Original Paper


, Volume 96, Issue 2, pp 233-242

First online:

New material of the enigmatic reptile Khurendukhosaurus (Diapsida: Choristodera) from Mongolia

  • Ryoko MatsumotoAffiliated withCell and Developmental Biology, UCL University College London Email author 
  • , Shigeru SuzukiAffiliated withCenter for Paleobiological Research, Hayashibara Biochemical Laboratories, Inc.
  • , Khisigjav TsogtbaatarAffiliated withMongolian Paleontological Center, Mongolian Academy of Sciences
  • , Susan E. EvansAffiliated withCell and Developmental Biology, UCL University College London

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New material of the enigmatic diapsid Khurendukhosaurus is described from the Mongolian type locality, Khuren Dukh, providing additional data on the vertebral column, pelvis, and hind limb. It confirms the choristoderan status of the genus and permits a more detailed phylogenetic analysis that supports a relationship between Khurendukhosaurus and the long-necked Asian Hyphalosauridae. The existence of tall caudal neural spines implies that Khurendukhosaurus was a deep-tailed swimmer. This and the open sacral costocentral sutures suggest a primarily aquatic lifestyle.


Diapsida Choristodera Khurendukhosaurus Cretaceous Mongolia