B-zawa Valley, T1, Takakura-yama Mountain, Iwaki City: Wordian, Japan
collected by J. Tazawa, N. Kaneko, S. Hasegawa 1986-2005
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Spiriferida
- Spiriferellidae
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Alispiriferella sp.
Waterhouse and Waddington 1982
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Tazawa et al. 2015 | |||||||||
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Rhynchonellata
- Spiriferida
- Trigonotretidae
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Gypospirifer kobiyamai
Tazawa and Araki 2013
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Neospirifer sp.
Fredericks 1919
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Rhynchonellata
- Spiriferida
- Strophopleuridae
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Pterospirifer alatus
(von Schlotheim 1813)
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Rhynchonellata
- Athyridida
- Neoretziidae
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Hustedia ratburiensis
Waterhouse and Piyasin 1970
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Rhynchonellata
- Terebratulida
- Dielasmatidae
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Dielasma sp.
King 1856
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Strophomenata
- Strophomenida
- Rugosochonetidae
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Chonetinella krotovi
(Fredericks 1925)
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Chonetinella transversa
Tazawa 2008
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Dyoros (Dyoros) sp.
Stehli 1954
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Strophomenata
- Productida
- Paucispiniferidae
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Transennatia gratiosa
(Waagen 1884)
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Lamnimargus peregrinus
(Fredericks 1924)
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| (1 measurement) | ||||||||||
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Strophomenata
- Productida
- Productellidae
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Echinauris sp.
Muir-Wood and Cooper 1960
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Rugoconcha sp.
Jin and Sun 1981
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Strophomenata
- Productida
- Productidae
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Yakovlevia mammatiformis
(Fredericks 1926)
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Strophomenata
- Productida
- Monticuliferidae
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Haydenella sp.
(Reed 1944)
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| (2 measurements) | ||||||||||
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= Haydenella wenganensis
Huang 1932
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Tazawa et al. 2015 | |||||||||
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Costatumulus tazawai
Shen et al. 2000
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
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Strophomenata
- Productida
- Linoproductidae
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Megousia auriculata
Muir-Wood and Cooper 1960
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Tazawa et al. 2015 | |||||||||
| (1 measurement) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 37.1° North, 140.9° East (view map) |
| Paleocoordinates: | 22.2° North, 113.1° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | outcrop |
Time
| Period: | Permian | Epoch: | Guadalupian |
| Stage: | Wordian | 10 m.y. bin: | Permian 4 |
| Key time interval: | Wordian | ||
| Age range of interval: | 266.90000 - 264.28000 m.y. ago |
Stratigraphy
| Formation: | Takakurayama | Member: | Iriishikura | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 30 m below top of Iriishikura Member. Wuchiapingian according to Tazawa et al. (2015), but occurs below members with Guadalupian ammonoids. | |||||
Lithology and environment
| Primary lithology: | gray lithified sandy "shale" |
| Includes fossils? | Y |
| Lithology description: sandy shale | |
| Environment: | marine indet. |
| Geology comments: probably derived from shallow marine continental shelf to a deep-sea basin by sediment-gravity flows | |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | J. Tazawa, N. Kaneko, S. Hasegawa | Collection dates: | 1986-2005 |
| Collection method comments: Repository: Fukushima Museum, Japan (FM-N), Tohoku University Museum in Sendai (IGPS), Department of Geology, Faculty of Science, Niigata University (NU-B) | |||
Metadata
| Database number: | 118972 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2011-10-19 14:50:51 | Last modified: | 2023-03-17 00:05:35 |
| Access level: | the public | Released: | 2011-10-19 14:50:51 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 38216. | J. I. Tazawa. 2008. Brachiopods from the Upper Permian Takakurayama Formation, Abukuma Mountains, northeast Japan. Science Reports, Niigata University (Geology) 23:13-53 [M. Clapham/M. Clapham] |
Secondary references:
| 54150 | J. I. Tazawa, N. Kaneko, C. Suzuki and S. Hasegawa. 2015. Late Permian (Wuchiapingian) brachiopod fauna from the lower Takakurayama Formation, Abukuma Mountains, northeastern Japan. Paleontological Research 19:33-51 [M. Clapham/M. Clapham] |