The name iguana according to the eleventh edition of the Encyclopedia Britannica is derived from the Spanish equivalent of the Carib Indian name for these lizards, iwana. This name – iguana – was applied in 1825 to a fossil of a giant extinct herbivorous reptile, the Iguanodon. The Iguanodon, an extinct contemporary of the dinosaurs, and its modern namesake have in common a peculiar form of tooth, being round at the root and blade-like with serrated edges toward the tip. The teeth are described as pleurodont – that is, they are fastened to the inner surface rather than the top edge of the lower jaw.

This business of systematically classifying iguanas gets sticky,  and with the aim of clarifying  the issue you might want to refer to the informal arrangement in the next chapter. Bear in mind that this chapter is primarily about the true iguana, Iguana iguana, and in passing we will make reference to the dozen or so typical iguanas.

Uglogical

http://uglogical.com/

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