Soma Area, Yamagami Formation, Honshu: Callovian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pectinida - Limidae
Plagiostoma aff. subcardiiforme
Bivalvia - Cardiida - Arcticidae
Pronoella sugayensis
Bivalvia - Lucinida - Lucinidae
Mesolinga masatanii
Fimbria somensis
Bivalvia - Trigoniida - Myophorellidae
Myophorella (Promyophorella) sugayensis
Scaphotrigonia somensis
spelled with current rank as Myophorella (Scaphotrigonia)
Bivalvia - Trigoniida - Trigoniidae
Ibotrigonia masatanii
Nipponitrigonia sagawai
subsp. sagawai
Latitrigonia unicarinata
Latitrigonia unituberculata
see common names

Geography
Country:Japan State/province:Fukushima
Coordinates: 37.8° North, 140.9° East (view map)
Paleocoordinates:45.8° North, 145.6° East
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Callovian 10 m.y. bin:Jurassic 5
Key time interval:Callovian
Age range of interval:166.10000 - 163.50000 m.y. ago
Stratigraphy
Geological group:Soma Formation:Yamagami
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: sandstone
Secondary lithology: "shale"
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:40545
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-25 01:41:11 Last modified:2004-06-29 15:22:23
Access level:the public Released:2004-06-25 01:41:11
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]