Bruhathkayosaurus (Greek for "huge-bodied lizard"); pronounced broo-HATH-kay-oh-SORE-us
Woodlands of India
Late Cretaceous (70 million years ago)
Size and Weight:
Up to 150 feet long and 200 tons
Huge size; long neck and tail
Bruhathkayosaurus is one of those dinosaurs that comes with a lot of asterisks attached. When the remains of this beast were discovered in India, in the late 1980's, paleontologists thought they were dealing with an enormous theropod along the lines of the northern African Spinosaurus. On further examination, though, some experts have speculated that Bruhathkayosaurus was actually a titanosaur, the huge, armored descendants of the sauropods that roamed every continent during Cretaceous times.
The trouble is, though, that the pieces of Bruthathkayosaurus that have been identified so far don't convincingly "add up" to a titanosaur; it's only classified as one because of its size. For example, the tibia of Bruhathkayosaurus was almost 30 percent bigger than that of Argentinosaurus, so if it really was a titanosaur it would have been by far the biggest dinosaur of all time--as much as 150 feet long and 200 tons. For now, though, pending further fossil discoveries, Bruhathkayosaurus languishes in limbo, not quite a titanosaur and not quite the biggest land-dwelling animal that ever lived.