Obirashibe River: Middle Turonian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Patellida
- Lottiidae
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Patelloida obirensis n. sp.
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| "more than a hundred specimens" | ||||||||||
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus hobetsensis
Nagao and Matsumoto 1939
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Cephalopoda
- Ammonitida
- Desmoceratidae
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Mesopuzosia sp.
Matsumoto 1954
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Cephalopoda
- Ammonitida
- Tetragonitidae
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Gaudryceras denseplicatum
(Jimbo 1894)
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| recombined as Gaudryceras (Gaudryceras) denseplicatum | ||||||||||
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Tetragonites glabrus
(Jimbo 1910)
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Cephalopoda
- Ammonitida
- Scaphitidae
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Otoscaphites puerculus
(Jimbo 1894)
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| recombined as Yezoites puerculus | ||||||||||
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Scaphites planus
(Yabe 1910)
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| synonym of Yezoites puerculus | ||||||||||
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Cephalopoda
- Phylloceratida
- Phylloceratidae
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Neophylloceras subramosum
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| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 44.1° North, 141.9° East (view map) |
| Paleocoordinates: | 51.8° North, 134.2° East |
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Turonian | 10 m.y. bin: | Cretaceous 6 |
| *Period: | Late/Upper Cretaceous | *Epoch: | Gallic |
| *International age/stage: | Middle Turonian | ||
| Key time interval: | Middle Turonian | ||
| Age range of interval: | 93.90000 - 89.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Saku | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Middle Yezo Group | |||||
Lithology and environment
| Primary lithology: | calcareous mudstone | ||
| Lithology description: massive mudstone | |||
| Environment: | offshore | Tectonic setting: | forearc basin |
| Geology comments: "intermediate between nearshore, shelf environments and offshore, deep water environments... outer shelf deposits in Cretaceous forearch basin" | |||
Taphonomy
| Modes of preservation: | body,concretion |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: gastropod from "an erratic, round calcareous concretion" and other fossils from a "massive mudstone yielding the concretion" | |
Metadata
| Also known as: | NSM PCL3-38-1; Locality 8; Locality R4018 in Tanabe et al. 1977 | ||
| Database number: | 4877 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | marine invertebrate |
| Created: | 1999-08-28 10:58:32 | Last modified: | 1999-08-28 13:58:32 |
| Access level: | the public | Released: | 2000-11-20 13:53:24 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 293. | T. Kase and Y. Shigeta. 1996. New species of Patellogastropoda (Mollusca) from the Cretaceous of Hokkaido, Japan and Sakhalin, Russia. Journal of Paleontology 70(5):762-771 [J. Alroy/J. Alroy/J. Alroy] |