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.
Aramberri, Nuevo León
In 2002, Aramberri, attracted national and international media attention when it was announced the discovery of a large Pliosaur fossil, often referred by the press as "the Aramberri Monster", as they believed it looks like the Lochness Monster. The specimen is actually a very large pliosaur, possibly reaching 15 m (50 ft) in length. The media published exaggerated reports claiming it was 25 m (80 ft) long, and weighed up to 150,000 kg, which would have made it the largest predator of all time. This error was dramatically perpetuated in BBC's documentary series "Walking with Dinosaurs", which also prematurely classified it as a Liopleurodon ferox. On January 7, 2003, the fossil was transferred and reconstructed at the Natural History Museum of Karlsruhe in Germany, and was kept in exhibition until 2003, when it was transferred to the Museo del Desierto in Saltillo, Coahuila. The fossil is on exhibition at the Museo de historia Mexicana in Monterrey.