Megalania

Megalania
Temporal range: Pleistocene,
Megalania skeletal reconstruction on Melbourne Museum steps
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Lanthanotidae
Genus: Varanus
Species:
V. priscus
Binomial name
Varanus priscus
Owen, 1859
Synonyms
  • Megalania prisca (Owen, 1859)
  • Notiosaurus dentatus Owen, 1884
  • Varanus dirus de Vis, 1889
  • Varanus warburtonensis Zeitz, 1899

Megalania (Varanus priscus) is an extinct species of giant monitor lizard, part of the megafaunal assemblage that inhabited Australia during the Pleistocene. It is the largest terrestrial lizard known to have existed, but the fragmentary nature of known remains make estimates highly uncertain. Recent studies suggest that most known specimens would have reached around 2–3 m (6.6–9.8 ft) in body length excluding the tail, while some individuals would have been significantly larger, reaching sizes around 4.5–7 m (15–23 ft) in length.

Megalania is thought to have had a similar ecology to the living Komodo dragon (Varanus komodoensis) which may be its closest living relative. The youngest fossil remains of giant monitor lizards in Australia date to around 50,000 years ago. The first indigenous settlers of Australia might have encountered megalania, and been a factor in megalania's extinction. While originally megalania was considered to be the only member of the titular genus "Megalania", today it is considered a member of the genus Varanus, being closely related to other Australian monitor lizards.