Chulabhorn Dam (Triassic of Thailand)

Also known as Nam Phrom Dam

Where: Chaiyaphum, Thailand (16.5° N, 101.6° E: paleocoordinates 20.1° N, 91.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Huai Hin Lat Formation, Norian (228.0 - 208.5 Ma)

• Palynomophs contain the formation to Carnian-Norian (Racey & Goodall 2009. Geol. Soc. Lond. Spec. Publ. 315: 69-83), whereas a Norian age is suggested by plant, ostracod and vertebrate remains (e.g. Buffetaut 1983. APP 28: 43-53)

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; black shale and limestone

• "quiet lacustrine environment, with anaerobic conditions at the bottom" (Buffetaut 1983)

Size class: macrofossils

Collected by Thai-French expedition in 1980

Collection methods: surface (float), surface (in situ), chemical,

Primary reference: E. Buffetaut and R. Ingavat. 1982. Phytosauria remains (Reptilia, Thecodontia) from the Upper Triassic of north-eastern Thailand. Geobios 15:7-17 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 89992: authorized by Richard Butler, entered by Richard Butler on 24.06.2009, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Dipnoi - Ptychoceratodontidae
"Ceratodus cf. szechuanensis" = Ptychoceratodus szechuanensis1
"Ceratodus cf. szechuanensis" = Ptychoceratodus szechuanensis1 Young 1942 lungfish
Tooth
Coelacanthimorpha
 Coelacanthiformes - Coelacanthidae
Coelacanthidae indet. Agassiz 1843 coelacanth
Fragmentary scales
Amphibia
 Temnospondyli - Cyclotosauridae
Cyclotosaurus sp.2 Fraas 1889 tetrapod
DMR no C.D 001, partial skull
 Temnospondyli -
Plagiosauroidea indet.3 Abel 1919 tetrapod
TF 1453, bone fragment
Reptilia
 Phytosauria -
Phytosauria indet. archosaur
TF 1440-1a, TF 1440-1b, jaw fragments; TF 1440-1c, TF 1440-1d, isolated teeth. Material shows similarities to Nicrosaurus and may be pseudopalatine
Actinopteri
 Semionotiformes - Semionotidae
Semionotidae indet. Woodward 1890
Scales
Osteichthyes
 Palaeonisciformes -
Palaeonisciformes indet. Hay 1902
Scales