N01-05, Na Trang village, Lang Son City (Triassic of Vietnam)

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

• Fossiliferous dark 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

 Spumellaria - Oertlispongidae
Paroertlispongus spinorientalis Takahashi 2014 radiolarian
 Entactinaria - Tetrentactiniidae
Multisphaera triassorobusta Takahashi 2014 radiolarian
 Entactinaria - Pentactinocarpidae
? Pentactinocarpus aff. acanthicus Dumitrica 1978 radiolarian
 Entactinaria - Entactiniidae
? Spongentactinia sp. Nazarov 1975 radiolarian
? Retentactinia parvisphaera n. sp. Takahashi 2014 radiolarian
? Retentactinia kycungensis n. sp. Takahashi 2014 radiolarian
Entactinosphaera sp. Foreman 1963 radiolarian
? Plenoentactinia terespongia Takahashi 2014 radiolarian
 Entactinaria - Thalassothamnidae
Triassothamnus verticillatus Dumitrica 1980 radiolarian
 Entactinaria - Palaeoscenidiidae
Parentactinia nakatsugawaensis Sashida 1983 radiolarian
Parentactinia cf. pugnax Dumitrica 1978 radiolarian
 Pectinida - Claraiidae
Crittendenia australasiatica Krumbeck 1924 scallop
 Ceratitida - Xenoceltitidae
Xenoceltites variocostatus Brayard and Bucher 2008 ceratite