Western Siberia-2 (Cretaceous of Russian Federation)

Where: Russian Federation (62.5° N, 70.0° E: paleocoordinates 59.4° N, 65.2° E)

• local area-level geographic resolution

When: Surites analogus zone, Berriasian (145.0 - 139.8 Ma)

Environment/lithology: marine; siliciclastic sediments

Size class: macrofossils

Collection methods: Almost all over the West Siberian Plain, the Berriasian stage is overlain by a thick series of younger sediments, and thus, studies are done on cores of deep boreholes. Collections are grouped according to ammonite zones.

Primary reference: V. N. Saks, ed. 1975. The Jurassic-Cretaceous Boundary and the Berriasian Stage in the Boreal Realm. 1-319 [M. Patzkowsky/K. Layou/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 2507: authorized by Mark Patzkowsky, entered by Karen Layou on 07.07.1999, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Polyptychitidae
Surites sp. Sazonov 1951 ammonite
originally entered as "Surites sp."
? Subcraspedites subpressulus ammonite
originally entered as "Subcraspedites? subpressulus"
Bivalvia
 Pectinida - Buchiidae
Buchia volgensis Lahusen 1888 scallop
Buchia terebratuloides Lahusen 1888 scallop
Buchia okensis Pavlow 1907 scallop
Foraminifera
  -
Ammobaculoides sibiricus
originally entered as "Ammocbaculoides sibiricus"
 Lituolida - Lituolidae
 Lituolida - Haplophragmoididae
Cribrostomoides umbonatus
Cribrostomoides umbonatus umbonatus
 Lituolida - Ammobaculinidae
  -
"Marginulina robusta" = Cristellaria (Marginulina), "Marginulina zaspelovae" = Cristellaria (Marginulina)
"Marginulina robusta" = Cristellaria (Marginulina)
"Marginulina zaspelovae" = Cristellaria (Marginulina)
Nodosariata
 Robertinida - Ceratobuliminidae
Foraminifera
 Lituolacea - Ammosphaeroidinidae
 Hormosinacea - Hormosinidae
Reophax sp. de Montfort 1808
originally entered as "Rheophax spp."
 Ammodiscoidea - Ammodiscidae
 Trochamminacea - Trochamminidae