Shizukawa Area, Niranohama Formation, Honshu: Hettangian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Mytilida
- Mytilidae
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Modiolus bakevelloides
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Bivalvia
- Ostreida
- Bakevelliidae
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Bakevellia (Neobakevellia) trigona
(Yokoyama 1904)
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Bivalvia
- Ostreida
- Pteriidae
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Pteria kitakamiensis
Hayami 1958
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Bivalvia
- Ostreida
- Malleidae
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Isognomon (Isognomon) rikuzenicus
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Bivalvia
- Arcida
- Parallelodontidae
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Grammatodon (Indogrammatodon) nakanoi
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Parallelodon (Cosmetodon) niranohamensis
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Bivalvia
- Arcida
- Cucullaeidae
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Cucullaea (Idonearca) mabuchii
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Bivalvia
- Cardiida
- Cardiidae
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Integricardium (Yokoyamaina) hayamii
Keen 1969
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Bivalvia
- Cardiida
- Neomiodontidae
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Eomiodon lunulatus
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Eomiodon vulgaris
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? Eomiodon giganteus
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Bivalvia
- Poromyida
- Cuspidariidae
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? Cuspidaria praenipponica
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Bivalvia
- Thraciida
- Thraciidae
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Thracia subrhombica
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Bivalvia
- Carditida
- Astartidae
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Coelastarte cardiniiformis
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| reassigned as Neocrassina (Coelastarte) | ||||||||||
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Bivalvia
- Trigoniida
- Trigoniidae
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Geratrigonia lata
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| possibly conspecific with G. hosourensis | ||||||||||
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Geratrigonia hosourensis
(Yokoyama 1904)
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Trigonia senex
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Bivalvia
- Trigoniida
- Myophorellidae
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? Orthotrigonia midareta
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| original and current combination Myophorella (Orthotrigonia) | ||||||||||
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Vaugonia (Vaugonia) niranohamensis
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Vaugonia (Vaugonia) namigashira
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| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Miyagi |
| Coordinates: | 38.7° North, 141.4° East (view map) | ||
| Paleocoordinates: | 49.7° North, 152.7° East | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | local area |
Time
| Period: | Jurassic | Epoch: | Early/Lower Jurassic |
| Stage: | Hettangian | 10 m.y. bin: | Jurassic 1 |
| Key time interval: | Hettangian | ||
| Age range of interval: | 201.40000 - 199.50000 m.y. ago |
Stratigraphy
| Geological group: | Shizukawa | Formation: | Niranohama |
| Stratigraphic resolution: | 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: | 40541 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | S. Nurnberg | Research group: | marine invertebrate |
| Created: | 2004-06-25 01:08:33 | Last modified: | 2004-06-29 15:07:33 |
| Access level: | the public | Released: | 2004-06-25 01:08:33 |
| 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] |