Pseudocrypturus is a genus of extinct paleognathous bird. One species is known, Pseudocrypturus cercanaxius. It is a relative of such modern birds as ostriches. It lived in the early Eocene.The holotype fossil is in the collection of the Smithsonian's National Museum of Natural History. It has catalog number USNM 336103. It was collected from the Fossil Butte Member, Green River Formation, Lincoln County, Wyoming.[1]
Pseudocrypturus means false tinamou. The species name cercanaxius comes from ancient Greek words, tail, and, worthless, in reference to the rudimentary pygostyle of this species.