FIRST OCCURRENCE OF FOOTPRINTS OF LARGE THERAPSIDS FROM THE UPPER PERMIAN OF EUROPEAN RUSSIA

Autor:	Richard J. Twitchett, Mikhail V. Surkov, Michael J. Benton, Valentin P. Tverdokhlebov, Andrew J. Newell
Rok vydání:	2007
Předmět:	Horizon (geology) geography geography.geographical_feature_category biology Floodplain Permian Paleontology Dicynodont Trace fossil biology.organism_classification Therapsid Ecology Evolution Behavior and Systematics Geology
Zdroj:	University of Bristol-PURE
ISSN:	1475-4983 0031-0239
DOI:	10.1111/j.1475-4983.2007.00647.x
Popis:	Large footprints of terrestrial tetrapods have been found in the Cis-Urals region of European Russia. The foot- print horizon is in Late Permian (Changhsingian) deposits of the Vyatkian Gorizont (uppermost Tatarian) approximately 50 m below the local Permian ⁄ Triassic boundary. Seventeen randomly orientated footprints were excavated and are referred to the ichnospecies Brontopus giganteus. The foot- prints were emplaced in a reddish-brown mudstone that was deposited from suspension beneath shallow ponded water in a floodplain environment. They were subsequently cast by the base of the overlying fine-grained sandstone, which was deposited from a sheet-flood event. The footprints were pro- duced by a large therapsid, possibly a dinocephalian, but more probably a dicynodont, and represent the first ichnological record of the Therapsida from the Upper Permian of Russia.
Databáze:	OpenAIRE
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