Genus of lizard first described by Austrian naturalist Josephus Nicolaus Laurenti in 1768 (6)

I believe the answer is:

iguana

(Other definitions for iguana that I've seen before include "Could be a monitor" , "Large tree-climbing lizard of tropical America" , "Arboreal lizard with a spiny crest" , "Large crested lizard" , "Arboreal lizard of S America" .)

I've seen this clue in The Independent.

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