Chopko River, bed Ch-22a-6 (Cambrian of Russian Federation)

Where: Krasnoyar, Russian Federation (68.9° N, 88.7° E)

• Paleocoordinates: 6.3° S, 35.4° W (Wright 2013)

• coordinate estimated from map

• small collection-level geographic resolution

When: Irvingella norilica trilobite zone, 5 Member (Chopko Formation), Taoyuanian (495.2 - 486.9 Ma)

• Cambrian stage 9

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified limestone and lithified marl

• shallow-water environments (wide distribution of worms, oolitic and algal rocks in pebbles of breccia-conglomerate, and dolomitization)
• breccia-conglomerate bed in blocks of gray and brownish gray detrital and clastic limestone (bioclastic wackestones and packstones)

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: A. I. Varlamov, K. L. Pak, and A. V. Rosova. 2006. The Upper Cambrian of the Chopko River section, Norilsk region, northwestern Siberian Platform: stratigraphy and trilobites. Paleontological Journal 40(Suppl. 1):S1–S56 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132547: authorized by Wolfgang Kiessling, entered by Uta Merkel on 21.08.2012

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Convexocephalus granularis, Tchopkina tchopkinica
Artiopoda
  - Llanoaspididae
Tagenarella eniseica
Tagenarella eniseica Lazarenko 1968 trilobite
 Ptychopariida - Acrocephalitidae
Acrocephalites militans
Acrocephalites militans Lermontova 1940 trilobite
 Ptychopariida - Elviniidae
Irvingella norilica
Irvingella norilica Lazarenko 1968 trilobite
 Agnostida - Diplagnostidae
Pseudagnostus cryptus
 Agnostida - Pseudagnostidae
Norilagnostus quadratus
Norilagnostus quadratus Lazarenko 1966 artiopod