Tigyan-Yuryakh River, section 1, bed 20 (Cretaceous of Russian Federation)

Where: Russian Federation (73.7° N, 111.0° E: paleocoordinates 75.5° N, 88.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ramulicosta ammonoid zone, Early/Lower Valanginian (140.2 - 136.4 Ma)

• Ramulicosta subzone

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by Bogomolov in 1984

Primary reference: Y. I. Bogomolov. 1989. Poliptikhity (Ammonity) i biostratigrafiya boreal'nogo Valanzhina. Akademiya Nauk SSSR, Sibirskoe Otdelenie Trudy Instituta Geologii I Geofiziki 696:1-199 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189596: authorized by Matthew Clapham, entered by Matthew Clapham on 03.11.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Bivalvia
 Myalinida - Inoceramidae
 Pectinida - Buchiidae
Cephalopoda
 Ammonitida - Polyptychitidae
"Euryptychites (Euryptychites) astieriptychus" = Polyptychites (Astieriptychites) astieriptychus, "Siberites ramulicosta" = Polyptychites (Polyptychites) ramulicosta, "Siberites cf. ascendens" = Polyptychites (Polyptychites) ascendens
"Euryptychites (Euryptychites) astieriptychus" = Polyptychites (Astieriptychites) astieriptychus Voronetz 1958 ammonite
"Siberites ramulicosta" = Polyptychites (Polyptychites) ramulicosta Pavlow 1892 ammonite
"Siberites cf. ascendens" = Polyptychites (Polyptychites) ascendens Koenen 1902 ammonite