Jin-Pai Lin
Autorzy:
Zhuravlev, A.Y.
Vintaned, J.A.G.
Tabachnick, K.R.
Powiązania:
https://bibliotekanauki.pl/articles/945820.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 2; 475-476
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A probable oligochaete from an Early Triassic Lagerstatte of the southern Cis-Urals and its evolutionary implications
Autorzy:
Shcherbakov, D.E.
Timm, T.
Tzetlin, A.B.
Vinn, O.
Zhuravlev, A.Y.
Powiązania:
https://bibliotekanauki.pl/articles/2082181.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Annelida
Clitellata
Oligochaeta
Mesozoic
Lagerstätte
Russia
Opis:
Oligochaetes, despite their important role in terrestrial ecosystems and a tremendous biomass, are extremely rare fossils. The palaeontological record of these worms is restricted to some cocoons, presumable trace fossils and a few body fossils the most convincing of which are discovered in Mesozoic and Cenozoic strata. The Olenekian (Lower Triassic) siliciclastic lacustrine Petropavlovka Lagerstätte of the southern Cis-Urals yields a number of extraordinary freshwater fossils including an annelid. The segmented body with a secondary annulation of this fossil, a subtriangular prostomium, a relatively thick layered body wall and, possibly, the presence of a genital region point to its oligochaete affinities. Other fossil worms which have been ascribed to clitellates are reviewed and, with a tentative exception of two Pennsylvanian finds, affinities of any pre-Mesozoic forms to clitellate annelids are rejected. The new fossil worm allows tracing of a persuasive oligochaete record to the lowermost Mesozoic and confirms a plausibility of the origin of this annelid group in freshwater conditions.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 2; 219-233
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New finds of skeletal fossils in the terminal Neoproterozoic of the Siberian Platform and Spain
Autorzy:
Zhuravlev, A.Y.
Linan, E.
Gamez Vintaned, J.A.
Debrenne, F.
Fedorov, A.B.
Powiązania:
https://bibliotekanauki.pl/articles/22120.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
skeletal fossil
Neoproterozoic
Siberian Platform
Spain
Cloudina
Ediacaran skeletal fossil
microstructure
extinction
Opis:
A current paradigm accepts the presence of weakly biomineralized animals only, barely above a low metazoan grade of organization in the terminal Neoproterozoic (Ediacaran), and a later, early Cambrian burst of well skeletonized animals. Here we report new assemblages of primarily calcareous shelly fossils from upper Ediacaran (553–542 Ma) carbonates of Spain and Russia (Siberian Platform). The problematic organism Cloudina is found in the Yudoma Group of the southeastern Siberian Platform and different skeletal taxa have been discovered in the terminal Neoproterozoic of several provinces of Spain. New data on the morphology and microstructure of Ediacaran skeletal fossils Cloudina and Namacalathus indicate that the Neoproterozoic skeletal organisms were already reasonably advanced. In total, at least 15 skeletal metazoan genera are recorded worldwide within this interval. This number is comparable with that known for the basal early Cambrian. These data reveal that the terminal Neoproterozoic skeletal bloom was a real precursor of the Cambrian radiation. Cloudina, the oldest animal with a mineralised skeleton on the Siberian Platform, characterises the uppermost Ediacaran strata of the Ust’−Yudoma Formation. While in Siberia Cloudina co−occurs with small skeletal fossils of Cambrian aspect, in Spain Cloudina−bearing carbonates and other Ediacaran skeletal fossils alternate with strata containing rich terminal Neoproterozoic trace fossil assemblages. These finds treated together provide a possibility to correlate transitional Neoproterozoic– lower Cambrian strata around the world. Such a correlation concurs with available isotope and radiometric data and indicates that typical Ediacaran shelly fossils have not crossed the Precambrian–Cambrian boundary.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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