Nevel'skaya Suite (lower) - Tokonbo River near Nevel'sk Town, Nevel'sk District, Sakhalin (Oligocene of Russian Federation)

Where: Russian Federation (50.8° N, 142.1° E: paleocoordinates 52.1° N, 139.6° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Nevel'skaya Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)

• STRATIGRAPHIC RELATIONS: From Nevel'skaya suite of the "Nevelisk" horizon, which lies between the "Kholmsk" (Late Oligocene) and "Uglegor" (Middle Miocene) horizons. THICKNESS: Total thickness of lower unit is 1000 m. AGE: Late Oligocene, on the basis of classification into the lower part of the "Nevelisk" horizon. STRATIGRAPHIC POSITION: Composite checklist for this part of the formation in this area.

• formation-level stratigraphic resolution

Environment/lithology: coastal; lithified, silty, sandy tuff

• ENVIRONMENT: Not stated in text; assumed to be cool-water coastal siliciclastic setting on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Tuffites, tuffs, tuffaceous sandstones, siltstones, argillites. LITHIFICATION: Lithified, assumed on the basis of age and facies.

Size class: macrofossils

Collection methods: COLLECTOR: Unknown, presumably Uwatoko (c. 1937). 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 70527: authorized by Austin Hendy, entered by Austin Hendy on 27.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for mollusca; no other groups listed. NOMENCLATURE: Not an authoritative publication, but nomenclature revised by specialists, with species and subgenus-level identifications.
Bivalvia
 Nuculida - Nuculidae
Acila (Acila) kholmskensis Krishtofovich 1964 divaricate nutclam
 Nuculanida - Tindariidae
 Nuculanida - Nuculanidae
Nuculana praerobai, "Nuculana (Crassoleda) crassatelloides" = Crassoleda crassatelloides
Nuculana praerobai pointed nut clam
COMMENTS: sensu lato
"Nuculana (Crassoleda) crassatelloides" = Crassoleda crassatelloides Lautenschlager 1957 pointed nut clam
 Nuculanida - Malletiidae
 Carditida - Carditidae
Cyclocardia tokunagai Yokoyama 1924 clam
 Hiatellida - Hiatellidae
Panopea cf. ramonensis Clark 1925 clam
 Cardiida - Ungulinidae
Diplodonta confusa Nagao 1928 clam