Classification of Buffetaut et al. 1997
Fm. †Tyrannosauridae Osborn 1906 [tyrannosaurid]
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G. †Alectrosaurus Gilmore 1933
G. †Siamotyrannus Buffetaut et al. 1996 [Siam tyrant]
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†Siamotyrannus isanensis Buffetaut et al. 1996
Fm. †Euhelopodidae Romer 1956 [euhelopodid]
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G. †Euhelopus Romer 1956
G. †Mamenchisaurus Young 1954
G. †Psittacosaurus Osborn 1923
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†Psittacosaurus sattayaraki Buffetaut and Ingavat 1992
Infraor. †Ornithomimosauria Barsbold 1976 [ornithomimosaur]
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G. †Phuwiangosaurus Martin et al. 1994
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†Phuwiangosaurus sirindhornae Martin et al. 1994
G. †Siamosaurus Buffetaut and Ingavat 1986
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†Siamosaurus suteethorni Buffetaut and Ingavat 1986