N01-06, Na Trang village, Lang Son City: Smithian, Vietnam
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Protozoa
- Entactinaria
- Tetrentactiniidae
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Multisphaera triassorobusta
Takahashi 2014
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Shigeta et al. 2014 | |||||||||
Protozoa
- Entactinaria
- Palaeoscenidiidae
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Parentactinia nakatsugawaensis
Sashida 1983
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Shigeta et al. 2014 | |||||||||
Protozoa
- Entactinaria
- Entactiniidae
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? Plenoentactinia terespongia
Takahashi 2014
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Shigeta et al. 2014 | |||||||||
? Retentactinia parvisphaera
Takahashi 2014
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Shigeta et al. 2014 | |||||||||
Protozoa
- Entactinaria
- Thalassothamnidae
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Triassothamnus verticillatus
(Dumitrica 1980)
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Shigeta et al. 2014 | |||||||||
Protozoa
- Spumellaria
- Oertlispongidae
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Paroertlispongus spinorientalis
Takahashi 2014
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Shigeta et al. 2014 | |||||||||
Cephalopoda
- Ceratitida
- Xenoceltitidae
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Xenoceltites variocostatus
Brayard and Bucher 2008
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(10 measurements) | ||||||||||
Bivalvia
- Pectinida
- Claraiidae
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Crittendenia australasiatica
(Krumbeck 1924)
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Crittendenia langsonensis
Komatsu and Dang 2013
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Not listed at this level in Shigeta et al., 2014 | ||||||||||
Bivalvia
- Pectinida
- Hunanopectinidae
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Leptochondria bittneri
(Kiparisova 1938)
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Shigeta et al. 2014 | |||||||||
Bivalvia
- Ostreida
- Posidoniidae
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Bositra limbata
(Guo 1985)
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Shigeta et al. 2014 | |||||||||
Conodonta
- Ozarkodinida
- Gondolellidae
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? Icriospathodus zaksi
(Buryi 1979)
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Shigeta et al. 2014 | |||||||||
Novispathodus informal sp. A
Orchard 2005
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Shigeta et al. 2014 | |||||||||
Novispathodus pingdingshanensis
(Zhao and Orchard 2007)
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Shigeta et al. 2014 | |||||||||
see common names |
Geography
Country: | Vietnam |
Coordinates: | 21.9° North, 106.7° East (view map) |
Paleocoordinates: | 6.3° North, 98.3° East |
Basis of coordinate: | stated in text |
Geographic resolution: | small collection |
Time
Period: | Triassic | Epoch: | Early/Lower Triassic |
Stage: | Olenekian | 10 m.y. bin: | Triassic 1 |
Key time interval: | Smithian | ||
Age range of interval: | 251.30000 - 247.20000 m.y. ago |
Stratigraphy
Formation: | Bac Thuy | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Upper Smithian |
Lithology and environment
Primary lithology: | gray lithified mudstone |
Secondary lithology: | nodular lithified "limestone" |
Includes fossils? | Y |
Lithology description: Elongated spherical calcareous nodules (5-60 cm in length) in dark mudstone | |
Environment: | carbonate indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Reason for describing collection: | taxonomic analysis |
Collection method comments: Repository: All cephalopod, gastropod, ostracod and conodont specimens are reposited at the National Museum of Nature and Science, Tsukuba. Bivalves are stored in the Faculty of Science, Kumamoto University, Kumamoto, and radiolarian specimens are stored at Tokyo Gakugei University, Koganei. |
Metadata
Also known as: | NT01-07 | ||
Database number: | 143597 | ||
Authorizer: | M. Clapham | Enterer: | M. Clapham |
Modifier: | M. Clapham | Research group: | marine invertebrate |
Created: | 2013-04-25 06:30:00 | Last modified: | 2014-04-16 10:33:15 |
Access level: | the public | Released: | 2013-04-25 06:30:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
46521. | T. Komatsu, Y. Shigeta, T. H. Dang, C. T. Dinh, T. Maekawa and G. Tanaka. 2013. Crittendenia (Bivalvia) from the Lower Triassic (Olenekian) Bac Thuy Formation, An Chau Basin, northern Vietnam. Paleontological Research 17:1-11 [M. Clapham/M. Clapham] |