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Temporal range: Late Pleistocene
|Megalania skeletal reconstruction on Melbourne Museum steps|
| Varanus priscus|
Megalania (Varanus prisca) was a giant monitor lizard that lived in southern Australia. It was part of a species of megafauna that lived during the Pleistocene, and appears to have disappeared around 40,000 years ago. The first Aboriginal settlers of Australia may have encountered living Megalania.
Megalania is the land-based lizard known to have existed. Judging from its size, Megalania would have fed mostly upon medium- to large-sized animals, including any of the giant marsupials like Diprotodon .
Ralph Molnar in 2004 determined a range of possible sizes for Megalania. He did this by scaling up from dorsal vertebrae, after he determined a relationship between dorsal vertebrae length and total body length. If it had a long thin tail like the Lace monitor (Varanus varius), then it would have reached a length of 7.9 metres (26 ft). If its tail-to-body proportions were more similar to that of the Komodo dragon, then a length of around 7 metres (23 ft) is more likely. Using 7 m as the maximum length, Molnar estimated the average weight of the lizard at 320 kilograms (710 lb), and 1,940 kilograms (4,280 lb) as the maximum.
- "Megalania, giant ripper lizard". BBC Science & Nature. http://www.bbc.co.uk/nature/wildfacts/factfiles/3046.shtml. Retrieved 20 May 2013.
- R. E. Molnar (2004). Dragons in the dust: the paleobiology of the giant monitor lizard Megalania. Indiana University Press. . https://books.google.com.au/books?id=AvPHRQYqEcQC&redir_esc=y.
- R. E. Molnar (2004), "History of monitors and their kin", in E. R. Pianka; D. King; R. A. King, Varanoid lizards of the world, Indiana University Press