Also known as Naibuchi district, Kotoceras laevi ammonite zone, South Saghalin
Where: Sakhalin, Russian Federation (47.4° N, 142.8° E: paleocoordinates 51.4° N, 130.3° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Maastrichtian (72.1 - 66.0 Ma)
• Number III group; Kotoceras laevi ammonite zone. From E. YAZYKOVA (Acta Geologica Polonica, Vol. 54 (2004), No. 2, pp. 273-312): "this paper was the first detailed documentation of a Cretaceous ammonite zonation in central and southern Sakhalin. It should be noted, however, that there are numerous problems in that paper with regard to age assignment of the succession and to exposed intervals.For instance, no Albian faunas were recorded and Campanian deposits were misdated as Maastrichtian, Turonian as Coniacian, Santonian as Campanian, Danian as Maastrichtian, etc. Later, MATSUMOTO (1959c) noted that, at first glance, the zones proposed by SHIMIZU appeared to compare well to those then known in Europe, but in fact they often conflicted with data obtained during subsequent field work."
• formation-level stratigraphic resolution
Environment/lithology: marine; glauconitic sandstone and shale
Size class: macrofossils
Primary reference: S. Shimizu. 1935. The Upper Cretaceous cephalopods of Japan, Part I. J. Shanghai Sci. Inst.,sec. II 1(11):159-226 [R. Plotnick/R. Plotnick/R. Plotnick]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 64608: authorized by Roy Plotnick, entered by Roy Plotnick on 10.09.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Oxybeloceras jimboi, "Diplomoceras obstrictum" = Polyptychoceras (Polyptychoceras) obstrictum
Oxybeloceras jimboi ammonite
"Diplomoceras obstrictum" = Polyptychoceras (Polyptychoceras) obstrictum Jimbo 1894 ammonite | |
"Euhyphantoceras maastrichtiense n. gen. n. sp." = Hyphantoceras, Nipponites mirabiris
"Euhyphantoceras maastrichtiense n. gen. n. sp." = Hyphantoceras ammonite
Nipponites mirabiris ammonite | |
"Kotoceras laeve" = Damesites
"Kotoceras laeve" = Damesites ammonite | |
"Gaudryceras (Pseudogaudryceras) intermedium n. subgen." = Gaudryceras, "Gaudryceras (Neogaudryceras) tenuliratum" = Gaudryceras, "Epigoniceras glabrum" = Tetragonites glabrus
"Gaudryceras (Pseudogaudryceras) intermedium n. subgen." = Gaudryceras ammonite
"Epigoniceras glabrum" = Tetragonites glabrus Jimbo 1910 ammonite | |
Phylloceras subramosum ammonite |