Sanchu Area, Shiroi Fromation, Honshu: Neocomian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pectinida - Anomiidae
Placunopsis pseudotruncata
Bivalvia - Ostreida - Bakevelliidae
Bakevellia (Neobakevellia) shinanoensis
Bivalvia - Arcida - Arcidae
Arca (Eonavicula) shinanoensis
original and current combination Eonavicula
Bivalvia - Cardiida - Neomiodontidae
Isodomella shiroiensis
Costocyrena otsukai
Protocyprina naumanni
Bivalvia - Cardiida - Corbiculidae
Tetoria (Paracorbicula) sanchuensis
Bivalvia - Pholadida - Ceratomyidae
Myopholas sp. Douvillé 1908
see common names

Geography
Country:Japan State/province:Gumma
Coordinates: 36.3° North, 138.7° East (view map)
Paleocoordinates:44.4° North, 140.8° East
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
10 m.y. bin:Cretaceous 1-2
Key time interval:Neocomian
Age range of interval:145.00000 - 125.77000 m.y. ago
Stratigraphy
Formation:Shiroi
Stratigraphic resolution:formation
Stratigraphy comments: Lower Neocomian, now regarded as lower part of Ishido Formation
Lithology and environment
Environment:marine indet.
Taphonomy
Modes of preservation:cast,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:40487
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-24 05:33:40 Last modified:2004-06-29 14:53:38
Access level:the public Released:2004-06-24 05:33:40
Creative Commons license:CC BY
Reference information

Primary reference:
10664. I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]