Phu Wiang 9: Late/Upper Barremian, Thailand
collected by S. Triamwichanon 1993

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Spinosauridae
Spinosauridae indet. Stromer 1915
Samathi et al. 2021
caudal vertebrae SM-PW9B-17, SM-PW9B-13, SM- PW9B-15, SM-PW9B-14, SMPW9B- 16, SM-PW9B-11, SM- PW9B-12, and SM-PW9A-unnumbered (Figure 2). The material seems to belong to the same animal based on the size and shared phylogenetic affinity (see description and comparison).
Reptilia - Metriacanthosauridae
Theropoda indet. (Marsh 1881)
1 individual
    = Siamotyrannus isanensis n. gen., n. sp. Buffetaut et al. 1996
Buffetaut et al. 1996
PW9-1
see common names

Geography
Country:Thailand State/province:Khon Kaen County:Phu Wiang
Coordinates: 16.7° North, 102.3° East (view map)
Paleocoordinates:14.3° North, 110.9° East
Basis of coordinate:based on nearby landmark
Altitude:175 meters
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Barremian 10 m.y. bin:Cretaceous 2
Key time interval:Late/Upper Barremian
Age range of interval:130.00000 - 125.45000 m.y. ago
Stratigraphy
Geological group:Khorat Formation:Sao Khua
Stratigraphic resolution:formation
Stratigraphy comments: Non-marine bivalves suggest the Sao Khua Formation is late Barremian in age (Tumpeesawan et al. 2010; Samathi et al. 2019)
Lithology and environment
Primary lithology:red sandstone
Includes fossils?Y
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Associated major elements:all
Temporal resolution:snapshot
Collection methods and comments
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collectors:S. Triamwichanon Collection dates:1993
Collection method comments: discovered by Somchai Triamwichanon
Metadata
Also known as:P.W.9, Siamotyrannus type
Database number:36160
Authorizer:M. Carrano, P. Mannion Enterer:M. Carrano, G. Varnham
Modifier:G. Varnham Research group:vertebrate
Created:2004-01-14 14:07:20 Last modified:2022-05-05 06:20:08
Access level:the public Released:2004-01-14 14:07:20
Creative Commons license:CC BY
Reference information

Primary reference:

31097.ETE E. Buffetaut, V. Suteethorn, V. Martin, H. Tong, Y. Chaimanee and S. Triamwichanon. 1995. New dinosaur discoveries in Thailand. International Conference on Geology, Geotechnology and Mineral Resources of Indochina (Geo-Indo '95), 22-25 November 1995, Khon Kaen, Thailand 157-161 [M. Carrano/M. Carrano]

Secondary references:

62069 E. Buffetaut. 1997. Southeast Asian dinosaurs. In P. J. Currie & K. Padian (ed.), Encyclopedia of Dinosaurs 689-691 [M. Carrano/M. Carrano]
25804ETE E. Buffetaut, V. Suteethorn, and H. Tong. 1996. The earliest known tyrannosaur from the Lower Cretaceous of Thailand. Nature 381:689-691 [M. Carrano/M. Carrano/M. Carrano]
31086ETE E. Buffetaut, V. Suteethorn, H. Tong, Y. Chaimanee, and S. Khansubha. 1997. New dinosaur discoveries in the Jurassic and Cretaceous of northeastern Thailand. Proceedings of the International Conference on Stratigraphy and Tectonic Evolution of Southeast Asia and the South Pacific, 19-24 August 1997, Bangkok 177-187 [M. Carrano/M. Carrano]
9705 E. Buffetaut and V. Suteethorn. 1999. The dinosaur fauna of the Sao Khua Formation of Thailand and the beginning of the Cretaceous radiation of dinosaurs in Asia. Palaeogeography, Palaeoclimatology, Palaeoecology 150:13-23 [M. Carrano/M. Carrano/M. Carrano]
81586 A. Samathi, P. M. Sander, and P. Chanthasit. 2021. A spinosaurid from Thailand (Sao Khua Formation, Early Cretaceous) and a reassessment of Camarillasaurus cirugedae from the Early Cretaceous of Spain. Historical Biology 33(12):3480-3494 [P. Mannion/G. Varnham]