Atoposaurid crocodyliforms from the Khorat Group of Thailand: first record of Theriosuchus from Southeast Asia

作者：Lauprasert Komsorn^*; Laojumpon Chalida; Saenphala Wanitchaphat; Cuny Gilles; Thirakhupt Kumthorn; Suteethorn Varavudh

来源：Palaeontologische Zeitschrift, 2011, 85(1): 37-47.

DOI：10.1007/s12542-010-0071-z

• Atoposauridae
• Early cretaceous
• Thailand
• Southeast Asia

We describe a partial crocodilian skull from the Mesozoic non-marine sediments of the Khorat Plateau Sao Khua Formation (Berriasian-Barremian) in northeastern Thailand and assign it to Theriosuchus grandinaris sp. nov. An isolated dentary from the Phu Kradung Formation (latest Jurassic-Early Cretaceous) is also tentatively assigned to the genus Theriosuchus, and an isolated tooth from the Khok Kruat Formation (Aptian-Albian) may belong to this genus. The Thai fossils represent the first unambiguous evidence of presence of Theriosuchus outside Europe. Its occurrence in Thailand increases the known diversity of neosuchian crocodyliforms from Southeast Asia and suggests that Atoposauridae had a wide geographical distribution from the Late Jurassic to the Early Cretaceous.

• 出版日期2011-3