Sauroposeidon
The press release in 1999 immediately garnered international media attention, which led to many (inaccurate) news reports of "the largest dinosaur ever!". While "Sauroposeidon" likely represents the tallest known dinosaur taxon, it does not hold records for either the longest or most massive. "Patagotitan" or "Argentinosaurus" make better candidates for the title "World's Largest Dinosaur" (presuming to ignore, as is conventional, "Amphicoelias"), though incomplete fossil evidence makes exact rankings impossible.
Turiasaurus
"Turiasaurus" is believed to be the largest dinosaur ever found in Europe, and is among the largest dinosaurs known. It was originally estimated at in length and with a weight of 40 to 48 tonnes, the combined weight of six or seven adult male elephants. More recent estimates suggest a length of in length, but a comparable weight of 50 tonnes. The length of its skull is 70 centimetres, which is not too large. According to the paleontologist Luis Alcalá, this is because a larger head might have caused "Turiasaurus" to break its neck.