Where: Russian Federation (74.0° N, 112.9° E: paleocoordinates 76.0° N, 89.7° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Quadrifidus 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 1981
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 189421: authorized by Matthew Clapham, entered by Matthew Clapham on 18.10.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
"Euryptychites (Propolyptychites) aff. quadrifidus" = Virgatoptychites (Propolyptychites) quadrifidus
"Euryptychites (Propolyptychites) aff. quadrifidus" = Virgatoptychites (Propolyptychites) quadrifidus Koenen 1902 ammonite |