Tha Cho, loc. 2 (Triassic to of Vietnam)

Where: Vietnam (21.8° N, 106.8° E: paleocoordinates 12.0° N, 97.7° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Na Khuat Formation, Anisian to Anisian (247.2 - 237.0 Ma)

• lower part of the formation, Costatoria goldfussi mansuyi-Trigonodus tonkinensis assemblage

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified mudstone and lithified sandstone

• accumulated during repetition of storm- and fair-weather conditions in inner shelf environments
• bioturbated mudstone with intercalated very-fine- to fine-grained sandstone beds

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: T. Komatsu, D. T. Huyen, and N. D. Huu. 2010. Radiation of Middle Triassic bivalve: bivalve assemblages characterized by infaunal and semi-infaunal burrowers in a storm- and wave-dominated shelf, An Chau Basin, north Vietnam. Palaeogeography, Palaeoclimatology, Palaeoecology 291:190-204 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 99744: authorized by Wolfgang Kiessling, entered by Uta Merkel on 19.11.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Ostreida - Pteriidae
Pteria sturi
Pteria sturi Bittner 1895 pearl oyster
 Pectinida - Entoliidae
Entolium tridentini
 Trigoniida - Trigonodidae
Trigonodus trapezoidalis, Trigonodus tonkinensis
 Trigoniida - Myophoriidae
Costatoria goldfussi, Costatoria radiata
Costatoria goldfussi Alberti 1830 clam
subsp. mansuyi
Costatoria radiata Loczy 1899 clam
subsp. hsuei