Also known as NT01-05
Where: Vietnam (21.9° N, 106.7° E: paleocoordinates 6.3° N, 98.3° E)
• coordinate stated in text
• small collection-level geographic resolution
When: Bac Thuy Formation, Smithian (251.3 - 247.2 Ma)
• Upper Smithian
• bed-level stratigraphic resolution
Environment/lithology: lithified, shelly/skeletal, gray limestone
Size class: macrofossils
Collection methods: 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.
Primary reference: 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]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 143596: authorized by Matthew Clapham, entered by Matthew Clapham on 25.04.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
| Polycystina | |
? Spongentactinia sp., Entactinosphaera sp., ? Plenoentactinia terespongia, ? Retentactinia kycungensis n. sp., ? Retentactinia parvisphaera n. sp.
? Spongentactinia sp. Nazarov 1975
Entactinosphaera sp. Foreman 1963
? Plenoentactinia terespongia Takahashi 2014
? Retentactinia kycungensis n. sp. Takahashi 2014
? Retentactinia parvisphaera n. sp. Takahashi 2014 | |
|
Triassothamnus verticillatus Dumitrica 1980 | |
|
Multisphaera triassorobusta Takahashi 2014 | |
|
? Pentactinocarpus aff. acanthicus Dumitrica 1978 | |
|
Parentactinia cf. pugnax Dumitrica 1978
Parentactinia nakatsugawaensis Sashida 1983 | |
|
Paroertlispongus spinorientalis Takahashi 2014 | |
| Cephalopoda | |
|
Xenoceltites variocostatus Brayard and Bucher 2008 ceratite | |
| Bivalvia | |
|
Crittendenia australasiatica Krumbeck 1924 scallop | |