M4 clay bed, Tsunozu Gp - Ida, Shimane Prefecture: Early/Lower Pleistocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
? Nuttalia sp.
Gastropoda - Batillariidae
Batillaria zonalis
Gastropoda - Tonnidae
? Tonna sp. Brünnich 1772
Gastropoda - Neogastropoda - Muricidae
Rapana cf. thomsoni
Bivalvia - Mytilida - Mytilidae
Musculista perfragilis
Musculista senhousia (Benson 1842)
Listed as "M. senhausia" - misspelling
Modiolus sp. (Lamarck 1801)
Bivalvia - Arcida - Arcidae
Anadara sp. Gray 1847
Bivalvia - Pectinida - Pectinidae
Chlamys (Amuzapecten) nipponensis
Bivalvia - Pectinida - Anomiidae
Anomia chinensis
Bivalvia - Ostreida - Ostreidae
"Ostrea" sp. Linnaeus 1758
Bivalvia - Cardiida - Tellinidae
? Moerella sp. Fischer 1887
spelled with current rank as Tellina (Moerella)
Nitidotellina nitidula
spelled with current rank as Tellina (Nitidotellina)
Macoma incongrua (Martens 1865)
recombined as Macoma (Macoma) incongrua
Bivalvia - Cardiida - Veneridae
? Callista chinensis (Holten 1802)
recombined as Callista (Callista) chinensis
? Cyclina sp.
Ruditapes philippinarum
Bivalvia - Cardiida - Trapezidae
Trapezium sp. Mühlfeld 1811
Trapezium (Neotrapezium) sublaevigatum (Lamarck 1819)
Bivalvia - Cardiida - Corbiculidae
Corbicula sp. Megerle 1811
Bivalvia - Pholadida - Corbulidae
Anisocorbula venusta
spelled with current rank as Corbula (Anisocorbula)
Bivalvia - Solenida - Solenidae
Solen sp. Linnaeus 1758
see common names

Geography
Country:Japan County:Shimane
Coordinates: 35.1° North, 132.4° East (view map)
Paleocoordinates:35.4° North, 132.0° East
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Quaternary Epoch:Pleistocene
10 m.y. bin:Cenozoic 6
Key time interval:Early/Lower Pleistocene
Age range of interval:2.58000 - 0.77400 m.y. ago
Stratigraphy
Geological group:Tsunozu
Local section:Ida
Regional section:Shimane
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: M4 clay bed of the Tsunozu Group. AGE: In the Ida area, the Plio-Pleistocene boundary is placed just above the M3 clay bed of the Tsunozu Gp. Accordingly the age of the M4 clay be is considered to be somewhat younger than the 1.6 Ma.
Lithology and environment
Primary lithology: unlithified claystone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: No lithology data reported in text, other than clay. LITHIFICATION: Presumed unlithified. No comments on lithification in text and no figures, but given age and lack of submarine burial, it is likely that this is an unlithified or poorly-lithified collection.
Environment:transition zone/lower shoreface
Geology comments: BATHYMETRY: Upper sublittoral zone. THERMAL TOLERANCES: Cool water fauna. The cool to cold Omma-Manganji molluscan fauna are prevalent, however the warm-water fauna is represented by a couple taxa. Temperate to cool marine climate.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: COLLECTOR: Imamura, Okamoto and Amimoto. REPOSITORY: Yamaguchi Prefectural Museum.
Taxonomic list comments:COMPLETENESS: Representative, but probably not exhaustive second-hand list. NOMENCLATURE: Not an authoritative publication, slightly outdated nomenclature, but with species-level identifications and subgeneric classification.
Metadata
Database number:62301
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2006-07-17 21:15:57 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-07-17 21:15:55
Creative Commons license:CC BY
Reference information

Primary reference:
18005. K. Okamoto and M. Ibaraki. 1988. Early Pleistocene fossil Mollusca from the sea of Japan off Yamaguchi Prefecture. Saito Ho-on Kai Special Publication 1:523-532 [A. Miller/A. Hendy/P. Wagner]