Giganotosaurus Is By Far The Biggest I know For a Fact i Have Done Lots of reserch on this and the 2nd is the new Found Mapusaurus 3rd is Saurophaganax 4 is spino and 5th is Rex Now this is Not Done By Power if i was it would Go like This



1.Rex
2.Gianotosaurus
3.Saurophaganax
4.Mapusaurus
5 Spino

I am in Tafe doing A Corse Of paleo so i did a real good look up even Seen Get Skulls For myself So its up to date Info ( Sorry but Spino is Just Crap)

sorry to brake your spirit but, Sinosaurus is the largest of the Theropods

Yes, the actual largest dinosaur is Spino...but there is proof that Saurophaganax could of been bigger.

It would go more like this.

1. Spino
2. Carcharodontosaurus
3. Gigantosaurus
4. Mapusaurus
5. T-rex

Saurophaganx is either larger than Spino or between Carcharodontosaurus and Spino.

Ye Spino is the larges therapod, Ultrasaurus is the overall biggest.

isn't Diplodocus the largest, its over 75ft long

There is still a debate wether Ultrasauros and Supersaurus are the same dinosaurs...They do share the remains.

Actually, the largest Dinosaur of all time goes to Argentinosaurus...It weighed possible over 100 tons. The Longest goes to Seismosaurus. The only remain was a juvenile that possibly choked on a gastrolith...it was 150 feet long.

Giganto has been out of the running for years now, what outdated books have you been reading?