Chopko River, bed Ch-11-I-4 (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: Agnostotes clavatus-Irvingella perfecta trilobite zone, 4 Member (Chopko Formation), Taoyuanian (495.2 - 486.9 Ma)

• sample Ch-11-I-4 of unit Ch-11, Cambrian stage 9

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified breccia

• breccia-conglomerate

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):1-56 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132508: authorized by Wolfgang Kiessling, entered by Uta Merkel on 20.08.2012

Creative Commons license: CC0 (CC0)

Taxonomic list

unclassified
  -
Trilobita
 Olenida - Pterocephaliidae
Pterocephaliidae indet. Kobayashi 1935 trilobite
  - Llanoaspididae
Tagenarella eniseica Lazarenko 1968 trilobite
 Lichida - Lichakephalidae
Eoacidaspis amplicauda Lazarenko 1968 trilobite
 Corynexochida - Illaenuridae
Yurakia sp. Rozova 1963 trilobite
 Ptychopariida - Catillicephalidae
Onchonotellus abnormis Ivshin 1956 trilobite
 Ptychopariida - Elviniidae
Irvingella perfecta Chernysheva 1968 trilobite
 Asaphida - Ceratopygidae
Proceratopyge tenuita Lazarenko 1966 trilobite
Artiopoda
 Agnostida - Diplagnostidae
Pseudagnostus intermedius, Pseudagnostus vastulus, "Agnostotes (Pseudoglyptagnostus) clavatus" = Agnostotes orientalis
Pseudagnostus vastulus Whitehouse 1936
"Agnostotes (Pseudoglyptagnostus) clavatus" = Agnostotes orientalis Kobayashi 1935