Tchertovskii Fm., Zagor Stream (Ordovician of Russian Federation)

Where: Siberia, Russian Federation (68.0° N, 88.0° E: paleocoordinates 2.3° S, 16.0° E)

• local area-level geographic resolution

When: Lower Member (Zagornyi Formation), Early/Lower Llandeilo (466.0 - 460.9 Ma)

• PJW: Tchertovskii is Lower Zagornyi

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, calcareous sandstone and shale

• interbedded sandstone, shale and packstone

Size class: macrofossils

Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: B. S. Sokolov. 1982. Ordovician of the siberian Platform: Key section on the Kulumbe River. Academy of Sciences of the USSR, Siberian Branch, Transactions 506:1-239 [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 9301: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 12.10.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Bolbinella sp., Cyrtoniodus sp., Prionoidus sp.
Conodonta
  - Coleodontidae
Stereoconus sp.
Stereoconus sp. Branson and Mehl 1933 conodont
 Prioniodontida -
Oulodus sp., ? Chirognathus sp., "Microcoelodus sp." = Erismodus, "Ptiloconus sp." = Erismodus
Oulodus sp. Branson and Mehl 1933 conodont
"Microcoelodus sp." = Erismodus conodont
"Ptiloconus sp." = Erismodus conodont
 Prioniodontida - Polyplacognathidae
Polyplacognathus sp.
Polyplacognathus sp. Stauffer 1935 conodont
 Prioniodontida - Balognathidae
Amorphognathus sp.
Amorphognathus sp. Branson and Mehl 1933 conodont
 Prioniodontida -
Phragmodus sp.
Phragmodus sp. Branson and Mehl 1933 conodont
 Panderodontida - Panderodontidae
Panderodus sp.
Panderodus sp. Ethington 1959 conodont
 Ozarkodinida -
Periodon sp.
Periodon sp. Hadding 1913 conodont
  -
Trichonodella sp.
Trichonodella sp. Branson and Branson 1947 conodont
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
Rostricellula sp.
Rostricellula sp. Ulrich and Cooper 1942
Ostracoda
 Hollinocopida - Tvaerenellidae
Tvaerenella sp.
Tvaerenella sp. Jaanusson 1957 ostracod
 Hollinocopida - Tetradellidae
Sigmobolbina sp.
Sigmobolbina sp. Henningsmoen 1953 ostracod
 Hollinocopida - Egorovellidae
Egorovella sp., Bodenia sp.
Bodenia sp. ostracod
 Hollinocopida - Eurychilinidae
Coelochilina sp.
Coelochilina sp. Ulrich and Bassler 1923 ostracod
  - Sigmoopsidae
Oecematobolbina sp.
Trilobita
 Phacopida - Pterygometopidae
Isalaux sp.
Isalaux sp. Frederickson and Pollack 1952 trilobite