Locality 1 - Shiratake Fm, Amakusa: Middle Eocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Eucyclidae
Lischkeia sp. Fischer 1879
Gastropoda - Turritellidae
Mesalia goshourensis Matsubara and Ugai 2006
Matsubara and Ugai 2006
Colpospira okadai
Colpospira tashiroi
Colpospira (Acutospira) tashiroi Kotaka 1959
Matsubara and Ugai 2006
Gastropoda - Potamididae
Vicarya sp. d'Archiac and Haime 1854
Gastropoda - Neogastropoda - Melongenidae
Sycostoma ? sp. Cox 1931
Matsubara and Ugai 2006
Gastropoda - Thersiteidae
"Orthaulax" japonicus Nagao 1924
Gastropoda - Naticidae
? Polinices eocenica Nagao 1928
recombined as Neverita eocenica
Neverita eocenica (Nagao 1928)
Matsubara and Ugai 2006
Bivalvia - Nuculanida - Sareptidae
Portlandia sp. Mörch 1857
Bivalvia - Lucinida - Lucinidae
Lucinidae indet. Fleming 1828
Matsubara and Ugai 2006
Bivalvia - Solenida - Solenidae
Solena sp. Mörch 1853
Bivalvia - Pholadida - Corbulidae
Caestocorbula ? subtumida (Nagao 1928)
Matsubara and Ugai 2006
Bivalvia - Cardiida - Veneridae
Callista (Microcallista) ariakensis (Nagao 1928)
Matsubara and Ugai 2006
Pitar hinokumai
Bivalvia - Cardiida - Tellinidae
Tellina (Tellinella) tricarinata Nagao 1928
Matsubara and Ugai 2006
Bivalvia - Mytilida - Mytilidae
Septifer ? sp. Récluz 1848
Matsubara and Ugai 2006
see common names

Geography
Country:Japan
Coordinates: 32.4° North, 130.2° East (view map)
Paleocoordinates:39.7° North, 124.1° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2-3
Key time interval:Middle Eocene
Age range of interval:47.80000 - 37.71000 m.y. ago
Stratigraphy
Formation:Shiratake
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Shiratake Fm, which conformably overlies the ?Early-Middle Eocene Akasaki Fm (and in places unconformably overlies Cretaceous sediments), and is conformably overlain by the Kyoragi Fm (Middle Eocene). THICKNESS: From bed within formation of group that attains a thickness of 100 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.
Lithology and environment
Primary lithology: lithified silty sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Silty sandstone. LITHIFICATION: Presumed lithified on the basis of age.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Shallow marine, siliciclastic environment.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (float),field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: COLLECTOR: Y. Takai (uknown date). REPOSITORY: Not stated in text, unknown.
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Farly modern nomenclature, and species-level assignments.
Metadata
Database number:71014
Authorizer:A. Hendy, W. Kiessling Enterer:A. Hendy, M. Krause
Modifier:A. Hendy Research group:marine invertebrate
Created:2007-04-14 18:48:42 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2008-04-14 18:48:42
Creative Commons license:CC BY
Reference information

Primary reference:
23772. A. Mizuno. 1964. Paleogene and Early Neogene molluscan faunae in West Japan. Geological Survey of Japan Report 204 [A. Hendy/A. Hendy]

Secondary references:

59769 T. Matsubara and H. Ugai. 2006. Paleoecology and Taxonomy of Middle Eocene Molluscs from the Shiratake Formation on Takeshima lsland, Amakusa lslands, Southwest Japan. Goshoura Cretaceous Museum 7:1-17 [W. Kiessling/M. Krause]