ever discovered was
extinct megalania from
Australia • The prehistoric Australian
megalania (
Varanus priscus), which may have existed up to 40,000 years ago, is the largest
varanid and the largest terrestrial lizard known to exist, but the lack of a complete skeleton has resulted in a wide range of size estimates. Molnar's 2004 assessment resulted in an average weight of and length of , and a maximum of at in length, which is toward the high end of the early estimates. However, a 2009 study estimated megalania at 5.5 m (18 ft) and 575 kg (1,268 lb). • Some prehistoric non-varanoid
anguimorphs approached varanid sizes.
Palaeosaniwa was roughly comparable to a large monitor lizard (
Varanidae) in size. Measuring around in length, it is among the largest terrestrial lizards known from the Mesozoic era. Later study shows estimation with
snout–vent length about for
Maastrichtian species.
Asprosaurus may compete with
Palaeosaniwa in size. Another large Mesozoic lizard was
Chianghsia, with snout-vent length of over . ==See also==