Soma Area, Nakanosawa Formation, Honshu: Kimmeridgian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Trigoniida - Trigoniidae
Bivalvia - Protobranchia - Nuculanidae
Bivalvia - Carditida - Astartidae
Bivalvia - Pholadida - Ceratomyidae
Bivalvia - Pholadida - Corbulidae
? Corbula globosa Sowerby 1818
Bivalvia - Pandorida - Laternulidae
Bivalvia - Pholadomyida - Pholadomyidae
Homomya gibbosa Sowerby 1814
Bivalvia - Thraciida - Thraciidae
Bivalvia - Cardiida - Cardiidae
Bivalvia - Venerida - Arcticidae
Bivalvia - Trigoniida - Pterotrigoniidae
Bivalvia - Trigoniida - Myophorellidae
Bivalvia - Limida - Limidae
Bivalvia - Ostreida - Gryphaeidae
Bivalvia - Ostreida - Bakevelliidae
Bivalvia - Ostreida - Pteriidae
Bivalvia - Ostreida - Pinnidae
Bivalvia - Arcida - Parallelodontidae
Bivalvia - Pectinida - Pectinidae
Bivalvia - Pectinida - Plicatulidae
Bivalvia - Pectinida - Entoliidae
Bivalvia - Mytilida - Mytilidae
Arcomytilus laitmairensis (de Loriol 1883)
see common names

Geography
Country:Japan State/province:Fukushima
Coordinates: 37.8° North, 140.9° East (view map)
Paleocoordinates:57.4° North, 151.5° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Jurassic Epoch: Late Jurassic
Stage: Kimmeridgian 10 m.y. bin: Jurassic 6
Key time interval: Kimmeridgian
Age range of interval: 154.8 - 149.2 m.y. ago
Stratigraphy
Geological group:Soma Formation:Nakanosawa
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: calcareous sandstone
Secondary lithology: "limestone"
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:40546
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-25 01:42:53 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-06-25 01:42:53
Creative Commons license:CC0
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]