Anabar river, section 8, bed 18 (Cretaceous of Russian Federation)

Where: Russian Federation (72.6° N, 113.1° E: paleocoordinates 74.9° N, 92.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by Bogomolov in 1980

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 189615: authorized by Matthew Clapham, entered by Matthew Clapham on 03.11.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Polyptychitidae
"Euryptychites (Euryptychites) astieriptychus" = Polyptychites (Astieriptychites) astieriptychus, Tollia (Neotollia) klimovskiensis, "Euryptychites (Propolyptychites) cf. quadrifidus" = Virgatoptychites (Propolyptychites) quadrifidus
"Euryptychites (Euryptychites) astieriptychus" = Polyptychites (Astieriptychites) astieriptychus Voronetz 1958 ammonite
"Euryptychites (Propolyptychites) cf. quadrifidus" = Virgatoptychites (Propolyptychites) quadrifidus Koenen 1902 ammonite