Toyoda Area, Higashinagano Formation, Honshu: Sinemurian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Protobranchia - Nuculanidae
Bivalvia - Cardiida - Cardiidae
Bivalvia - Lucinida - Lucinidae
Bivalvia - Carditida - Carditidae
Tutcheria itoi Hayami 1969
Bivalvia - Carditida - Cardiniidae
Cardinia toriyamai Hayami 1958
Bivalvia - Carditida - Astartidae
Bivalvia - Trigoniida - Prosogyrotrigoniidae
Bivalvia - Pectinida - Pectinidae
Chlamys textoria (Schlotheim 1820)
Bivalvia - Pectinida - Entoliidae
Entolium cf. calvum (Goldfuss 1836)
= Camptonectes
Entolium cf. lunare (Roemer 1839)
= corneolum
Bivalvia - Pectinida - Plicatulidae
Bivalvia - Pectinida - Oxytomidae
Bivalvia - Limida - Limidae
Bivalvia - Ostreida - Ostreidae
Bivalvia - Ostreida - Gryphaeidae
Bivalvia - Mytilida - Mytilidae
Bivalvia - Arcida - Parallelodontidae
see common names

Geography
Country:Japan State/province:Yamaguchi
Coordinates: 34.2° North, 131.0° East (view map)
Paleocoordinates:49.4° North, 157.6° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Jurassic Epoch: Early Jurassic
Stage: Sinemurian 10 m.y. bin: Jurassic 1
Key time interval: Sinemurian
Age range of interval: 199.5 - 192.9 m.y. ago
Stratigraphy
Geological group:Toyora Formation:Higashinagano
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: sandy "shale"
Secondary lithology:fine sandstone
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:40560
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-25 06:34:48 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-06-25 06:34:48
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]