PBDB Collection

Boyarka River, Polyptychites polyptychus zone, Taymyr, Siberia (Cretaceous of Russian Federation)

Where: Russian Federation (70.5° N, 97.3° E: paleocoordinates 70.6° N, 81.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Valanginian (140.2 - 136.4 Ma)

• Polyptychites polyptychus zone

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone and lithified, sandy siltstone

• fairly shallow facies from the southernmost part of the Khatanga Basin

• with concretions

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 65459: authorized by Wolfgang Kiessling, entered by Uta Merkel on 22.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Gongylodinium acineum Gongylodinium acineum
Cephalopoda
Ammonitida - Polyptychitidae	Neocraspedites giganteus, Dichotomites tridichotomus, Dichotomites tener, Dichotomites terscisseformis, Dichotomites aff. tardescissus, "Dichotomites involutus" = Dichotomites (Dichotomites) bidichotomus, Dichotomites ex gr. polytomus, Polyptychites polyptychus Neocraspedites giganteus Imlay 1960 ammonite Dichotomites tridichotomus ammonite Dichotomites tener ammonite Dichotomites terscisseformis ammonite Dichotomites aff. tardescissus ammonite "Dichotomites involutus" = Dichotomites (Dichotomites) bidichotomus d'Orbigny 1841 ammonite Dichotomites ex gr. polytomus Koenen 1902 ammonite Polyptychites polyptychus Keyserling 1846 ammonite
Dinophyceae
-	Wallodinium krutzschii, Spiniferites sp., Apteodinium spongiosum, Trichodinium speetonense Wallodinium krutzschii Habib 1972 Spiniferites sp. Mantell 1850 Apteodinium spongiosum Trichodinium speetonense
Gonyaulacales - Gonyaulacaceae	Rhynchodiniopsis sp., Sirmiodinium grossii, Cribroperidinium sp., Hystrichodinium ex gr. pulchrum, Sentusidinium sp., Oligosphaeridium complex, Gonyaulacysta sp. Rhynchodiniopsis sp. Deflandre 1935 Sirmiodinium grossii Alberti 1961 Cribroperidinium sp. Neale and Sarjeant 1962 Hystrichodinium ex gr. pulchrum Deflandre 1935 Sentusidinium sp. Sarjeant and Stover 1978 Oligosphaeridium complex Davey and Williams 1966 Gonyaulacysta sp. Deflandre 1964 ex gr. cretacea/helicoidea
Gonyaulacales -	? Cleistosphaeridium sp. ? Cleistosphaeridium sp. Davey 1966
Gonyaulacales - Ceratiaceae	Muderongia simplex Muderongia simplex Alberti 1961
Gonyaulacales - Areoligeraceae	Cyclonephelium ex gr. cuculliforme Cyclonephelium ex gr. cuculliforme
Gonyaulacales -	Valensiella ex gr. ovula, Tanyosphaeridium ex gr. variecalamus Valensiella ex gr. ovula Tanyosphaeridium ex gr. variecalamus
Foraminifera
Ammodiscoidea - Ammodiscidae	Glomospirella gaultina Glomospirella gaultina
Nodosariata
Polymorphinida - Polymorphinidae	Globulina chetaensis, Globulina praelacrima Globulina chetaensis subspecies berriassica Globulina praelacrima
Nodosariida - Nodosariidae	Tristix ex gr. excavatum, Astacolus trigonius, Nodosaria incomes Tristix ex gr. excavatum Astacolus trigonius Nodosaria incomes
Foraminifera
-	"Marginulina corneola" = Cristellaria (Marginulina), "Marginulina robusta" = Cristellaria (Marginulina) "Marginulina corneola" = Cristellaria (Marginulina) "Marginulina robusta" = Cristellaria (Marginulina)