North Dvina Quarry (Permian of Russian Federation)

Also known as Sokolki, near Kotlas

Where: Archangel'sk, Russian Federation (61.3° N, 46.7° E: paleocoordinates 34.2° N, 36.0° E)

• coordinate based on nearby landmark

When: Vyatkian (259.0 - 252.3 Ma)

• "Upper Tatarian" according to Schoch & Milner 2014

Environment/lithology: terrestrial; poorly lithified sandstone and lithified, concretionary sandstone

• fossils "found in the 'lenses' which present cross-sections...cut in the marlstones, fille up with sand, and covered with marlstone again. The sand is but feebly cemented and yields mostly to a digging shovel; it contains numerous concretions of very hard sandstone, cemented with calcite from the size of a walnut to some three or four metres. Most of the vertebrate remains are buried in these concretions...only few remains of vertebrates are buried in sand itself...the matrix is very hard, defying the application of burrs, and sticks often to the bones very firmly."

Size class: macrofossils

Preservation: soft parts

Collected by Amalitzki in the 1910s

Collection methods: quarrying, mechanical,

Primary reference: P. P. Sushkin. 1936. Notes on the pre-Jurassic tetrapods from USSR. III. Dvinosaurus amalitzki, a perennibranchiate stegocephalian from the Upper Permian of North Dvina. Akademiya Nauk SSSR, Trudy Paleozoologicheskogo Instituta 5:43-91 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37202: authorized by Matthew Carrano, entered by Matthew Carrano on 04.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Temnospondyli - Dvinosauridae
"Dvinosaurus primus" = Dvinosaurus primus, "Dvinosaurus tertius" = Dvinosaurus primus, "Dvinosaurus secundus" = Dvinosaurus primus
"Dvinosaurus primus" = Dvinosaurus primus Amalitzki 1921 tetrapod
"Dvinosaurus tertius" = Dvinosaurus primus Amalitzki 1921 tetrapod
"Dvinosaurus secundus" = Dvinosaurus primus Amalitzki 1921 tetrapod