Popigay River, section 23, bed 3 (Cretaceous of Russian Federation)

Where: Russian Federation (72.8° N, 108.0° E: paleocoordinates 74.3° N, 87.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bidichotomus ammonoid zone, Late/Upper Valanginian (140.2 - 136.4 Ma)

• Bidichotomoides 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 189644: authorized by Matthew Clapham, entered by Matthew Clapham on 04.11.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Buchiidae
 Mytilida - Crenellidae
 Pholadida - Pleuromyidae
Pleuromya sp. Agassiz 1845 clam
 Cardiida - Arcticidae
Arctica sp. Schumacher 1817 clam
 Cardiida - Tancrediidae
Tancredia sp. Lycett 1850 clam
 Cardiida - Cardiidae
 Pholadomyida - Pholadomyidae
Gastropoda
 Heterostropha - Bullinidae
Cephalopoda
 Ammonitida - Polyptychitidae
"Polyptychites (Dichotomites) bidichotomus" = Dichotomites (Dichotomites) bidichotomus d'Orbigny 1841 ammonite