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Geological Society, London, Special Publications; 2009; v. 315; p. 175-187;
DOI: 10.1144/SP315.13
© 2009 Geological Society of London

Articles

Khoratosuchus jintasakuli gen. et sp. nov., an advanced neosuchian crocodyliform from the Early Cretaceous (Aptian-Albian) of NE Thailand

K. Lauprasert1,2, G. Cuny3, K. Thirakhupt4 & V. Suteethorn5

1 Department of Biology, Faculty of Science, Mahasarakham University, Khamrieng, Kantharawichai, Mahasarakham, 44150 Thailand
2 Palaeontological Research and Education Centre, Mahasarakham University, Khamrieng, Kantharawichai, Mahasarakham, 44150 Thailand
3 Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5–7, 1350 Copenhagen K, Denmark
4 Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10300, Thailand
5 Bureau of Fossil Research and Museums, Department of Mineral Resources, Rama VI Road, Bangkok 10400, Thailand

*Corresponding author (e-mail: lauprasert{at}gmail.com)

A new slender-snouted neosuchian crocodyliform, Khoratosuchus jintasakuli gen. et sp. nov., is described from the late Early Cretaceous Khok Kruat Formation of NE Thailand. This discovery represents the youngest and most advanced Mesozoic crocodyliform known in Thailand on the basis of the following cranial features: the secondary choanae are relatively posterior and almost enclosed by the pterygoid; the lateral margin of the maxilla is relatively straight without lateral constrictions; the dorsal surface of the skull lacks ridges and fossae; maxillary teeth are homodontous; the anterior end of the jugal and prefrontal terminate at the same level. The specimen bears resemblances to Chinese and European derived neosuchians and suggests a close relationship between the late Early Cretaceous neosuchians of China, Europe and SE Asia.