The apex predator made mincemeat of Christie’s opening price of between US$6 and US$8 million, showing off the lasting power of the T-Rex.

It then shredded the previous record set by a specimen called Sue that was sold for US$8.4 million in October 1997 by Sotheby’s to the Field Museum of Natural History in Chicago.

Only around 50 Tyrannosaurus fossils have been discovered since the first was unearthed in 1902.

Bids hit the US$9 million mark in less than two minutes after the start of the auction, but after 14 minutes there were just three bidders left in the race, until the hammer came down on an offer of US$27.5 million, to which were added costs and commissions.

The sale was organised in New York, where the expert assessor was located, but with lines open to Hong Kong and London, where Christie’s specialists were taking calls from collectors.

The fossil, nicknamed Stan, stands 4m high and 12.19m long, with puncture marks in the skull and neck that experts believe show evidence of fights with fellow T-Rexes.

He would have weighed in at around eight tons when alive, some 67 million years ago.

The fossil was discovered in South Dakota in 1987 and named after the amateur palaeontologist who came across the remains, Stan Sacrison.

Palaeontologists from the Black Hills Institute of Geological Research in South Dakota spent more than 30,000 hours excavating and then assembling the 188 bones of the skeleton.

Casts were then taken for dozens of museums around the world that wanted a copy of this exceptional specimen of Tyrannosaur, which experts believe was around 20 years old when it died.

Ironically, the terms of the sale prevent the buyer from producing 3D models of the dinosaur.

By law, such specimens can only be sold if the fossil was discovered on private land, which in this case it was.