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Megalania
Temporal range: Late Pleistocene
Megalania skeletal reconstruction on Melbourne Museum steps
Scientific classification
Kingdom: Animalia
Class: [Sauropsida]]
Order: Squamata
Family: Varanidae
Genus: Varanus
Binomial name
Varanus priscus
Owen 1859

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 .

Size

Varanus priscus skull
Megalania skull, about 74 cm (29 in) long, at Museum of Science, Boston

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.

This is twice the length of their closest living relative, the Komodo dragon of eastern Indonesia.

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