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.
Dromaeosaurinae
All North American and Asian dromaeosaurine dinosaurs from the Late Cretaceous were generally small, no more than long, in "Dromaeosaurus" and "Adasaurus". However, among the dromaeosaurines were the largest dromaeosaurs ever; "Dakotaraptor" was ~ long, "Achillobator" , and "Utahraptor" up to ~.