PBDB Collection

Paksa Peninsula, Polyptychites michalskii zone, Yakutia, Siberia (Cretaceous of Russian Federation)

Where: Russian Federation (73.9° N, 112.9° E: paleocoordinates 76.0° N, 89.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Early/Lower Valanginian (140.2 - 136.4 Ma)

• Polyptychites michalskii zone

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; lithified siltstone

• relatively deep water environments in the central part of the Khatanga Basin

• clayey siltstone with concretions, 40.8 m thick

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 65748: authorized by Wolfgang Kiessling, entered by Uta Merkel on 25.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Isthmocystis distincta, Lagenorhytis delicatula Isthmocystis distincta Lagenorhytis delicatula
Cephalopoda
Ammonitida - Polyptychitidae	Dichotomites sp., "Polyptychites ex gr. michalskii" = Polyptychites (Polyptychites) michalskii, "Neopolyptychites sp." = Polyptychites (Euryptychites), "Astieriptychites sp." = Polyptychites (Astieriptychites) Dichotomites sp. Koenen 1909 ammonite "Polyptychites ex gr. michalskii" = Polyptychites (Polyptychites) michalskii Bogoslowsky 1902 ammonite "Neopolyptychites sp." = Polyptychites (Euryptychites) Pavlow 1914 ammonite "Astieriptychites sp." = Polyptychites (Astieriptychites) Bodylevsky 1960 ammonite
Dinophyceae
-	Trichodinium speetonense Trichodinium speetonense
Gonyaulacales - Gonyaulacaceae	aff. Perisseiasphaeridium sp., cf. Leptodinium hyalodermopse, Tubotuberella apatela, Sirmiodinium grossii, Avellodinium sp., Cribroperidinium cf. spinoreticulatum, Hystrichodinium ex gr. pulchrum, Sentusidinium sp., Oligosphaeridium cf. poculum, Gonyaulacysta fastigiata aff. Perisseiasphaeridium sp. Davey and Williams 1966 listed as Perisseiasphaeridinium cf. Leptodinium hyalodermopse Tubotuberella apatela Ioannides et al. 1977 listed as Tubotubella Sirmiodinium grossii Alberti 1961 Avellodinium sp. Blackhouse 1988 Cribroperidinium cf. spinoreticulatum Hystrichodinium ex gr. pulchrum Deflandre 1935 Sentusidinium sp. Sarjeant and Stover 1978 Oligosphaeridium cf. poculum Jain 1977 Gonyaulacysta fastigiata Duxbury 1977
Gonyaulacales -	Dingodinium ex gr. tuberosum, Cleistosphaeridium sp. Dingodinium ex gr. tuberosum Cleistosphaeridium sp. Davey 1966 sp. B
Gonyaulacales - Areoligeraceae	Cyclonephelium cuculliforme, Circulodinium compta Cyclonephelium cuculliforme Circulodinium compta
Gonyaulacales -	Chlamydophorella sp., Valensiella ex gr. ovula, Tanyosphaeridium ex gr. variecalamus Chlamydophorella sp. Cookson and Eisenack 1958 Valensiella ex gr. ovula Tanyosphaeridium ex gr. variecalamus
Polypodiopsida
Schizaeales - Polypodiidae	Cicatricosisporites sp. Cicatricosisporites sp. Potonie and Gelletich 1933
Foraminifera
Ammodiscoidea - Ammodiscidae	Glomospira ex gr. arctica, Glomospirella ex gr. gaultina, Ammodiscus nuceus, Ammodiscus mackenziensis Glomospira ex gr. arctica Glomospirella ex gr. gaultina Ammodiscus nuceus Ammodiscus mackenziensis
Trochamminacea - Trochamminidae	Trochammina parviloculata Trochammina parviloculata
Lituolacea - Ammosphaeroidinidae	Recurvoides obskiensis, Recurvoides dubrovskajae Recurvoides obskiensis Recurvoides dubrovskajae
Astrorhizacea - Hemisphaeramminidae	Crithionina sp. Crithionina sp. Goës 1894
Nodosariata
Vaginulinida - Vaginulinidae	Lenticulina nivalis Lenticulina nivalis
Polymorphinida - Polymorphinidae	Globulina praelacrima Globulina praelacrima
Nodosariida - Nodosariidae	Astacolus suspectus Astacolus suspectus
Foraminifera
Lituolida - Haplophragmoididae	Cribrostomoides sinnosus, Cribrostomoides infracretaceus, Cribrostomoides romanovae, Haplophragmoides concavoides, Haplophragmoides votubilis Cribrostomoides sinnosus Cribrostomoides infracretaceus Cribrostomoides romanovae Haplophragmoides concavoides Haplophragmoides votubilis
Lituolida - Lituolidae	Gaudryina gerkei Gaudryina gerkei
-	Orietalia ex gr. baccula, "Marginulina turgida" = Cristellaria (Marginulina), "Marginulina corneola" = Cristellaria (Marginulina), "Marginulina striatocostata" = Cristellaria (Marginulina) Orietalia ex gr. baccula listed as Orientalia "Marginulina turgida" = Cristellaria (Marginulina) "Marginulina corneola" = Cristellaria (Marginulina) "Marginulina striatocostata" = Cristellaria (Marginulina)