Boyarka River, Homolsomites bojarkensis zone, Taymyr, Siberia (Cretaceous to of Russian Federation)

Where: Russian Federation (70.5° N, 97.3° E: paleocoordinates 70.4° N, 81.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Valanginian to Late/Upper Valanginian (140.2 - 130.0 Ma)

• Homolsomites bojarkensis zone

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone and lithified siltstone

• fairly shallow facies from the southernmost part of the Khatanga Basin
• sandstone with concretions and clayey siltstone

Size classes: macrofossils, microfossils

Primary reference: N. I. Shulgina, M. D. Burdykina, V. A. Basov and N. Arhus. 1994. Distribution of ammonites, foraminifera and dinoflagellate cysts in the Lower Cretaceous reference sections of the Khatanga Basin, and Boreal Valanginian biogeography. Cretaceous Research 15(1):1-16 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 65463: authorized by Wolfgang Kiessling, entered by Uta Merkel on 22.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Polyptychitidae
Foraminifera
 Lagenina - Ichthyolariidae
 Lituolida - Haplophragmoididae
 Ammodiscoidea - Ammodiscidae
  -
"Marginulina striatocostata" = Cristellaria (Marginulina), "Marginulina pyramidalis" = Cristellaria (Marginulina), "Marginulina aff. zaspelovae" = Cristellaria (Marginulina), "Marginulina corneola" = Cristellaria (Marginulina), "Marginulina robusta" = Cristellaria (Marginulina), "Marginulina ex gr. linearis" = Cristellaria (Marginulina), "Marginulina turgida" = Cristellaria (Marginulina)
"Marginulina striatocostata" = Cristellaria (Marginulina)
"Marginulina pyramidalis" = Cristellaria (Marginulina)
"Marginulina aff. zaspelovae" = Cristellaria (Marginulina)
"Marginulina corneola" = Cristellaria (Marginulina)
"Marginulina robusta" = Cristellaria (Marginulina)
"Marginulina ex gr. linearis" = Cristellaria (Marginulina)
"Marginulina turgida" = Cristellaria (Marginulina)
Nodosariata
 Vaginulinida - Vaginulinidae
"Lenticulina muensteri" = Lenticulina munsteri Roemer 1839
 Nodosariida - Nodosariidae
 Polymorphinida - Polymorphinidae
Globulina chetaensis
subspecies berriassica
"Paradentalina sp." = Enantiodentalina Marie 1941