Artinskian

System/
Period		 Series/
Epoch		 Stage/
Age		 Age (Ma)
Triassic Lower/
Early		 Induan younger
Permian Lopingian Changhsingian 251.902 254.14
Wuchiapingian 254.14 259.1
Guadalupian Capitanian 259.1 265.1
Wordian 265.1 268.8
Roadian 268.8 272.95
Cisuralian Kungurian 272.95 283.5
Artinskian 283.5 290.1
Sakmarian 290.1 295.0
Asselian 295.0 298.9
Carboniferous Pennsylvanian Gzhelian older
Subdivision of the Permian system
according to the ICS, as of 2017.[1]

In the geologic timescale, the Artinskian is an age or stage of the Permian. It is a subdivision of the Cisuralian epoch or series. The Artinskian lasted between 290.1 and 283.5 million years ago (Ma). It was preceded by the Sakmarian and followed by the Kungurian.[2]

Stratigraphy

Jimbacrinus bostocki Artinskian of Australia. (Found near Jimba Jimba Station )

The Artinskian is named after the small Russian city of Arti (formerly Artinsk), situated in the southern Ural mountains, about 200 km southwest of Yekaterinburg. The stage was introduced into scientific literature by Alexander Karpinsky in 1874.

The base of the Artinskian stage is defined as the place in the stratigraphic record where fossils of conodont species Sweetognathus whitei and Mesogondolella bisselli first appear. As of 2009, there was no agreement yet on a global reference profile (a GSSP) for the base of the Artinskian. The top of the Artinskian (the base of the Kungurian) is defined as the place in the stratigraphic record where fossils of conodonts Neostreptognathodus pnevi and Neostreptognathodus exculptus first appear.

Palaeontology

Amphibians

Amphibians of the Artinskian
Taxa Presence Location Description Images
North America
Boskovice Furrow, Czech Republic
Abo Formation, New Mexico and Seymour, Baylor County, Texas

Arthropods

Arthropods of the Artinskian
Taxa Presence Location Description Images
Kansas and Oklahoma

Synapsids

Synapsids of the Artinskian
Taxa Presence Location Description Images

Sakmarian-Kungurian

Greene Formation, Ohio; Belle Plains Formation, Texas; Cutler Formation, Utah, all in the USA
Kasimovian-Kungurian

Kenilworth, Kenilworth Sandstone Formation, Warwickshire Group, Warwickshire, England; Autun, France, Cutler Formation, Arizona, Colorado, New Mexico and Utah; Fort riley, Chase Group, Kansas, Greene Formation, Dunkard Group, Ohio; Wellington Formation, Oklahoma; Clyde Formation, Texas and Oklahoma; Admiral Formation; Belle-Plains Formation; Wichita Group, all three in Texas,

Wichita Group and Clear Fork Group, both in Texas, USA
Gzhelian-Artinskian New Mexico; Utah-Arizona border region, both in USA; possibly England The English specimen known as S?. brittanicus ) is now generally classified as Sphenacodontidae incertae sedis separate from the other Sphenacodon species so may need reassigning.

References

  1. ↑ http://www.stratigraphy.org/index.php/ics-chart-timescale
  2. ↑ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
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