The first discovered remains referable to Thaichelys were discovered in 1980 along the road from Ban Huai Sanan Sai to Na Pha Song. The remains were initially described as Testudines indet. by de Lapparent de Broin et al. (1982)[3] before being referred to "Proganochelys" ruchae (now Thaichelys ruchae) in 1984.[1] The specimens have since become lost, but casts exist of all but one of the specimens in the French National Museum of Natural History.[2]
In 1981, three more specimens were discovered: SM2015-1-001 (the holotype) and SM2017-1-124–SM2017-1-136.[2] They were recovered from the exposed surface limestones of the Huai Hin Lat Formation, Ban Suan Sawan Banana Farm, Si Chomphu district[4] and were identified as belonging to a new species of Proganochelys (P. ruchae) by Broin (1984).[1]
In 2025, the specimens of "Proganochelys" ruchae were studied again and it was determined that they belonged to a new genus, which was named Thaichelys.[2]
References
1 2 3 Broin, F. de (1984). "Proganochelys ruchae n.sp., chélonien du Trias supérieur de Thaïlande". Studia Palaeocheloniologica Salmanticensia. 1: 87–97.
↑ Laojumpon C, Deesri U, Khamha S, Wattanapituksakul A, Lauprasert K, Suteethorn S. (2014). New vertebrate-bearing localities in the Triassic of Thailand. J Sci Technol MSU. 4335–43.
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