Bol’shaya Kuonamka River 8/32 (Cambrian of Russian Federation)

Also known as Section 8

Where: Siberia, Russian Federation (70.7° N, 113.0° E: paleocoordinates 17.0° S, 6.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tomagnostus fissus - Paradoxides sacheri trilobite zone, 7 Member (Kuonamka Formation), Solvan (510.2 - 504.5 Ma)

• Amgan stage of Siberian scale. Tomagnostus fissus / Paradoxides sacheri zone; "correlated with lower Drumian Stage of IUGS"

• bed-level stratigraphic resolution

Environment/lithology: lime mudstone

• "The fossils are derived from limestone beds in the bituminous Kuonamka Formation; "Grey and brown bituminous lime mudstones with minor bituminous black shale and rare layers of black chert. Thick- ness: 11.8 m."

Size classes: macrofossils, microfossils

Preservation: replaced with silica

Collected by A. Kouchinsky, S. Bengtson in 1996

• Swedish Museum of Natural History

Primary reference: A. P. Gubanov, A.V. Kouchinsky, J.S. Peel and S. Bengston. 2004. Middle Cambrian molluscs of ‘Australian’ aspect from northern Siberia. Alcheringa 28(1):1-20 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49431: authorized by Pete Wagner, entered by Pete Wagner on 15.04.2005, edited by Hallie Street

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Microdictyon
  -
Microdictyon sp. Bengston et al. 1981
unclassified
  -
Mollusca indet. Linnaeus 1758
Rostroconchia
 Tuarangiida - Pseudomyonidae
Pseudomyona queenslandica Runnegar and Jell 1976
Bivalvia
 Fordillida - Fordillidae
Pojetaia dentifera Kouchinsky et al. 2011 clam
Helcionelloida
 Helcionellida - Yochelcionellidae
Yochelcionella sp. Runnegar and Pojeta 1974
Yochelcionella angustiplicata Hinz-Schallreuter 1997
 Helcionellida - Pelagiellidae
Pelagiella spp. Matthew 1895
? Cambretina mareki Horný 1964
  - Helcionellidae
Anabaroconus sibiricus n. sp. Gubanov et al. 2004
type locality
Protowenella sp. Runnegar and Jell 1976
Kuonamkaella oliva n. sp. Gubanov et al. 2004
type locality
Hyolitha
  -
 Hyolithida -
Hyolithida indet. Mathew 1962
 Orthothecida -
Hexactinellida
  -
Hexactinellida indet. Schmidt 1870 glass sponge
 Lyssacinosa - Stiodermatidae
Thoracospongia cf. follispiculata Mehl 1996 glass sponge
Coeloscleritophora
 Chancelloriida -
Chancelloriida indet. Walcott 1920
 Chancelloriida - Chancelloriidae
Chancelloria cf. eros Walcott 1920