Where: Russian Federation (47.0° N, 142.1° E: paleocoordinates 50.7° N, 134.7° E)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Takaradayskaya Formation, Early/Lower Eocene (55.8 - 48.6 Ma)
• STRATIGRAPHIC RELATIONS: Also known as Nishisakutan Fm, Maoka Series. From Takaradayskaya suite of the upper part of the "Shebunin and Kraspnopoliev" horizons, which are overlain by the Late Eocene Lesogor "horizon". THICKNESS: Total thickness of unit is 1000 m. AGE: Eocene, though apparently lower part of Eocene, on the basis of assignment to the "Shebunin and Kraspnopoliev" horizons. STRATIGRAPHIC POSITION: Composite checklist for formation in this area.
• formation-level stratigraphic resolution
Environment/lithology: coastal; lithified siltstone and lithified, argillaceous sandstone
Size class: macrofossils
Collection methods: COLLECTOR: Unknown, presumably Uwatoko (c. 1937) or Smekhov (c. 1948). REPOSITORY: Unknown repository.
Primary reference: A. I. Kafanov and K. Ogasawara. 2003. Neogene and Paleogene Molluscan (Bivalvia) Cenozones of Sakhalin and Kurile Islands. Science Reports, Institute of Geoscience, University of Tsukuba 24:45-79 [A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 70564: authorized by Austin Hendy, entered by Austin Hendy on 28.03.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"? Spisula (Pseudocardium) ikusaensis" = Pseudocardium, ? Mactra asymmetrica, ? Mactra kavakamiensis
"? Spisula (Pseudocardium) ikusaensis" = Pseudocardium clam
? Mactra asymmetrica clam | |
Ciliatocardium zhidkovae, Ciliatocardium asagaiense, Ciliatocardium evsseevi, Nemocardium nodaense, Nemocardium takaradaiense, Nemocardium (Nemocardium) kovatschense, Nemocardium (Nemocardium) yokoyamai, Nemocardium (Nemocardium) ezoense
Ciliatocardium zhidkovae cockle
Ciliatocardium asagaiense Makiyama 1934 cockle
Ciliatocardium evsseevi Kafanov and Savizky 1982 cockle
Nemocardium nodaense cockle
Nemocardium takaradaiense cockle
Nemocardium (Nemocardium) yokoyamai Takeda 1953 cockle
Nemocardium (Nemocardium) ezoense Takeda 1953 cockle | |
Mya sachalinensis, "Mya (Mya) cf. uzenensis" = Mya (Mya) pseudoarenaria, Mya (Mya) cf. cuneiformis, Mya (Arenomya) grewingki
Mya sachalinensis Kristofovich 1957 softshell clam
"Mya (Mya) cf. uzenensis" = Mya (Mya) pseudoarenaria Schlesch 1931 softshell clam
Mya (Mya) cf. cuneiformis Bohm 1915 softshell clam | |
"Lucinoma cf. annulata" = Lucinoma annulatum
"Lucinoma cf. annulata" = Lucinoma annulatum Reeve 1850 clam | |
| |
Ostrea agnevoensis oyster
Ostrea esutoruensis oyster | |
Delectopecten peckhami Gabb 1869 scallop | |
Mytilus (Mytilus) pilvoensis mussel | |
Nuculana (Saccella) pseudoscissurata Takeda 1953 pointed nut clam
Nuculana (Nuculana) napanica pointed nut clam | |
Megayoldia (Portlandella) watasei Kanehara 1937 clam | |
Yoldia subpilvoensis, Yoldia angusta, "Megayoldia (Portlandella) nitida" = Yoldia nitida, Yoldia (Yoldia) kovatschensis, Yoldia (Yoldia) gretschishkini, Yoldia (Nampiella) takaradaiensis
Yoldia subpilvoensis clam
Yoldia angusta clam
"Megayoldia (Portlandella) nitida" = Yoldia nitida Brocchi 1814 clam
Yoldia (Nampiella) takaradaiensis Kristofovich 1957 clam | |
Acila (Truncacila) osugii Nagao and Huzioka 1941 divaricate nutclam
Acila (Acila) praedivaricata Nagao and Huzioka 1941 divaricate nutclam
Acila (Acila) gettysburgensis Regan 1909 divaricate nutclam |