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The crocodile monitor (Varanus salvadorii), also known as the Papuan monitor or Salvadori's monitor, is a species of monitor lizard endemic to New Guinea. It is the largest monitor lizard in New Guinea and is one of the longest lizards , verified at up to 255 cm (100 in).
Among these monitor lizards, some specimens weighed from 16–20 kg (35–44 lb). Another study in Sumatra by the same authors also estimates the weight of some specimens at 20 kg (44 lb) [185] while the average adult weight in the population is estimated to be about 7.6 kg (17 lb). [186] Crocodile monitor (Varanus salvadorii)
Nile monitors usually measure 1 m (3 ft 3 in) in length and weighs around 5 kg (11 lb), with exceptionally large specimens exceeding 2.4 m (7 ft 10 in) in length and 20 kg (44 lb) in mass, making it not only the fourth largest lizard after the Komodo dragon, Asian water monitor and crocodile monitor, but also the second largest reptile in the ...
Subgenus Papusaurus, with their only extant species being the Crocodile monitor, are considered the closest relatives of true monitors. Around 15 million years ago, a land bridge connecting Indochina and Australia appeared, allowing the ancestors of today's true monitors to enter Oceania.
Varanus includes the Komodo dragon (the largest living lizard), crocodile monitor, savannah monitor, the goannas of Australia and Southeast Asia, and various other species with a similarly distinctive appearance. Their closest living relatives are the earless monitor lizard and Chinese crocodile lizard. [3]
Lace monitor fossils from the middle Pleistocene have been found in Naracoorte Caves in South Australia. [15] Genetic analysis of mtDNA shows the lace monitor to be the closest relative (sister taxon) of the Komodo dragon, with their common ancestor diverging from a lineage that gave rise to the crocodile monitor (Varanus salvadorii) of New Guinea.
The saltwater crocodile is considered to be the largest extant reptile, verified at up to 6.32 m (20.7 ft) in length and around 1,000–1,500 kg (2,200–3,300 lb) in mass. [2] Larger specimens have been reported albeit not fully verified, [ 3 ] the maximum of which is purportedly 7 m (23 ft) long with an estimated mass of 2,000 kg (4,400 lb).
Perenties can grow to lengths of 2.5 m (8 ft 2 in) and weigh up to 20 kg (44 lb), possibly up to 3 m (9 ft 10 in) and 40 kg (88 lb), making it the fourth-largest extant species of lizard (exceeded in size only by the Komodo dragon, Asian water monitor and crocodile monitor).