The auction comes after Sotheby's sold a Tyrannosaurus rex, dubbed"Gus", for a record $50.1m (£37.4m) in July.
These things without a doubt will end end up in a museum at some point."The auction of the rare skeleton comes amid debate in the scientific community about whether dinosaur remains should end up in private hands or public view.
The auction of"Jodi"comes as some scientists warn that auctions could herald a new era in fossil collecting by the ultra-rich.
Researchers told the after the sale of"Gus"that such remains should be exhibited in public spaces where they can be more freely studied.
The sale comes a year after researchers confirmed that the skeleton belongs to a distinct genus.
"Although its a scary prospect, actually a lot of them have ended up in the public eye...
Their paper ended decades of debate over whether the dinosaurs were distinct from one another.
Responding to today's auction, Brusatte called it"harrowing"that"Jodi"could disappear from public view.
The mounted skeleton of a newly-identified dinosaur once mistaken for a young Tyrannosaurus rex is up for auction - with a price-tag of at least $6m (£4.5m).
The Late Cretaceous carnivore is expected to fetch up to $9m when it goes under the hammer on Tuesday.