The smallest known dinosaur is Epidexipteryx, and it weighed only 0.36 lb. The largest known dinosaur with well preserved remains was Argentinosaurus, which weighed up to 80 tons.
The largest dinosaur known from well preserved remains is Argentinosaurus. Its name means "Argentina lizard."
Apatosaurus was 75 feet long and weighed between 18 and 25 tons. The largest dinosaur known from good remains is Argentinosaurus. It was 98 feet long and weighed 80 tons.
The largest dinosaur was definitely a sauropod, or long necked, quadrupedal, herbivore. However, mass estimates can be tricky with dinosaurs. The largest were either Amphicoelias (known from poorly preserved remains, so the estimate of 100 to 150 tons may not be accurate), Antarctosaurus (known from incomplete remains, but may have weighed 69 to 80 tons), or Argentinosaurus (50 to 73 tons).
The largest dinosaur is Amphicoelias, at 200 ft long.
Argentinosaurus
Argentinosaurus
Gigantosaurus is a poorly known herbivorous dinosaur, and is not to be confused with Giganotosaurus. Giganotosaurus is the third largest carnivorous dinosaur known, behind Spinosaurus and Carcharodontosaurus.
Apparently, Argentinosaurus is the largest dinosaur discovered so far. There is always a chance that an even larger dinosaur may be discovered - so updating the current accepted dinosaur facts.
No. Spinosaurus was the largest known carnivorous dinosaur, but some of the herbivores, particularly the sauropods, where much larger.
The heaviest dinosaur known from reliable remains is Argentinosaurus (at around 80 tons), there are some indications that the dinosaurs Amphicoelias and Bruhathkayosaurus were even larger and heavier, but they are known from very poor and unreliable evidence.The tallest known dinosaur is Sauroposeidon (17 meters in height), but again it's known from poor remains and its maximum height was extrapolated from a comparison with related animals such as Brachiosaurus.All of these dinosaurs were sauropods, the largest animals ever to have walked the Earth.
The heaviest dinosaur known from good remains is Argentinosaurus. They weighed up to 80 tons.